Chapter 3 Rock Forming Minerals - Rock Forming Minerals...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Rock Forming Minerals
Background image of page 1

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

View Full DocumentRight Arrow Icon
What is a Rock? • A substance that is an aggregate of one or more minerals that is naturally formed and is consolidated or cohesive . • Example: The rock named granite is composed of the minerals quarts, mica, and feldspar.
Background image of page 2
Granite
Background image of page 3

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

View Full DocumentRight Arrow Icon
What is a Mineral? A substance that is a naturally occurring inorganic element or compound that has an a characteristics chemical composition, and has distinctive crystal form and physical properties. A mineral may be a single element such as copper (Cu) or gold (Au) or a combination of elements such as quarts (SiO 2 ). Approximately 3000 minerals have been identified and described. Many more likely exist. Minerals are usually formed by inorganic processes such as the solidification of magma or lava.
Background image of page 4
Elements All minerals are made up of elements. There are 92 chemical elements known to man. Eight (8) account for 99% by weight of the earth’s crust. –0 2 46.4% (of the earths crust) – Si 28.2% –A l 8 . 3% –F e 5 . 6% –C a
Background image of page 5

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

View Full DocumentRight Arrow Icon
Native Elements • Mineral consisting of a single chemical element – Gold (Au) – Silver (Ag) – Copper (Cu) – Lead (Pb)
Background image of page 6
Mineraloid • A mineral-like substance that does not demonstrate crystallinity (it is amorphous) but may meet other criteria of a mineral. – Obsidian (glass and not crystal) – Opal –A
Background image of page 7

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

View Full DocumentRight Arrow Icon
Mineral Identification Features • Color •S t r e a k •L u s t e r • Cleavage/Fracture • Hardness • Crystal Shape • Specific Gravity • Other Unique Properties
Background image of page 8
Identification by Color • The color of a mineral can be one of its most obvious attributes and results from chemical composition and
Background image of page 9

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

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/28/2008 for the course CIVIL CE 200 taught by Professor Unknown during the Fall '07 term at University of Alabama at Birmingham.

Page1 / 28

Chapter 3 Rock Forming Minerals - Rock Forming Minerals...

This preview shows document pages 1 - 10. Sign up to view the full document.

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