MINERALS. Chemical composition of the Crust n Oxygen most abundant- 46.6% n Followed by silicon and aluminum n Iron, Calcium, Sodium, Potassium, Magnesium.
Igneous Rocks. Geo Facts Started in 1948 and located in SD The head is 26 m tall, his arm more than 70 m long Made of feldspar, diorite, and quartz Crazy.
Sedimentary Rocks John Day Fossil Beds Natl. Mon.,Oregon.
Mineral Identification Mr. Jensen Ref: McGuire – ES/PS.