Mica is a sheet silicate (phyllosilicate).
Intrusive igneous rocks: diorite, gabbro, granite, pegmatite, and peridotite
Extrusive igneous rocks: andesite, basalt, obsidian, pumice, rhyolite, scoria, and tuff
San Andreas Fault: It occur in between Pacific Plate and the North American Plate. Areas around it are earthquake-prone. Pacific Plate has San Diego, Los Angeles and Big Sur. North American Plate has San Francisco, Sacramento and the Sierra Nevada.
Scree: A collection of broken rock fragments at the foot of mountain cliffs or volcanoes. Landforms associated with these materials are often called talus deposits. Animals like marmot and pika live in these habitat.