Rock lab due date and Rock quiz next class

even Due 5/2 odd Due 5/3

Sedimentary & Metamorphic Rock Identification Lab KEY

	Color	Grain	Texture	Other Observations	Rock Name
I	Dark	Coarse	Weakly foliated	Cleavage shows parallel plate like mineral crystals	Amphibolite
Ii	Black	Super fine	Non-foliated	Shiny conchoidal fractures	Anthracitic coal
Iii	Varies	Coarse >2mm pebbles	Fragments in sandstone	Angular fragments	Breccia
Iv	Black-brown	Non porous	Sooty	Commonly spotted with yellow sulfur compounds	Bituminous coal
V	White-grey	Too small to be seen	Powdery	Shell fragments	Chalk
Vi	Varies	Too small to be seen	Glassy conchoidal cleavage	Quartz, SiO2 from the shells of marine single celled organisms	Chert
Vii	Varies	Coarse >2mm pebbles	Abraded-rounded pebbles in sandstone	Looks like broken concrete	Conglomerate
Viii	Varies	Very porous	Shell fragments	Slightly cemented in calcite	Coquina
Ix	Varies	Fine –very fine	Gritty-sandpapper	Sugary appearance	Dolostone
X	Varies	Fine	Rough with fossil fragments	Fossils cemented and appear floating n limestone	Fossiliferous limestone
Xi	Varies	Coarse	Foliated	Bands of feldspar, quartz and olivine	Gneiss
Xii	Varies	Too small to see	Glassy conchoidal cleavage	Transparent and slick	Gypsum
Xiii	Dark	Very fine	Non-foliated	Looks like basalt	Hornfels
Xiv	Varies	Fine to coarse	Non-foliated	Sugary sparkles	Marble
Xv	Brown	Very porous	Fibrous	Plant material	Peat
Xvi	Varies	Fine	Foliated	Layers with mica impart sheen/luster	Phyllite
Xvii	Varies	Medium to coarse	Rough like sandpaper	Quartz grains	Quartz Sandstone
Xviii	Varies	Coarse	Foliated	Poor cleavage leaves crinkly appearance	Schist
Xix	Varies	Very fine	Slightly gritty	Slick when wet, breaks into sheets	Shale
Xx	Varies	Very fine	Foliated	Common to have cleavage through  cross bedding, slight sheen; looks like mud	Slate