Group+4

Igneous Rocks - made from molten rock that cools and hardens

Rhyolite - fine grained, extrusive, fast cooling rate, felsic Scorria - fine grained, extrusive, fast cooling rate, mafic, bubbles when acid is applied Granite - (bathroom pass) coarse, intrusive, slow cooling rate, felsic Andesite  - fine grained, extrusive, fast cooling rate, mafic Diorite - coarse, intrusive, slow cooling rate, felsic Basalt - fine grained, extrusive, fast cooling rate, mafic Pumice - fine grained, extrusive, fast cooling rate, felsic, bubbles when acid is applied Gabbro - porphyritic, intrusive & extrusive, fast & slow cooling rate, mafic  Obsidian - glassy black, extrusive, fast cooling rate, felsic

Sedimentary Rocks - made of pieces of other rocks cemented together

Conglomerate - clastic, pooe Coal-<span style="color: rgb(0, 0, 0)"> <span style="color: rgb(0, 0, 0); background-color: rgb(255, 245, 245)"><span style="color: rgb(0, 0, 0); background-color: rgb(239, 237, 230)"><span style="color: rgb(0, 0, 0); background-color: rgb(251, 239, 239)"><span style="background-color: rgb(255, 245, 245); color: rgb(8, 7, 7)">      pure black,organic <span style="color: rgb(0, 0, 102)">Limestone - geode, and chemical, bubbles when acid is applied <span style="color: rgb(0, 0, 102)">Brecchia- Clastic, poorly sorted <span style="color: rgb(0, 0, 102)">Shale - Fossils/strat, well sorted, clastic <span style="color: rgb(0, 0, 102)">Chert -clastic, well sorted, stratification <span style="color: rgb(0, 0, 102)">Sandstone <span style="color: rgb(0, 0, 102)">- clastic, well sorted, stratification <span style="color: rgb(0, 0, 102)">Coquina <span style="color: rgb(0, 0, 102)">- organic bubbles when acid is applied Siltstone- clastic, well sorted, strat

Metamorphic Rocks - created by changes brought about by heat, pressure, chemical reactions

<span style="color: rgb(0, 51, 0)">Quartzite - non-foliated, formed by heat, previously quartz <span style="color: rgb(0, 51, 0)">Marble <span style="color: rgb(0, 51, 0)"> <span style="color: rgb(0, 51, 0)"> - non-foliated, formed by heat, previously limestone <span style="color: rgb(0, 51, 0)">Schist - foliated, formed by pressure, previously chlorite <span style="color: rgb(0, 51, 0)">Gneiss - foliated, formed by heat & pressure, previously muscovite <span style="color: rgb(0, 51, 0)">Slate - foliated, formed by pressure, previously shale