Sedimentary Rock Identification and Composition Quiz

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<p>Between 1/16 and 2 mm (A)</p> Signup and view all the answers

<p>Greater than 2 mm (D)</p> Signup and view all the answers

A type of sedimentary rock formed from fragments (clasts) of pre-existing rocks and minerals.

Particles, minerals, or rock fragments in clastic rocks, categorized into clay/silt, sand and gravel, based on size.

Less than 1/16 mm. These are the finest-grained components of clastic rocks, often forming mudstones or shales.

Between 1/16 mm and 2 mm. These particles are larger than clay and silt, commonly forming sandstones.

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Greater than 2 mm. These are the largest clasts, including pebbles, cobbles, and boulders, forming conglomerates or breccias.

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Conglomerate, a type of sedimentary rock, contains clasts, which are fragments of pre-existing rocks.
Clastic sedimentary rocks are classified based on the size of their clasts, with clay being the smallest (less than 0.0625 mm in diameter).
Silt, another clast size, ranges from 0.0625 mm to 2 mm in diameter.
Clastic sedimentary rocks are also divided into three composition categories: conglomerate (large clasts), sandstone (sand-sized clasts), and shale (clay-sized clasts).
Sand, a common clast size, ranges from 2 mm to 0.0625 mm in diameter.
Gravel, the largest clast size, consists of particles larger than 2 mm in diameter.