How To Use Breccia In A Sentence
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The sub-horizontal fissures in the breccia are infilled with laminated shale of identical lithology to the overlying basal bed of the Blue Lias Formation.
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Howardites are polymict breccias composed of angular clasts of eucrites and diogenites welded together by pulverized mineral dust.
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It weights 751 grams and consists of breccia - sintered fragments of various minerals from lunar continents.
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Galena is also found as larger isolated octahedral crystals within the coarse calcite cement in breccias in the upper parts of the core.
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Is it all this broken-up breccia or is there, maybe, a big old finger of basalt sticking up that we could scramble right on down?
THE FALLEN MAN
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A related group of achondrites, called mesosiderites, are brecciated and metamorphosed.
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Here colorless to yellow crusts of mimetite coat open spaces and coarse fragments in brecciated dacite.
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Test tell us that cell pressure can enhance Gypsum Breccia's anti - damage strength.
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The diamond-bearing lamprophyre breccia is coincident with a crudely circular magnetic low as defined by an airborne magnetic survey.
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In this core, a 100m thick impact breccia underlies 50 cm of bedded dolomitic limestone with diverse planktic foraminiferal assemblages of zone CF1 that spans the last 300 ka of the Maastrichtian.
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They consist of intrusive materials (phonolitic domes, trachytic dykes, small syenitic bodies), breccias, tuffs and massive peripheral lava flows.
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Follow up work will focus on assessment of priority kimberlite targets and additional evaluation of the most prospective of the lamprophyre breccias.
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The ironstone is locally represented by hematite matrix-supported vein quartz breccia.
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The mudstones are dark and contain calcareous concretions, the latter brecciated and with calcareous veins.
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It may also be called a breccia, for it is composed of black fragments, larger or smaller, derived from other rocks, whose angular shape indicates that they have not travelled far from the spots where they occur.
Roman Mosaics Or, Studies in Rome and Its Neighbourhood
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Further up the core into the Waulsortian sequence, the limestones are cleaner and the breccia clasts are cemented by calcite.
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Eventually only a hollow lined by residual soils above a breccia chimney marks the site of a former salt extrusion.
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The limestone-dolomite breccia is characterized by abundant palygorskite, minor sepiolite, rare kaolinite and near absence of smectite.
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In some breccia zones the rock fragments exhibit partial melting and reaction rims.
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Breccias are associated with mechanical weathering in regions of high tectonic activity.
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The preponderance of early cementation and brecciation (in thin beds) towards the top of the Langport Member is compatible with reduced sedimentation rate (resulting from deepening and sediment starvation).
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The occurrence is in coarsely brecciated dolomite at the margin of a previously mined-out area in pillars and on the walls of a stope where the early work had ended.
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Mineralization consists of quartz-albite-calcite veining with disseminated pyrite, pyrrhotite and arsenopyrite hosted in pervasively silicified, brecciated siltstone and wacke.
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The first, above, is nearly dip-slip in relative movement, and you can see a close-up of the footwall breccia.
Friday Fault Photos
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Vortex gold and silver mineralization is associated with a volcanic rock hydrothermal breccia and the silver mineralization is primarily contained within the mineral pyrargyrite.
Allied Nevada Drills 166 Meters Grading 1.51 g/t Gold Equivalent at Hycroft - Yahoo! Finance
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Orebodies in the fissure veins and both rock types were formed by hot water solutions moving upward and laterally along fractures and fault zones, brecciated amygdaloidal flow tops, and permeable conglomerate beds.
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The thrust zone displays significant brecciation although no slip planes were located.
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This calcrete can be three meters thick and looks like a breccia.
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brecciate rock
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Unbrecciated diogenite that shows orthopyroxenes and chromite grains that are partially fragmented and deformed.
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The diorite is brecciated, strongly altered and has undergone mylonitization.
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Intrusive breccias can be the host for metallic ore deposits and aesthetic mineral specimens.
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Brecciated and sheared ironstones were exploited for gold at several localities in the Mafic Formation.
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Below this were strata of trachitic breccia and augite; the formation was then seamy to an unknown depth.
Scientific American Supplement, No. 392, July 7, 1883
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Some 600 m below this breccia the pluton is pervaded by a fine-grained granophyre, apparently the product of a sudden and final crystallization.
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The breccia is interpreted as a turbiditic debris layer, typical of the outer edge of the slope.
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The ironstone is locally represented by hematite matrix-supported vein quartz breccia.
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The mafic sheets have not contributed at all to the felsic volcanic-derived volcaniclastic breccias, thus supporting an intrusive origin for the mafic volcanic rocks.
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These eruptions deposited pebble-grade volcaniclastic breccias of an intermediate composition within a few kilometres of the Rio Tinto Anticline.
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- Moreover, a zone of lamprophyre dykes and lamprophyric breccias has been delineated within a
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Movement along the vein resulted in a breccia that was cemented by additional quartz and prehnite along with copper mineralization.
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The paucity of outcrop in the Acraman depression indicates that the bedrock beneath the depression is strongly disrupted by brecciation and jointing.
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This distribution defines an antithetic relationship between breccia facies in the red mudrock sequences and stratiform mineralization.
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The field relationships and geochemistry is described in detail by Fumes & Lippard, who differentiated a lower body of brecciated flow-banded and ‘flow-folded’ trachytic lava, interlayered with microgabbro.
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Locally, intense brecciation gave rise to angular vein quartz fragments enveloped by a matrix of massive hematitic rock.
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Many beds of siliceous gravel are cemented together by a siliceous cement, and are called breccia; as the plumb-pudding stones of
The Botanic Garden A Poem in Two Parts. Part 1: the Economy of Vegetation
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Berriedale Water, (3) the brecciated conglomerate largely composed of granite detritus seen at Badbea, (4) red sandstones, shales and conglomeratic bands found in the Berriedale Water and further northwards in the direction of Strathmore.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"
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There are two gold targets that have been modeled for these claim blocks; one a shallow vein/structure such as mineralized quartz veins and breccia zones located in the volcanic rocks that cover much of the property and deep seated Carlin trend type gold deposits located in the lower plate rocks.
Ironwood Gold Completes Mobile Metal Ion Survey at Rock Creek Project, Nevada - Yahoo! Finance
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Early-stage hydrothermal leaching of the limestone created solution cavities and brecciated zones along the fissures and faults, providing sites for subsequent ore deposition.
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The cranium was met with at a depth of a metre and a half [five feet nearly], hidden under an osseous breccia, composed of the remains of small animals, and containing one rhinoceros tusk, with several teeth of horses and of ruminants.
Essays
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It can be found in fissure veins and brecciated amygdaloidal basalt lodes but not in the conglomerate lodes.
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As the San Francisco Chronicle reports: Steve Squyres, a Cornell astronomer and the rover's chief scientist, said Thursday that the rugged rock is a form of breccia, jumbled fragments of minerals cemented together and apparently thrown up from beneath the planet's surface by some monstrous impact that happened millions - or perhaps billions - of years ago.
James M. Gentile: Innovations In Space Technology Are Still Key
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A breccia is a rock made up of angular pebbles or fragments of other rocks.
Roman Mosaics Or, Studies in Rome and Its Neighbourhood
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brecciated rock
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The ore body is brecciated and may represent the filling of a volcanic neck or pipe.
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It is from the superficial covering, the thin crust with which the earth is covered, composed of the remains of former existence, of the breccia of exhausted nature, that animal creation derives its support; and it is the grand axiom of the universe, that _animal life can only be supported by animal remains_.
The King's Own
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Outcrops of the Leadville Limestone at the south end of Main Street contain vugs of quartz crystals that have cemented brecciated limestone.
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The composition of the lode is similar to that of the Isle Royale lode and consists of fragments of the oxidized brecciated flow top cemented by quartz, calcite, prehnite, and epidote.
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Development of pillow breccia probably occurred along the scarps of normal faults in this extensional setting.
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I am afraid that -- what between squeezing and heating -- she would flatten us all out into phosphatic fossils, about an inch thick; and turn Winchester city into a "breccia" which would puzzle geologists a hundred thousand years hence.
Madam How and Lady Why
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Uranium mining in the geologic formations known as breccia pipes that abound in the area around the Grand Canyon did occur during the 1980s but diminished as the prices dropped.
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Massive dolomite and dolomitic breccias are separated by a normal fault from the upper part of the sequence.
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There, fault planes parallel to the fjord display red coloration, red cataclasite in zones up to 10 cm thick, and wide zones of unconsolidated breccia or gouge.
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The lower series consists of alternating basalt lava, tuff breccia, tufite, and siliceous rock, whereas the upper one is dominated by diabase.
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The volcanic necks are composed of basic rocks, basalt, basalt breccia, or andesite, showing considerable variation in mineralogy, texture, and structure within the same neck.
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Native copper and a host of gangue minerals were deposited in fissure veins, brecciated and fractured vesicular lava flow tops, and conglomerate beds during the same period of metal mineralization.
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Basement rocks consist of Tortonian volcanic rocks unconformably overlain by Messinian (uppermost Miocene) marine marls, coral-reef limestones and carbonate breccias.
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All holes at Santo Nino encountered broad zones of well developed silicified breccias with widespread pyrargyrite
The Earth Times Online Newspaper
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In these types of deposits, gold and silver are precipitated by hot springs in fissures, faults, and explosive breccias in the upper portions of the mineral system.
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Brecciated ironstone is derived from the disruption of banded ironstone with which it is intercalated.
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A volcanic or igneous breccia forms during eruptive activities.
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The lower series consists of alternating basalt lava, tuff breccia, tufite, and siliceous rock, whereas the upper one is dominated by diabase.
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These are found in granitic rocks forming the core of the high Cordillera Real and in the adjacent intruded sediments, in narrow fissure veins and broader brecciated zones containing the typical ore and gangue minerals described above, and also, in many cases, silver-bearing sulphides (chiefly tetrahedrite).
The Economic Aspect of Geology
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The second fault, below, shows oblique-slip slickensides, and beneath the slickensides, in the footwall, are some calcite masses and a footwall breccia.
Friday Fault Photos
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Along these exposed fault scarps, 500 m or more high, not only can the nature of oceanic crust be examined, but complex patterns of fault breccias, talus, and lavas can be discerned.
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In some cases rare stone types, such as breccia corallina, cipollino marina and some as yet unidentified stone types were used.
Interactive Dig Sagalassos - Stone Report 1
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Squeezing through the narrow walls -- some are smooth marble, others multicolored rock fragments called breccia that appear to be cemented together -- the forces that carve and polish Mosaic Canyon with each passing storm are easy to appreciate.
MercedSun-Star.com: front
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This would best be done by careful engineering - geological mapping of rock exposures, recording dip and direction of joints and faults and noting areas of brecciation and serpentinisation.
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Keller et al. (2004a,b) demonstrated that the impact breccia and the K-T boundary are separated by a 50 cm interval of sediments that contain (1) five thin glauconite clay layers, each of which represents deposition over tens of thousands of years, thus incompatible with tsunami or backwash deposition?
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
