Rock Guide

Igneous

	felsic	intermediate	mafic
intrusive	granite	diorite	gabbro
extrusive	rhyolite	andesite	basalt

plus 

glassy ---> obsidian

foamy ---> pumice

Sedimentary

Water speed	Source sediment	--->	Sedimentary rock
slow	mud	--->	shale
medium	sand	--->	sandstone
fast	angular gravel	--->	breccia
fast	rounded gravel	--->	conglomerate
varies	calcite body parts		limestone

Metamorphic

sediment	--->	Sed Rock	--->	Met rock	--->	Met Rock	--->	Met Rock
mud	--->	shale	--->	slate
				slate	--->	schist
						schist	--->	gneiss
sand	--->	sandstone	--->	quartzite
		limestone	--->	marble