Group+2

Igneous Rocks

Rhyolite- fine grained, contains quartz, felsic, fast, extrusive, fine grained Scorria - mafic, fast, extrusive, fine grained, has bubbles Granite- coarse grained, contains quartz, felsic slow, intrusive, coarse grained Andesite- mafic, fast, extrusive, fine grained, sometimes contains quartz, mostly light material  Diorite - coarse grained, contains quartz sometimes, felsic, slow, intrusive, Basalt- mafic, fast, extrusive, fine, mostly dark material Pumice - fine grained, has bubbles, floats in water, felsic, extrusive, fast Gabbro- porphyritic, intrusive/extrusive, fast and slow, mafic, fine and coarse grained, mostly dark material,  Obsidian- glassy, mostly dark material, extrusive, fast cooling rate, felsic

Sedimentary Rocks

Conglomerate - clastic, contains fragments, round fragments, poorly sorted Coal- black color, contains plant material, organic <span style="color: rgb(0, 0, 102)">Limestone- chemical, reacts with acid, geode <span style="color: rgb(0, 0, 102)">Brecchia- clastic, poorly sorted, contains fragments, angular fragments <span style="color: rgb(0, 0, 102)">Shale- contains fragments, stratification, fossils, well sorted, clastic <span style="color: rgb(0, 0, 102)">Chert- clastic, well sorted, fossils, scratches limestone <span style="color: rgb(0, 0, 102)">Sandstone- clastic, well sorted, stratification, contains fragments <span style="color: rgb(0, 0, 102)"> <span style="color: rgb(0, 0, 102)">Coquina- organic, reacts with acid, contains fragments, angular fragments, bubbles when acid is applied <span style="color: rgb(0, 0, 102)"><span style="color: rgb(0, 0, 102)">Siltstone- clastic, well sorted, reacts with acid, stratification, contains fragments, bubbles with acid

Metamorphic Rocks

<span style="color: rgb(0, 51, 0)">Quartzite- nonfoliated, metamorphosed quartz, heat, scratches a knife blade <span style="color: rgb(0, 51, 0)">Marble- <span style="color: rgb(0, 51, 0)"> <span style="color: rgb(0, 51, 0)"> nonfoliated, metamorphic limestone/calcite, heat, sparkles, bubbles when acid is applied <span style="color: rgb(0, 51, 0)">Schist- foliated, metamorphosed chlorite, pressure, medium-sized grains, breaks into layers <span style="color: rgb(0, 51, 0)">Gneiss- foliated, metamorphosed muscovite, pressure and heat, large mineral grains, banded <span style="color: rgb(0, 51, 0)">Slate- foliated, metamorphosed shale, pressure, fine grains, breaks into layers, more dense than shale