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14 Cards in this Set
- Front
- Back
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Composition: Biochemical/bioclastic—microfossils
Texture: No visible grains/may contains microfossils in the micrite---form of limestone and is a carbonate rock ETC: does react to HCL/ Environment: forms in Lagoon with calcareous algea. Formed by the recrystallization of lime mud |
MICRITE
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Micrite
Composition: Biochemical/bioclastic—microfossils Texture: No visible grains/may contains microfossils in the micrite---form of limestone and is a carbonate rock ETC: does react to HCL/ Environment: forms in Lagoon with calcareous algea. Formed by the recrystallization of lime mud |
MICRITE
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Breccia
Composotion: Detrial/siliciclastic /clastic Texture:angular/poorly sorted gravel/feldspar and quartz grains ETC: weathering of preexisting rock, not transported far---grains were mixed and hardened. Environmnet: Stream/glacial gravel |
BRECCIA
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Calcarenite
Composition: biochemical/bioclastic/clastic Texture: mostly sand-sized shell fragments: often contains a few larger whole fossil shells ETC: form of limestone and reacts to HCL –carbonate rock environment: shell sand formed in mid to deep water! |
calcerite
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Chert*****
Composition: chemical rock/ Microcrystalline/inorganic/siliceous rock Texture: Microcrystalline, hard (scratches glass) usually grey. ETC: Environment: derived from dissolution of siliceous phytoplankton ooze (diatoms, radiolarian) |
chert
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Chert*****
Composition: chemical rock/ Microcrystalline/inorganic/siliceous rock Texture: Microcrystalline, hard (scratches glass) usually grey. ETC: Environment: derived from dissolution of siliceous phytoplankton ooze (diatoms, radiolarian) |
chert
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Lithic Sandstone
Composition: Detrital/clastic Texture: mostly rock fragment sand gritty and well sorted ETC: may contain fossils/form of sandstone environment: derived from the mechanical and chemical weathering of land rocks, which consist mostly of silicate minerals. Sand dunes/ turbidity flow/ stream sand |
Lithic sandstone
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Shale
Composition: Detrial/clastic Texture: very very small grains/hard to see/mostly clay/may contain fossils—fissile (splits easily into layers) ETC: form of mudstone environment: derived from the mechanical and chemical weathering of land rocks, which consist mostly of silicate minerals. Marsh and floodplain mud with plants/mud/ marine mud with marine shells |
SHALE
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Conglomerate
Composition: Detrial/clastic Texture: mostly subround and/or well rounded gravel (grains larger than 2 mm) ETC: rock fragments/quartz grains/feldspar/clay minerals Environment: gravel/stream gravel/glacial gravel |
conglomerate
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Arkose
Composition: detrital/clastic poorly sorted grains Texture: mostly sand grains/may contain fossils mostly feldspar and quartz ETC: form of sandstone environment: streams/beach sand or gravel sand dunes/ |
arkose
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Coquina
Composition: biochemical/clastic/bioclastic Texture: mostly gravel sized shells and shell or coral fragments ETC: form of limestone/reacts to HCL/carbonate rock Environment: shell gravel found in ridge off coast of land slop |
coquina
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Bituminous Coal
Composition: biochemical/bioclastic/Clastic plant fragments and or charcoal Texture: black, layered, brittle rock, may be sooty or bright ETC: environment is peat bog |
bituminous coal
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Oolithic Limestone
Composition: chemical/inorganic/nonclastic calcite crystals and/or calcite spheres and/or microcrystalline calcite/aragonite Texture: mostly spherical grains that resemble miniature pearls called ooliths ETC: reacts to HCL/carbonate/form of limestone Environment: Ooid shoals |
oolithic limestone
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Shale (looks different than normal shale)
Composition: Detrial/clastic Texture:very very small grains/hard to see/mostly clay/may contain fossils—fissile (splits easily into layers) ETC: form of mudstone environment: derived from the mechanical and chemical weathering of land rocks, which consist mostly of silicate minerals. Marsh and floodplain mud with plants/mud/ marine mud with marine shells |
different form of shale
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