Sedimentary Rocks
SEDIMENTARY ROCKS LITHIFICATION Layered Sedimentary Rocks: Grand Canyon Grand Canyon Types of Sedimentary Rocks 1. Clastic (broken)/Fragmental Form from the compaction and cementation of broken sediments Which one is a conglomerate? Rounded fragments Angular fragments Conglomerate Breccia Sandstone Formed from the compaction and cementation of Sand grains Rocky Beach Sandy Beach Siltstone Compaction of: Silt! Shale ? compaction of: clay Layers of shale 2. Chemical/Crystalline Formed from materials once dissolved in water Evaporates/Precipitates (ex: Rock salt ? salt dissolves in water, water evaporates, salt hardens) Rock Salt ? forms from the mineral: Halite Salt Fields Rock Gypsum ? forms from the mineral: Gypsum Dolostone