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Geology > Sedimentary Rocks > Flashcards

Sedimentary Rocks Flashcards

1
Q
  • Laminated of fissile clastic sedimentary rock
  • composed of silt and clay, and other materials, especially quartz and calcite
  • Depositional environment: flood plain, lake, mid continental shelf, delta tidal flat, lagoon, or deep marine
A

Shale

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2
Q

What sedimentary rock is composed of poorly sorted, well rounded clasts?

A

Conglomerate

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3
Q

What rock is composed of poorly sorted, angular clasts?

A

Sedimentary Breccia

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4
Q

What rock is composed almost entirely of clay-sized clasts, but is not fissile?

A

Claystone/Mudstone

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5
Q

What fissile rock is composed almost entirely of clay-sized clasts?

A

Shale

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6
Q

What rock is composed of at least 90% sand-sized quartz grains?

A

Quartz Sandstone

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7
Q

What rock is composed of sand-sized grains, at least 20% of which are angular and non-quarts?

A

Greywhake Sandstone

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8
Q

What rock is composed primarily of sand-sized grains at least 20% of which are feldspar in composition?

A

Arkose Sandstone

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9
Q

What is the name of a sedimentary rock composed of calcium sulfate –CaSO4?

A

Rock Gypsum

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10
Q

What is the name of a sedimentary rock composed of sodium chloride–NaCl?

A

Rock Salt

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11
Q

What is the name of a sedimentary rock that contains red layers of iron oxides, such as hematite (Fe2O3)?

A

Banded Iron Formation

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12
Q

What is the generic name of a sedimentary rock is composed of Calcium Carbonate (CaCO3 )?

A

Limestone

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13
Q

What is the name of a sedimentary rock is composed of wavy bands of Calcium Carbonate (CaCO3 )?

A

Travertine Limestone

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14
Q

What is the name of a sedimentary rock composed of rounded ball of Calcium Carbonate (CaCO3 )?

A

Oolitic Limestone

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15
Q

What is the name of a sedimentary rock composed almost entirely of shell fragments?

A

Coquina Limestone

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16
Q

What is the name of a sedimentary rock composed of powdered calcium carbonate shells of microscopic marine organisms?

A

Chalk

17
Q

What is the name of a sedimentary rock composed of silica (SiO2)?

A

Chert

18
Q

What is the name of a sedimentary rock composed of carbonized plant matter?

A

Bituminous Coal

Geology (2 decks)

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