SEDIMENTARY ROCK SPECIMEN

Rocks are simply defined as an aggregate of minerals. There three classifications Igneous Rocks formed  from cooled lava and magma associated with volcanic activity. Sedimentary Rocks formed from compacting sediments (pebbles, sand and clay) often below sea level. Metamorphic Rocks forms from preexisting rocks that get buried and remain in a solid state while immersed at various levels of heat and pressure.   

Sedimentary Rocks

Detrital sediments result from the erosion and subsequent transportation of a pre-existing rock; chemiscal sediments form by primary precipitation in shallow marine environments; organic sediments form from biological activity.

Sedimentary Rocks: Clastic from detrital inorganic matteral

Breccia

Breccia

Conglomerate

Conglomerate

Conglomerate

Sandstone

Sandstone

Varves (Sandstone and Shale)

Shale

Fossiliferous Shale

Fossiliferous Shale

Fossiliferous Shale

Sedimentary Rocks: Chemical and Bio-Chemical from percipitation

Fossiliferous Limestone

(Gastropods)

Fossiliferous Limestone

(Brachiopods)

Fossiliferous Limestone

(Crinoids)

Travertine Limestone

Travertine (cut and polished)

Travertine Limestone

Limestone (Calcite vein)

Limestone (with layers)

Dolostone

Bauxite

Oolitic Limestone

Pisolitic Limestone

Rock Salt

Rock Gypsum

Gypsum and Limestone

Sedimentary Rocks: Organic from the remains of living things

Coquina

Chalk

Diatomite

Bituminous Coal

Cannel Coal

Coal

Flint

Novaculite

Chert

Data: Pellant, Chris. Smithsonian Handbooks. Rocks and Minerals: The clearest recognition guide available. A Dorling Kindersley Book.

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