ERS120H5 Lecture Notes - Lecture 7: Great Salt Lake, Migmatite, Extrusive Rock
Document Summary
Cement is not a rock because its man-made) Composed of multiple minerals: all the same mineral or many different types. Formed from the cooling of molten (melted) rock. Formed at the surface of the earth by deposition and cementation of particles of rock transported by wind, water or ice or biochemically produces debris. Made up of other rocks and minerals. Formed when sedimentary, igneous or metamorphic rocks are heated and/or squeezed (the rock has been changed) *know the rock cycle diagram and how to draw it. Theres different places for magma to cool down. If it cools underground, it cools very slowly (intrusive: if it cools slowly, we get many mineral crystals. If it cools above ground, it cools very quickly (extrusive: if it cools fast, we get very little mineral grains to none. Ripples on a hard rock and on a beach. We can get lots of information from the rocks.
