How To Use Cretaceous In A Sentence
-
The first cycle initiated in the early Paleocene and represents a transition from Cretaceous marine turbidites and shales to subaerial fluvial sandstones and conglomerates.
-
However, early calapids in the Cretaceous were smaller in size and are not considered as major predators of bivalves and gastropods.
-
The Los Zorros property covers the entire breadth of a regional anticlinorium in an area that is the locus of younger intrusive activity which intruded up through the fold-deformed lower Cretaceous section of volcaniclastic, siliclastic, and limestone formations and intrusive diorite sills.
StreetInsider.com News Articles
-
These are cut by intrusions of late Cretaceous-early Tertiary (Laramide) age, ranging from tonalite to granodiorite in composition.
Marketwire - Breaking News Releases
-
The true giants did not arrive until the middle of the Cretaceous period.
-
More specifically, there are Triassic, Jurassic, Cretaceous, Eocene, and Miocene marine and Oligocene and Plio-Pleistocene nonmarine sedimentary rocks.
Santa Monica Mountains (Bailey)
-
Recent restudy of the inclusions in that collection indicate that the material is Cretaceous, as based on the presence of Serphitidae and several other families of insects restricted to the Cretaceous.
-
The Uhangri sauropod ichnites are the first Late Cretaceous manus-only sauropod trackways and are among the few Late Cretaceous sauropod tracks.
-
At some point, Leaellynasaura, a Lower Cretaceous hypsilophodontid from Victoria, Australia, was described as a carnivore when it, like all hypsilophodontids, is actually an herbivore.
Entry #1,909
-
During Early Cretaceous times, there was a significant period of plutonism and crustal growth in the magmatic arc.
-
The occurrence of this specimen in nearshore beach deposits is somewhat unusual, as articulated or associated remains of Cretaceous sea turtles are more commonly encountered in lagoonal or offshore marine shale and chalk.
-
The cerrado is a vegetation formation of great antiquity, that may have existed in "prototypic form in the Cretaceous, before the final separation of the South American and African continents.
Chris McGowan: Biofuel Could Eat Brazil's Savannas & Deforest the Amazon
-
Cretaceous, which is folded and faulted and forms all the higher hills, and there is a newer series of Tertiary age, which lies nearly horizontal and rests unconformably upon the older beds.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy"
-
Contemporaries of the last dinosaurs, paddle-limbed mosasaurs, inhabited seas of the Cretaceous period, which ended about 66 million years ago.
-
I just want to send a big congratulations out there to my friend Laura Wilson whose first published paper "Comparative taphonomy and paleoecological reconstruction of two microvertebrate accumulations from the Late Cretaceous Hell Creek Formation Maastrichtian, eastern Montana" came out in the new issue of PALAIOS today.
CONGRATS LAURA!!!
-
Up to 2000 m of alluvial fan and fan delta deposits of early Cretaceous age are preserved in the Coastal Cordillera.
-
Recent work on Upper Cretaceous sequence stratigraphy in European basins has demonstrated that chalks provide valuable information on short- and long-term sea-level change.
-
This subsection consists mostly of folded, faulted, and generally metamorphosed sediments and volcanics of the Franciscan Complex and less extensive Cretaceous sediments of the Great Valley Sequence.
Leeward Hills (Bailey)
-
Similarly, the huge reptiles which dominated the land, sea, and even the air of the Cretaceous are all gone.
-
The Jurassic and Cretaceous together were the age of giant reptiles.
-
Recent study and restudy of historical material at the Natural History Museum in London reveals several exclusively Cretaceous insect taxa in Burmese amber, indicating its probable Cretaceous age.
-
A tiny new "feathered" ornithischian dinosaur from China, the Early Cretaceous heterodontosaurid Tianyulong confuciusi.
"So lose some sleep and say you tried."
-
The emeralds are found in black calcareous shales interbedded with limestones of Cretaceous age.
-
According to Tinka Resources Ltd., press release dated January 24, 2007, mapping and prospecting has outlined a 1,000 by 800 metre area hosted by granodiorite and quartz monzonite of the Coastal Batholith which intruded Jurassic and Cretaceous sediments and volcanic.
Marketwire - Breaking News Releases
-
A family of Arambourgiania philadelphiae - a large azhdarchid pterosaur, formally called "Titanopteryx," found in Jordan from the Late Cretaceous Maastrichtian.
Life's Time Capsule: Pterosaur Gallery
-
Etymology.-From Cretaceous, the geological epoch of the genus; and the standard suffix for thrips binomials.
-
The dinosaurs were only one of the groups that became extinct at the end of the Cretaceous; also hard-hit were the unicellular Foraminifera, the ammonites, and marine reptiles such as the mosasaurs and plesiosaurs.
-
In this paper, we discuss the oxygen content of the Late Cretaceous sea water by means of microfossil proxies .
-
The majority of these records are from the USA, where Late Cretaceous strata of the Western Interior, the Gulf Coast, and the Eastern Coastal Plain provide a nearly continuous sequence of mosasaur faunal evolution.
-
The story of Mesozoic birds became complicated by the discovery in 1985, by Russian colleague Evgeny Kurochkin, of Ambiortus, a Lower Cretaceous archaic but modern-type ornithurine (carinate) bird with an advanced flight apparatus.
-
Extracts of material from New Zealand dating back to a meteor impact 65 million years - during the Cretaceous-Tertiary, K-T - period were thought to contain fullerenes because of intriguing peaks in their chromatograms.
-
The south slope is generally planar except where incised by glacial or fluvial valleys and is a remnant peneplain of late Cretaceous-early Tertiary age, which is well developed in western Mongolia and adjacent regions of China.
-
In a new, as-yet-unpublished sauropod from the Lower Cretaceous of the Isle of Wight, it’s been claimed that the first and fifth metacarpals virtually touch on the posterior surface of the hand, but this is unique so far as we know (this animal wouldn’t have left horseshoe-shaped tracks, but subcircular ones … if the proposed interpretation is valid, and it might not be).
Archive 2006-04-01
-
Sauroposeidon proteles, a new sauropod from the Early Cretaceous of Oklahoma.
‘Angloposeidon’, the unreported story, part I
-
Paralititan stromeri is another massive titanosaur, this time from the Upper Cretaceous of Egypt.
Archive 2007-01-01
-
This standard is one of the richest materials in 13C, because the Cretaceous is the time with abundant plant growth near all our coal is of that period.
WSJ: House Energy report on the "mutual admiration society" « Climate Audit
-
Four new molluscan species, a bivalve and three gastropods, are named from shallow-marine, lower Upper Cretaceous strata in Oregon.
-
The sedimentary record in the Taranaki Basin indicates that during the Late Cretaceous to Early Tertiary, the Cape Egmont and Manaia Fault Zones behaved as normal faults downthrowing to the east.
-
High southern latitudes were not invaded by angiosperms until the end of the Cretaceous.
-
The gasteropodous shells are of but little real assistance, although the Ancillaria belongs to a type as yet only known by one or two species high up in the Cretaceous; the oldest members of the family being in that horizon.
Transactions of the American Philosophical Society
-
But the monotremes probably split away from this main line of evolution early on, in the late Jurassic or early Cretaceous.
-
The Cretaceous rocks that occupy the southern part of the block between the TLF and fault A are partly overthrust by those of Carboniferous age in a SW direction.
-
Pollen indicates that this formation is Tertiary, coming shortly after the meteor impact at the end of the Cretaceous.
-
During the mid-Cretaceous a phase of plutonism in Palmer Land caused uplift and erosion that supplied sediment from the arc.
-
This subsection contains mainly Mesozoic granitic and mafic plutonic rocks, Jura-Triassic volcanic rocks, Pre-Cretaceous metamorphic rocks, and Eocene and Oligocene marine and nonmarine and Miocene marine sedimentary rocks.
Coastal Hills (Bailey)
-
Initiation of a cold, upwelling current off the west coast of South America dates back to latest Cretaceous to earliest Palaeocene times.
-
This assumption is reasonable because the maximum likelihood estimates of early Cretaceous and Neogene palaeogeothermal profiles are both similar to the present-day gradient.
-
The mentioned above dating results imply that Mesozoic magmatism in the NCB chiefly happened in early Cretaceous.
-
And with new evidence supporting that these dinosaurs were more "rotund" than previously hypothesized, the image sticks in my mind of this little pig-bodied, parrot-beaked reptile, studiously pawing the Early Cretaceous subtropical regions that are now Western Siberia, in search of roots, tubers, or a place in the mud to cool off.
Life's Time Capsule: The Ceratopsians Gallery
-
During the Cretaceous, however, an ocean basin existed in this area, either as a remnant ocean that had escaped Jurassic obduction or as a small Cretaceous pull-apart basin.
-
The first cycle initiated in the early Paleocene and represents a transition from Cretaceous marine turbidites and shales to subaerial fluvial sandstones and conglomerates.
-
Many layers of decaying organic matter built up in Pennsylvania during the Cretaceous, and now it is all coal.
-
The Pliocene is a more interesting case but note the dinos I was talking about are back in the Cretaceous, so we’re talking about different climates here.
The Volokh Conspiracy » Economic Climate Change Denialism:
-
So, here I am still excited by Limusaurus, the herbivorous ceratosaurid, and up pops a previously unknown form of the speciose ceratopsian genus Psittacosaurus (presently 10-11 valid species known), from the Cretaceous of Inner Mongolia.
Spock, Obama, the Kwisatz Haderach, and decriminalizing evolution.
-
The dominant features are the limestone formations of the middle and upper Triassic, the upper Jurassic and the upper Cretaceous, especially the so-called Durmitorean flysch.
Durmitor National Park, Montenegro
-
The Cretaceous Winton and Mackunda Formations are composed of interbedded mudrock, sandstone, coal and carbon-bearing mudrock.
FinanzNachrichten.de: Aktuelle Nachrichten
-
I’m also mentioning the Pliocene rather than the Cretaceous or Jurassic or some relatively remote period, because the Pliocene is the period just before the standard Vostok 800 Kyr graphic.
Pliocene #1: North Greenland « Climate Audit
-
Here, a diverse and well-preserved assemblage of dinosaur meat-eating theropod, long-necked sauropod, and plant-eating ornithopod, pterosaur, and bird tracks have been recovered from Lower Cretaceous-aged rocks exposed along the Yellow River.
Dinosaurs along the Silk Road
-
In contrast, dinosaur fossils have been traced in Triassic, Jurassic and Cretaceous periods.
-
This subsection contains mainly Mesozoic granitic and mafic plutonic rocks, Jura-Triassic volcanic rocks, Pre-Cretaceous metamorphic rocks, and Eocene and Oligocene marine and nonmarine and Miocene marine sedimentary rocks.
Coastal Hills (Bailey)
-
They were probably accreted late in the Cretaceous.
-
The steep contacts and elongate outcrops of the Upper Jurassic and Lower Cretaceous complexes do not, therefore, rule out gently dipping, tabular form per se.
-
In the southern part of the valley, the Serghaya Fault Zone follows the mountain front juxtaposing recent alluvium and colluvium against late Quaternary lake sediments, Neogene conglomerates, and Cretaceous carbonates.
-
Several academic projects that have been mentioned on the blog have yet to come to fruition, including that long-delayed manuscript on British dinosaur diversity, and work on Cretaceous Spanish vertebrates, Wealden sauropods, and azhdarchid ecology.
Archive 2007-01-01
-
For these, and some other, related reasons, the Late Cretaceous is a particularly tricky time for map-makers trying to draw coastlines.
-
Ricardo Delgado (W/A) and Jim Campbell (C) Dawn breaks over a sprawling forest in Cretaceous North America†a dawn far colder than its peaceful, forest-dwelling herbivores are used to.
MSP#150: Yeah, we can't believe it either... | Major Spoilers - Comic Book Reviews and News
-
By the Cretaceous, fossils with well-defined longitudinal ridges appear, as in modern species of Dentalium and its close relatives (Family Dentaliidae).
-
These crucial means of breeding prevailed throughout the Jurassic and Cretaceous times.
-
The model suggests the Cretaceous landscape was filled with large, lumbering creatures that any human with a fast car or bike or maybe even a quick sprint could outpace.
-
Argentinosaurus huinculensis, named in 1993, is a huge titanosaur from the Upper Cretaceous Río Limay Formation of Argentina: it was perhaps 30 m long.
Biggest…. sauropod…. ever (part…. I)
-
The split between the oscine and suboscine lineages is assumed to have occurred in the late Cretaceous, when the South American and Indian tectonic plates became isolated.
-
Tyrannosaurus rex may have towered over its Cretaceous competition, but for their first 80 million years, most tyrannosaur species were small-timers -- no bigger than humans, researchers ...
T. Rex Were Human-Size Dinosaurs For 80 Million Years
-
The Mesozoic era lasted from about 251 to 66 million years ago and includes the Triassic, Jurassic, and Cretaceous periods.
-
During the Cretaceous and Tertiary periods, many shells became coarsely plicate.
-
In the interior basin, the Jurassic-Cretaceous boundary marks a disconformity.
-
Fast forward to the mid-cretaceous “saurian sauna”, when there was no ice at sea level at poles.
AGU Day 2: The role of CO2 in the earth’s history | Serendipity
-
By the Late Cretaceous, species of Hoploparia were distributed throughout temperate and subarctic regions of both hemispheres.
-
They found the rare element iridium in the thin clay layer that caps the rocks of the Cretaceous era.
-
Climate models for the mid-Cretaceous predicted warm humid climates for this region.
-
There is a parallel here with the hadrosaur and ceratopsian dinosaurs of the Late Cretaceous.
-
However, there seems to be a marked age gap between the Cretaceous ages and onset of rifting in the Eocene.
-
A total of 772 samples have been analysed for microfossils from the proximal Cretaceous succession of the Orange Basin during the past 10 years.
-
The egg case secreted by the Cenozoic argonautids was shaped like Cretaceous ammonites, which their ancestors used to occupy and emend.
-
Flysch, representing both the Cretaceous and Eocene systems, is widely distributed.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"
-
Upper Cretaceous : Including the Sifangtai Formation — Minshui Formation, corresponding to the Cenonian — Maestrichtian.
-
The rolling to nearly level plains of the Northern Blackland Prairie ecoregion are underlain by interbedded chalks, marls, limestones, and shales of Cretaceous age.
Ecoregions of Texas (EPA)
-
From his first, perhaps best book, "The Immense Journey," he showed a gift for transporting his readers across aeonic expanses—evoking the "croaking gloom of carboniferous swamps" and "the surf on Cretaceous beaches where now the wheat of Kansas rolls.
Dispatches From the Natural World
-
Because of the lack of the external conch the octopods swam swiftly, and successfully coped with the upper Cretaceous marine predators.
-
The Niger Delta is the product of both fluviatile and marine sediment build-up since the upper Cretaceous, and its low relief is responsible for the meandering and frequent shifting of the Niger and its tributaries.
Niger Delta swamp forests
-
Among the dozen specimens obtained were some fossil ammonites (a family of chambered shells) of genera which are found on other continents in certain formations classified as the Cretaceous system, and which occur neither above these formations nor below them.
The Elements of Geology
-
Because of the lack of the external conch the octopods swam swiftly, and successfully coped with the upper Cretaceous marine predators.
-
Soils developed over the lava deposits are mainly lithosols, while regosols are predominant on the Quaternary and pre-Cretaceous basinal deposits.
Ethiopian xeric grasslands and shrublands
-
A mere explanation that a pterodactyl was a kind of flying reptile belonging to the Jurassic and Cretaceous periods was insufficient.
DEVELOPMENT A NOVEL BY W. BRYHER WITH A PREFACE BY AMY LOWELL
-
Recent work on Upper Cretaceous sequence stratigraphy in European basins has demonstrated that chalks provide valuable information on short- and long-term sea-level change.
-
Dr William Atherstone and Andrew Geddes Bain discovered the first cretaceous stegosaur in the Bushman's River Valley.
-
On digging or boring below these, we ought to come upon the chalk, and below the chalk again, with its cretaceous congeners the greensand or the gault, we ought to meet the Weald clay and the Hastings sand.
Science in Arcady
-
The mosasaur is a large marine lizard that lived around the end of the Cretaceous period, about 85 million to 65 million years ago, and inhabited the shallow seas that once covered much of Saskatchewan.
Canada.com Top Stories
-
The taphonomy and paleoecology of this giant foraminiferan are briefly evaluated based on comparison with modern examples of Bathysiphon and with other Cretaceous examples from the same region.
-
The foothills of the Pyrenees are composed of sedimentary Jurassic and Cretaceous limestones which favour the creation of natural cave systems.
-
The annihilation of the dinosaurs marks the boundary linking Cretaceous time and Tertiary time.
-
A preliminary account of a new tyrannosauroid theropod from the Wessex Formation (Early Cretaceous) of southern England.
Archive 2006-07-01
-
Today paleontologists know the Badlands are full of bones of mosasaurs (giant marine reptiles that plied an inland sea there during the Cretaceous period) and pterosaurs (giant flying reptiles).
-
The symmetrical, diphycercal tail, not perfected by gnathostomes until the Cretaceous, was standard equipment on heterostracans in the Silurian.
-
Late Cretaceous obduction of ophiolite complexes onto the Indian shield has also been reported from Pakistan.
-
The Curved Bill Thrasher builds large twig nests in our chollas, have accipiter orange eyes, sings a beautiful song, and that bill from the Cretaceous makes it a favorite.
Matt's Ten Birds Part 3
-
Present along the surface exposures of the anticline are rocks dating from Upper Cretaceous to Paleocene age.
-
As a result, Triassic rocks in the hanging wall thrust onto Upper Cretaceous rocks in the footwall.
-
But the fact that an ancestor of an important modern pollinator existed back then could help scientists explain the rapid expansion of floral diversity in the early to mid-Cretaceous.
-
As such, they have been found fossilized in Jurassic and Cretaceous deposits, and have been used to reconstruct paleoclimates.
-
Flat or slightly rolling terrain is the rule here, and thick soil deposits overlay Cretaceous shale bedrock.
-
Although pieces of eggshells were collected by Standhardt from the Late Cretaceous deposits in Big Bend, no complete eggs or nests have been found in the area.
-
West of the Alpine Fault, the rocks of South Westland consist of a basement of Ordovician greywacke with some high temperature metamorphic rocks and granites, and minor areas of younger Cretaceous and Tertiary sedimentary rocks along the coast.
Te Wahipounamu (South-West New Zealand World Heritage Area), New Zealand
-
A huge curved claw on each foot made Deinonychus a small but particularly deadly dinosaur of the Cretaceous Period.
-
Argonauta shares other characteristics with some Jurassic and Cretaceous ammonites, namely multicuspid rachidial tooth on the radula.
-
Oh, I've also slowly been making my way through the new (September) issue of the Journal of Vertebrate Paleontology, and have read, over the past few days, "A new ornithischian dinosaur from the Lower Cretaceous Kuwajima Formation of Japan," "The anatomy and systematics of Colepiocephale lambei [Dinosauria: Pachychephalosauridae]," and "Rapid somatic expansion causes the brain to lag behind: the case of the brain and behavior of New Zealand's Haast's Eagle [Harpagornis moorei].
So not awake it hurts.
-
The annihilation of the dinosaurs marks the boundary linking Cretaceous time and Tertiary time.
-
In the Late Cretaceous period, the world was covered with warm-temperate to tropical areas that swarmed with blood-sucking insects carrying leishmania, malaria, intestinal parasites, arboviruses and other pathogens.
How Dinosaurs disappear from earth.
-
For that matter, extant birds are quite different from Jurassic and Cretaceous birds.
-
Diatoms have an extensive fossil record going back to the Cretaceous; some rocks are formed almost entirely of fossil diatoms, and are known as diatomite or diatomaceous earth.
-
More specifically, there are Cretaceous, Eocene, Miocene, and Pliocene marine and Oligocene and Plio-Pleistocene nonmarine sedimentary rocks.
Simi Valley - Santa Susana Mountains (Bailey)
-
These layers extend seaward into the submerged Continental Shelf and are overlain by deposits of both Continental and Marine origins (Upper Cretaceous Age) dating from 135-65 million years before the present.
Beachwood Borough Master Plan, Part IV « Beachwood Historical Alliance
-
The differences between the ophiolite and Cretaceous arcrelated rocks are shown in Figure 4.
-
Attempting to provide a purely terrestrial explanation for the central uplift, 1 have suggested that it could have been caused by reactive diapirism of the Lower Jurassic succession beneath an extending Cretaceous cover.
-
None of the streams draining upland areas of the Southeast were glaciated during Pleistocene ice ages or inundated by Cretaceous seas during interglacial periods.
-
However, seismic interpretation within the saddle is rendered difficult by the presence of numerous magmatic intrusions in the Cretaceous section.
-
The catastrophe of the Late Devonian was roughly equivalent in magnitude to the event at the end of the Cretaceous that killed the dinosaurs.
-
These metamorphic and plutonic igneous rocks form the uplifted core of the broadly anticlinal Owl Creek Mountains, a mountain range that formed during the Late Cretaceous.
-
The sequence overlies Upper Triassic to Upper Cretaceous rocks and locally covers Palaeogene karst bauxite deposits.
-
Thought to have diverged from other avian lines in the Late Cretaceous Period, the colorful animal can measure five feet tall from its helmetlike casque to its daggerlike foot spurs, and it weighs up to 125 pounds.
-
Hence, fundamental differences in the available datasets hinder an in-depth comparison of mid-Cretaceous with Pliocene to Quaternary black shale successions.
-
Virtually all of the common major groups of theropods and ornithopods typical of the Late Cretaceous of northern North America are present.
-
It represents a remarkable find because partial skeletons of mosasaurs from the Late Cretaceous marine strata exposed along the Atlantic coast from New Jersey to the Carolinas are rare.
-
The Cretaceous was thus the time in which life as it now exists on Earth came together.
-
Protohadros was a large ornithopod native to Texas, living at the very end of the Early Cretaceous period, right before the big extinction in the Turonian that knocked off the stegosaurs, a lot of the pterosaurs, and others.
Life's Time Capsule: Thoughts on Palaeoart II
-
Overlying the Jurassic succession, a thin sequence of basal Cretaceous strata including the Greensand is characterized by radial outward dips.
-
A feather with possible ectoparasite eggs from the Crato Formation (Lower Cretaceous, Aptian) of Brazil.
The war on parasites: an oviraptorosaur’s eye view
-
Quartz veins are abundant throughout the property and most appear to be related to Cretaceous deformation of the country rocks.
-
The Jurassic or first part of the reptilian time shades insensibly into the second part, called the Cretaceous, which immediately follows it.
Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky
-
The barite and calcite form excellent euhedral crystals in concretions within the Cretaceous-age Mancos Shale.
-
The last dicynodont: an Australian Cretaceous relict.
Archive 2006-05-01
-
He says that dinosaur specimens from late Cretaceous rocks reveal low predator/prey ratios of from 3 to 5 percent.
-
Divergence times for major culicid lineages date to the early Cretaceous.
BioMed Central - Latest articles
-
Carboniferous to Cretaceous strata are exposed in an extensive series of outcrops along the east coast of Greenland.
-
Middle Triassic anhydrite and dolomite form a sequence of strong reflectors, as does Lower Cretaceous sandstone.
-
Thick Permian to Cretaceous continental rise deposits merge southward into a continuous Ordovician to Eocene shelf sedimentary succession of marine carbonate, sandstone, siltstone and shale.
-
Echinoids are among the most conspicuous and diverse constituents of the Upper Cretaceous and Paleocene marine invertebrate fauna of Argentina.
-
The assumption, as is often the case with this cretaceous era of computer software, is that someone else has loused it up for them.
-
Currie PJ (2000) A new carnosaur (Dinosauria: Theropoda) from the Lower Cretaceous of Japan.
PLoS ONE Alerts: New Articles
-
Cretaceous and lower Palaeocene sediments partly covered by Palaeocene-Eocene picritic and basaltic lavas are exposed in the Nuussuaq Basin on the island of Disko and the peninsulas of Nuussuaq and Svartenhuk.
-
However, a true concordant relation between the uppermost Jurassic and the lowest Cretaceous sequences is in principle only found locally, and is restricted to the deepest parts of the basin.
-
They found the rare element iridium in the thin clay layer that caps the rocks of the Cretaceous era.
-
Partly because of my reading-up on other areas of direct interest (like cryptic diversity [see previous post], the discovery of new species, declines in global biodiversity, Cretaceous biogeography, radical homoplasy, polymorphism, and evolutionary reversals), I am returning again and again to the salamander literature.
Archive 2006-03-01
-
The page includes a nice photo of a Cretaceous insect in amber.
-
In any case, most if not all Triassic scleractinians, whether zooxanthellate or not, show skeletal construction different from modern (strictly post-Cretaceous) equivalents.
-
The genus Pteranodon includes several species of large pterosaurs from the Cretaceous period in North America.
-
The next long era, termed the Cretaceous, was likewise more remarkable for slow accumulation of rock under the sea than for the formation of new land.
Geographical Evolution
-
The Homolidae first appeared during the Jurassic, and by the Cretaceous was well established in oceanic and epicontinental regions.
-
The Murihiku Terrane is one of several Permian to early Cretaceous tectonostratigraphic terranes comprising the basement underlying New Zealand.
-
During the Cretaceous and the Tertiary periods large parts of the present subcontinent of India were flooded by multiple lava flows.
-
This, the last period of dinosaurian evolution, was also the period of their greatest diversity, although only a fraction of the types (mainly latest Cretaceous Western North American and Asian forms) are known.
-
From his first, perhaps best book, "The Immense Journey," he showed a gift for transporting his readers across aeonic expanses—evoking the "croaking gloom of carboniferous swamps" and "the surf on Cretaceous beaches where now the wheat of Kansas rolls.
Dispatches From the Natural World
-
The Jurassic and Cretaceous together were the age of giant reptiles.
-
Like the Northwest Flank Fault, the Bala Fault was reactivated during Cretaceous and Neogene inversion with compressional strain restricted mainly to right-stepping jogs along the fault.
-
Also, we have another tiny, new dinosaur, the smallest carnivorous yet known from North America, Hesperonychus elizabethae, a 19-inch tall theropod from the Late Cretaceous of Alberta, Canada.
"So lose some sleep and say you tried."
-
Gently undulating plains on Cretaceous sediments surround the floodplains, often with a duricrust forming a dense gravel or rock (gibber) surface pavement.
Simpson desert
-
As such, they have been found fossilized in Jurassic and Cretaceous deposits, and have been used to reconstruct paleoclimates.
-
Mid-Cretaceous faulting is observed along the Ran ridge, whereas the axis of the Paleocene rifted zone is shifted slightly further to the west in the Voring margin.
-
The ultramafic rocks are probably Jurassic or Cretaceous in age, and constitute a spoon-shaped lopolith with a dunite feeder plug at the east end.
-
Pre-Cretaceous basinal rocks also occur on the northern margins.
Eastern Guinean forests
-
Early ammonoids or goniatites may have simple zig-zag sutures, but they become increasingly complex from the Triassic to the Cretaceous.
-
Extracts of material from New Zealand dating back to a meteor impact 65 million years - during the Cretaceous-Tertiary, K-T - period were thought to contain fullerenes because of intriguing peaks in their chromatograms.
-
Reactive diapirism in Lower Jurassic shales may have contributed to the formation of a central uplift at base Cretaceous level.
-
And some fossil catfishes, lungfishes, and characins date back to the Late Cretaceous, 70 million years ago.
-
During the late Cretaceous and early Paleocene periods plant-eating mammals were frugivores, presumably because fruit can be more easily processed than foliage.
-
It was the spectacular array of ornithischians that made the Cretaceous such an interesting time - strangely named beasts like ‘duckbills’ and ‘boneheads’, and various types of armoured and horned dinosaurs.
-
This trend is evident at a coarse scale in a comparison of the combined rarefaction curves for sites from the uppermost 15 m of the Cretaceous against all Paleocene sites.
-
He says that dinosaur specimens from late Cretaceous rocks reveal low predator/prey ratios of from 3 to 5 percent.
-
Terrestrial deposits contain fossils ranging from Paleocene leaf imprints to Cretaceous dinosaur remains.
-
Plants with flowers and leaves (phanerogams and Latifoliae) appeared no earlier than the Cretaceous - in other words about 100 million years ago, long after the first protophasmids.
-
Overlying the Jurassic succession, a thin sequence of basal Cretaceous strata including the Greensand is characterized by radial outward dips.
-
Extensional faults are planed by a regional unconformity that is overstepped by Permian to Cretaceous strata.
-
Aphids, grasshoppers, and gall wasps appear in the Cretaceous, as well as termites and ants in the later part of this period.
-
The envelope consists of garnet gneiss, migmatite, sillimanite gneiss, fibrolite schist, andalusite schist and quartzite, phyllite and unmetamorphosed Palaeozoic to Cretaceous sedimentary rocks.
-
It may be as sharp and as striking as the stratal layer that marks the death of the dinosaurs, at the end of the Cretaceous Period.
Comments for OUPblog
-
First described for a partial snout from the Brazilian Santana Formation, Tupuxuara longicristatus Kellner & Campos, 1988 is a toothless Cretaceous pterosaur with a rather long, subtriangular skull.
Those sexy tupuxuarids
-
At late Cretaceous, resulting from transgression from west to east in Southwestern Tarim Basin, continental clasts decreased eastwardly, while marine facies took dominance.
-
Middle Triassic anhydrite and dolomite form a sequence of strong reflectors, as does Lower Cretaceous sandstone.
-
The Cretaceous rhyolite - porphyry is the main parent rock Of the deposit , extending inNE - orientation.
-
On the plateau the stripping away of most of the late Cretaceous rocks has produced a rugged landscape of resistant, flat-bedded quartzose sandstones, criss-crossed by weaker areas that have been deeply eroded into a maze of narrow valleys and gorges.
Kakadu National Park, Australia
-
Although an apparent explosion of dinosaur diversity occurred in the mid-Cretaceous, coinciding with the emergence of new groups e.g. neoceratopsians, ankylosaurid ankylosaurs, hadrosaurids and pachycephalosaurs, results from the first quantitative study of diversification applied to a new supertree of dinosaurs show that this apparent burst in dinosaurian diversity in the last 18 Myr of the Cretaceous is a sampling artefact.
Neoceratopsian publications for 2008
-
It is worth noting the similarities and differences between the Early Cretaceous rifted continental margin evolution of the West Peruvian Trough and the contemporaneous evolution of this Chilean Coastal Range segment.
-
I read two articles in the May 2010 Journal of Vertebrate Paleontology, "Allodaposuchus Nopsca, 1928 (Crocodylia, Eusuchia), from the Late Cretaceous of southern France and its relationships to the Alligatoroidea" and "Pachycephalosauridae from the San Carlos and Aguja Formations (Upper Cretaceous) of West Texas, and observations of the frontoparietal dome.
Subject lines are for the faint of heart.
-
Fritsch briefly described two specimens from the Cretaceous of the Czech Republic that he identified as chilopods, one a possible lithobiomorph.
-
Today's bullies of the Serengeti plains, lions and spotted hyenas, were paralleled by tyrannosaurs in Jurassic and Cretaceous ecosystems.
-
There are two main types, the dome heads and the horned dinosaurs, which evolved from a common ancestor during the early Cretaceous.
-
A distant relation of Halorella, called Peregrinella, is even more remarkable in early Cretaceous rocks.
-
The early Cretaceous is characterized by relative quiescence and thermal subsidence following late Jurassic rifting.
-
After the end of the Cretaceous, the birds and mammals radiated strongly for about another 10-20 million years.
-
The evolution of nectaries in late Cretaceous flowers signals the beginning of the mutualism between hymenopterans and angiosperms.
Pollination
-
At sometime in the later part of the Cretaceous period the first breaks took place, changing the structure of the range from symmetrical to monoclinal and outlining the present form of the Sierra Nevada.
The Lake of the Sky Lake Tahoe in the High Sierras of California and Nevada, its History, Indians, Discovery by Frémont, Legendary Lore, Various Namings, Physical Characteristics, Glacial Phenomena, Geology, Single Outlet, Automobile Routes, Historic Town
