Earth Science Daily Challenge, 12/11 What are the rocks around here like? Describe some of their characteristics.

SEDIMENTARY ROCKS made from small pieces of other rocks sediments or dissolved solids processes that make sedimentary rock 1)weathering – breaking up of materials into sediments and dissolved solids 2)erosion – transportation of materials by wind, water, ice, and/or gravity 3)deposition – laying down/settling of materials 4)lithification compaction – squeezing together of materials cementation – natural gluing of materials

SEDIMENTARY ROCKS classified by type & size of grains Clastic – from mineral sediments –SHALE made of clay size particles –SANDSTONE made of sand sized particles –CONGLOMERATE a mix of larger particles (BRECCIA) Organic – from once-living things –COAL made of dead trees & swamp plant –LIMESTONE made of shells of sea creatures (reefs) Chemical – from crystallization of dissolved solids –ROCK SALT halite crystallized via evaporation –ROCK GYPSUM gypsum crystallized via evaporation –LIMESTONE calcite crystallized via evaporation

Mudcracks Ripple Marks