EAPS 10200 Lecture Notes - Lecture 2: Schist, Layer Cake, Gneiss

• School: Purdue University
• Department: Earth Atmos Planetary Sci
• Course: EAPS 10200
• Professor: Professor Balloti

Document Summary

Minerals: minerals are naturally occurring, inorganic solids with a definite chemical composition and crystalline structure. Rocks: rocks are aggregates of one or more minerals. Crystal habit: the characteristic shape of individual crystals based on how the atoms of the mineral are arranged. Cleavage: the tendency of minerals to break along planes of weaknesses in the crystal structure. Fracture: the way minerals break apart other than along lines of cleavage. The mohs hardness scale goes from 1 (softest) to. Specific gravity: the weight of a mineral compared to the weight of water. Color: an obvious property but usually not very useful for identifying the type of mineral. Streak: the color of the mark left by a mineral after scratching it on a ceramic surface. Glassy, pearly, earthy, resinous, metallic are a few qualifiers: minerals are solid materials naturally formed in the earth that have never been part of a living thing. Minerals either solidify from magma or deposited from water solutions.