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GEOLOGY | ROCKS | SEDIMENTARY

Conglomerate

A coarse grained with rounded clasts that are greater than 2 mm in size.

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SANDSTONE

Formed of cemented sand grains (sometimes in a muddy matrix). Grain sizes between  63 μm and 1000 μm

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SILTSTONE

A lithified silt comprising grains between 4 μm and 62.5 μm.

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MUDSTONE

An Argillaceous or clay-bearing rock which is non-plastic and has a non-foliated, massive appearance.

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Limestone

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Chalk

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coal

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oil shale

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Bedded Chert

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EVAPORITE

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CONCRETIONS

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DOLOMITE

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