Sedimentary Rocks

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Texture (SSS) Image Drawing Cement / Sedimentary en. and
components (LS) structure
Conglomerat Grain size: Silica Beach / channel fill
e coarse
Shape:
well rounded
Sorting:
poorly sorted
Breccia Grain size: Iron oxide Alluvial fan /
Coarse floodplain
Shape: (flooding)
angular
Sorting:
poorly sorted
Greywacke Grain size: Silica or clay Deep sea
medium (turbidity currents)
Shape: flute casts, graded
sub-angular/ rounded bedding
Sorting:
poorly sorted

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Arkose Grain size: Silica Floodplain
medium ­ coarse dune bedding
Shape:
sub-angular
Sorting:
moderately sorted
Shale Grain Size: Clay particles Lakes/ deep sea
fine (cohesion) (low energy)
Shape: laminations
n/a
Sorting:
well sorted
Sandstone Grain size: Calcite, Iron oxide Deserts/ dune beds
(red or medium and silica (red sandstone)
cream) Shape:
well rounded Beaches, continental
Sorting: shelf, deltas /
well sorted bedding
(cream sandstone)
Bioclastic Grain size: Fossil fragments, Warm, shallow
limestone fine-coarse micrite, calcite seas
Shape: crystals often stricter-less in
angular (fossil (CaCO3 -…read more

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Oolitic Grain size: Ooliths- balls of Tropical beaches
limestone medium micrite cross bedding
Shape: (lime mud)
well rounded (CaCO3)
Sorting:
well sorted…read more

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