GEOL-LAB chapter 4 outline

GEOL-LAB chapter 4 outline - February 5 2012 Lab#4 Chapter...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
February 5, 2012: Lab #4 Chapter 4 – Minerals, Rocks, and the Rock Cycle A rock is an aggregate of mineral grains, fragments of previously existing rock, or a mass of natural glass. Formed through freezing of a melt, by cementation of loose grains, by precipitation from water solutions, from changes that happen in response to temperature and pressure underground. Rock composition: the identity of minerals or glass that make up a rock Rock texture: dimensions and shape of grains, the way in which grains are arranged, oriented, and held together. Three Classes of Rock Igneous rock form through the cooling and solidification of molten rock, which is created by the melting of preexisting rock in the mantel or lower crust. Molten rock below Earth’s surface is magma. Molten rock above Earth’s surface is lava. Sedimentary rocks form at or near the surface or the Earth in two ways 1) when grains of preexisting rocks accumulate, are buried, and then are cemented together by minerals precipitating out of ground water
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 3

GEOL-LAB chapter 4 outline - February 5 2012 Lab#4 Chapter...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online