How To Use Stratigraphy In A Sentence
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Correlation of the two regions (Wales and Spain) is achieved by ammonite biostratigraphy; however, the correlation is complicated by diachrony in the ammonite zones, especially around the Pliensbachian / Toarcian boundary.
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A mission involving three gliders would explore the composition and stratigraphy of the walls of Valles Marineris in ways not possible for orbiters and landers.
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Crism also will map the geology, composition, and stratigraphy of various Martian surface features.
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Perhaps nowhere else in the literature is the integration between field stratigraphy, paleoecology, and paleobiology better illustrated than in this research.
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The ophiolite contains a complete igneous stratigraphy of serpentinized ultramafics, gabbro, sheeted dykes and pillow lavas, as described by Moores.
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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.
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Strong uniformity in Permian ammonoid biostratigraphy and provincialism between Xinjiang and Pamir is suggested.
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The study has also resulted in a clearer picture of the biogeography and biostratigraphy of the Monophorasteridae, and their great significance in the evolution of lunulate sand dollars in the Americas.
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Although Lower Cambrian stratigraphy remains in a state of some uncertainty, therefore, it is possible at present to present a provisional view of the sequence of events in at least some areas of the world.
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If people are making policy recommendations based on finds of peat at glacier margins, it seems a matter of common sense that one would want a report on the stratigraphy by a geologist or glacial geomorphologist.
Some Geologists at Quelccaya « Climate Audit
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Jack worked in many different areas of vertebrate paleontology during his long career, but he is best known for his pioneering research on the Tertiary mammals and biostratigraphy of west Texas and Mexico.
John A. Wilson, 1914 - 2008
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This should be achieved by independent stratigraphic methods such as magnetostratigraphy or, where possible, marine biostratigraphy.
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The sixty pages on palaeontology emphasize geology and stratigraphy and chiefly illustrate trilobites.
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The SEPM constitution made it clear that the ‘object of the Society is to promote the science of stratigraphy through research in paleontology and sedimentary petrography, especially as it relates to petroleum geology’.
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To return to our example, the usual biostratigraphic markers in Middle Paleozoic stratigraphy are graptolites, conodont ‘jaw’ parts, and thelodont scales.
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After publication of the palaeomagnetic results, other field studies have supported this hypothesis on the basis of palaeontology and stratigraphy and matching of Devonian palaeocurrents and structural patterns.
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I challenged him specifically on the question of biostratigraphy and the successional order of appearance of the various forms of life in the fossil record.
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The up-to-date stratigraphy and earlier radiometric dates on these and other Late Precambrian rocks of this area are given in Pharaoh & Gibbons.
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This unique succession of ammonoid assemblages allows unequivocal recognition of European substage-level chronostratigraphy across the mid-Carboniferous boundary interval in North America for the first time.
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These chapters are required reading for anyone interested in how rigorous biostratigraphy should be done with any fossil group, not just mammals.
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A stone's throw from the traffic and diversity of nearby Arusha, Tanzania, a village community -- what we might call neighborhood -- is preserved in the distinctly non-urban, tribal traditions which overlay the foundational stratigraphy of East Africa.
Charles R. Wolfe: Envisioning the Blend: Tradition, Tourism and Sustainability
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Recent developments in Pleistocene stratigraphy have enabled a better correlation to be made of terrestrial sequences with the much more complete marine sequences.
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Despite his expanding interest in biological questions, Weller remained a strong proponent of stratigraphy and practical geology, both in the classroom and in research.
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In many depositional basins, biostratigraphy is a key element in developing play concepts and planning for production wells.
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This is the basic unit of biostratigraphy in which fossils are used in the correlation of rock units.
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The accepted stratigraphy of the Dalradian block is presented in Figure 1.
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An organic-rich shaly horizon of this age can be traced into continental Europe and possibly into North and South America; the stratigraphy suggests regional transgression and deepening.
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This generation of archaeologists had borrowed the concept of stratigraphy, meaning “stratification,” from geologists who used the term to describe the strata that made up the earth’s crust.
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These are also the areas in which the traditional use of invertebrate macrofossils in biostratigraphy and paleogeography offers the potential for resolving major geological debates.
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A Pliocene age for the Siesta palaeosol and Nothofagus fossils has been inferred from diatom and palynological biostratigraphy.
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Foraminiferal biostratigraphy and paleoenvironmental reconstruction at Yaxcopoil-1 drill hole Chicxulub crater, Yucatan Peninsula.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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The water depths used for this calculation were established by adopting the pattern of relative sea-level variations inferred from sequence stratigraphy.
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The latter itself is too young to denote the original age of the tuff, on the basis of its Early Cambrian biostratigraphy and independent ages for the Early Cambrian elsewhere.
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Much is now known about the stratigraphy and palaeobiogeography of this biota through current interest in the definition of the base of the Cambrian System.
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Is Smit really so out of it with the current status of biostratigraphy?
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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Previous studies of coal sequence stratigraphy have concentrated on coals associated with siliciclastic depositional systems.
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Much research has been of interest to, and sponsored by, the petroleum industry, and many facets of the research are as significant to stratigraphy and basin analysis as to palaeobiology
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The sixty pages on palaeontology emphasize geology and stratigraphy and chiefly illustrate trilobites.
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The drilling of nine cored boreholes, including a deep hole to a gabbroic basement, in the vicinity of the Rhyme chert locality has resulted in a major revision of the structure and stratigraphy of the area.
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In dating these events, detailed correlation and detailed (high-resolution) biostratigraphy is essential.
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Numerous regional schemes rationalizing the nomenclatural stratigraphy of the critical time have been developed, and a variety of biostratigraphic zonations evolved.
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These are also the areas in which the traditional use of invertebrate macrofossils in biostratigraphy and paleogeography offers the potential for resolving major geological debates.
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It's an Archaic Stage site spanning the period 7500 BC through to AD 1200 in fourteen distinct cultural horizons represented by over 10.5m of stratigraphy.
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It explains the facts of biodiversity, biostratigraphy, comparative anatomy, and so forth.
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In marine sediments marine phytoplankton (floating plants) are widely used in biostratigraphy.
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The new age for the Botany Bay Group provides an important tie point for Jurassic floras in the Southern Hemisphere that will allow a more robust biostratigraphy to be constructed.
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Since the presence of these cells would be tied directly to important geochemical events, they would make ideal organisms for biostratigraphy.
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This site is dated by biostratigraphy to the early Pleistocene, with an estimated age of 1.3 + or - 0.1 Ma.
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In the final section Bosence and Wilson discuss the complexities of sequence stratigraphy in carbonate settings and introduce the use of numeric stratigraphic modeling for facies prediction.
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The technical name for these layers is strata, and the careful study of them is called stratigraphy.
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Oscillating reactions are thought to play key roles in biological morphogenesis and geologic stratigraphy.
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A series of new findings are now available, which permit the general Jurassic stratigraphy of Jabal Akhdar to be significantly refined.
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For details of reflection characteristics, especially in the Mesozoic stratigraphy, the reader is referred to the literature cited above.
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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.
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The nine cored boreholes, four of which encountered chert beds, provide evidence of the stratigraphy, structure, palaeontology and depositional setting of the Rhynie and Windyfield cherts.
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This paper, in terms of sequence stratigraphy and sedimentary dynamics dynamic evolution of Xichang Compound Basin.
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The late Mesozoic and Cenozoic stratigraphy of northern Chile is shown in Figure 3.
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TOPO/GRAPHY | An exhibition that investigates the mapping of the relief, stratigraphy and history of land.
Bill Bush: Distinct of a Decade and Definitive of an Era: This Artweek.LA (June 27-July 3)
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Acritarchs continue to be used in studies of Proterozoic paleoecology and stratigraphy, even though their systematic affinities are still not well understood.
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Keith Young published over 100 papers and contributed to numerous symposia and field guides dealing with Mesozoic biostratigraphy.
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Johnson, in 1953, studied its lithology and stratigraphy, and in 1958, its paleontological features.
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Tertiary stratigraphy throws considerable light on landform and river development.
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Keith Young published over 100 papers and contributed to numerous symposia and field guides dealing with Mesozoic biostratigraphy.
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We agree with Loydell that much of this testing will depend on the development of a more refined biostratigraphy and better correlations between sections worldwide, and we have common ground in working towards those ends.
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Inspiration is gained from the actions of the archaeologist, using stratigraphy as a recording practice, that records spacio-temporal paradigms.
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Biomarkers, first and last appearances of species and acmes, appropriately tested globally form the basis of biostratigraphy and age dating in conjunction with paleomagnetic and radiometric dates.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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The papers that follow concentrate on the integration of high-resolution geochemical records with detailed biostratigraphy.
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This is followed by a brief discussion of the methods for division of the stratigraphic record and geological time, with reviews of litho- and biostratigraphy, radiometric dating, magneto- and chemo-stratigraphy.
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The sixty pages on palaeontology emphasize geology and stratigraphy and chiefly illustrate trilobites.
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But unless you have already mastered vertebrate anatomy, Mesozoic stratigraphy, and phylogenetic analysis, it's probably not the place to begin.
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This agreement among biostratigraphers for the placement of the KT boundary in the Brazos section alone shows that evidently biostratigraphy works very well across different microfossil groups.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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Completing the exhibitions is a diorama of the geology of the area north of Johannesburg, the Magaliesburg area, that shows details of the region's topography, geology, and stratigraphy.
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In this study we concentrate on the field relations and stratigraphy of the pyroclastic deposits within the lower volcanics.
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Petro-Sonde modified for various weather and surface conditions emphasis placed on subsurface mapping with the Petro-Sonde lithologic contacts, structure and stratigraphy
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In this paper, we describe the use of spectral gamma-ray logs in testing and refining high-resolution stratigraphy in fluvial strata.
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He also questions the stratigraphy of the graben and the timing of north-south extensional tectonics.
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Despite the relatively coherent chronological stratigraphy demonstrated at the ice patches, temporal gaps are evident.
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The nine cored boreholes, four of which encountered chert beds, provide evidence of the stratigraphy, structure, palaeontology and depositional setting of the Rhynie and Windyfield cherts.
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Responding to Knight, he referred to stratigraphy as ‘the heart of geology’, and maintained that stratigraphy and paleontology were mutually dependent.
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As for biostratigraphy, the mass-extinction of foraminifers and nannofossils approximates the K/T boundary much more accurate.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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But even if these forms turn out to be true foraminifers – and Arz et al 2004 have shown that there are a few reworked specimens in that core interval – then those occur in a cross-bedded sandstone and are, therefore, by definition reworked, and cannot be used for biostratigraphy.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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Acritarchs continue to be used in studies of Proterozoic paleoecology and stratigraphy, even though their systematic affinities are still not well understood.
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Radiocarbon dating was still in the future, so archaeologists used relative methods of dating such as stratigraphy and stone tool typologies to deduce the age of a site.
Drawn to Archaeology
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The lavas have been divided into two main series (informally called the lower volcanics and the plateau basalts) based on their stratigraphy, geochemistry and petrography.
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Stratigraphy, then, was originally concerned with rocks, that is, lithostratigraphy; it soon afterwards included the ranges of fossils throughout the successions, biostratigraphy; and the more abstract chronostratigraphy.
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Comparable Pliocene palaeoclimatic fluctuations can also be seen in Southern Ocean silicoplankton records and marine isotopic records, and in seismic reconstructions of Antarctic glacial stratigraphy.
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Nearly three hundred years later, the rediscovery and elaboration of these principles would make possible modern stratigraphy and geological mapping.
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The San Juan Member is late Oligocene based upon biostratigraphy and radiometric dating.
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A combination of radar facies analysis and radar stratigraphy has been used to interpret the radar profiles and define a relative chronology.
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The sides of these trenches had the advantage of preserving the stratigraphy, but the baulks inevitably obscured parts of many of the features.
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The geologic setting and stratigraphy of the Cape Phillips Formation were noted by MacDonald.
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This initial stratigraphy is used as the platform to investigate the lava flow faciès distribution in more detail and from there to construct a 3D geological model of the lava field heterogeneity.
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The recognition of an orogenic unconformity at the base of the Easdale Subgroup allows for a more realistic overall interpretation of Dalradian stratigraphy.
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The overlying Pliocene reflections display a regular layer-cake stratigraphy of downwarped reflections defining a U-shaped depression.
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Perhaps nowhere else in the literature is the integration between field stratigraphy, paleoecology, and paleobiology better illustrated than in this research.
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In terms of regional chronostratigraphy of European Russia and Ukraine, this level is correlated with the Tsninian substage (or lower Kashirian substage) of the lower Moscovian stage, as defined primarily in the Moscow Basin.
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Several other interruptions within the Cenozoic stratigraphy of the Zagros region have long been attributed to epirogeny.
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The relative chronology derived from the radar stratigraphy clearly shows that the dune has migrated from east to west.
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The research integrates seismic interpretation, sedimentology and biostratigraphy from previously collected seismic data and piston cores.
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Such estimates of time-scale based on the stratigraphy of canyon fill will remain uncertain, however, until the nature of the fill is better understood.
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After publication of the palaeomagnetic results, other field studies have supported this hypothesis on the basis of palaeontology and stratigraphy and matching of Devonian palaeocurrents and structural patterns.
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to credit Lister with the first formulation of the basic principle of stratigraphy would be to bestow credit falsely
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At the museum, Cooper worked in contact with U.S. Geological Survey paleontologists whose concerns were brachiopods and Lower Paleozoic stratigraphy.
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Geologists can reconstruct these events by combining studies on the origins of rocks (petrology) and rock layering (stratigraphy) with the evolution of life (paleontology).
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A tentative correlation with a Tethyan reference carbon-isotope curve allows the provisional application of stage-level chronostratigraphy to the Wealden Group.
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More than any other fossil collector in the western New York area, Tom paid attention to the scientific aspects of paleontology, stratigraphy, and geology in general.
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During the prolonged debate over the boundary problem, further results on integrated magnetostratigraphy and ammonoid biostratigraphy were published, and additional palaeomagnetic measurements are in progress.
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Biomarkers, first and last appearances of species and acmes, appropriately tested globally form the basis of biostratigraphy and age dating in conjunction with paleomagnetic and radiometric dates.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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With the new discipline of stratigraphy to hand, geological maps of both practical and academic value could be, and were, produced by surveyors and scholars towards the end of the eighteenth century.
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The stratigraphy of Unit 2 is known only from stratigraphic reports that are mainly based on cutting analyses and petrophysical interpretation.
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These are set against the standard British Ordovician chronostratigraphy of Fortey et aL with the series boundaries calibrated as closely as possible to the chronometric timescale.
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The geologic age of the upper member of the Mal Paso Formation is constrained to the late Albian-early Cenomanian based on its stratigraphic position and biostratigraphy.
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He noted that he has published several articles with Lucas related to stratigraphy and biostratigraphy.
Archive 2008-03-01
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Due to the cave's deep, complex stratigraphy, the geological context of associated material culture has been particularly challenging to interpret.
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The geological mapping allowed a detailed revision of the regional stratigraphy.
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A second constraint on the timescale of canyon filling relates to the cyclic stratigraphy documented at the Umberatana syncline example.
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These rocks are generally divided into two major types in view of their lithology, internal stratigraphy and contact relationships with surrounding rocks.
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Lysons did not fully understand stratigraphy, and he mistook the date of the villa.
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Evol. 38, development of a high-resolution 0 to 300,000-year A20. chronostratigraphy.
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The volcanic stratigraphy, consisting dominantly of flood basalts with interbedded pyroclastic deposits, is well-exposed in East Greenland.
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Other remarks pertinent to its biostratigraphy appear in various works.
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Conventional sequence stratigraphy interpreting methods are only using convention seismic and well - logging data.
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The sills are structurally disrupted by the same tectonic features that imbricate other elements of the Bainang terrane stratigraphy.
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The ophiolite contains a complete igneous stratigraphy of serpentinized ultramafics, gabbro, sheeted dykes and pillow lavas, as described by Moores.
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The bulk of the collection is the result of research on biostratigraphy, taxonomy, and biology of protists and prokaryotes at U.C. Berkeley.
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Conversely, there is during this time interval a general scarcity of erupted igneous rocks that can be reliably tied into relative stratigraphy.
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The KT boundary was refined using a range of techniques such as stratigraphy & fossils, various radiometric techniques etc. - kinda like multi-proxies.
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