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ESCI - 1210 Earth Science Week 3 Notes

by: Ryan Linska

ESCI - 1210 Earth Science Week 3 Notes ESCI 1210

Marketplace > Macomb Community College > Science > ESCI 1210 > ESCI 1210 Earth Science Week 3 Notes
Ryan Linska
Macomb Community College

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About this Document

These notes cover Week 3 of ESCI - 1210
Earth Science
Gregory D. Barrows
Class Notes
Science, EARTH, natural
25 ?




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This 4 page Class Notes was uploaded by Ryan Linska on Thursday September 8, 2016. The Class Notes belongs to ESCI 1210 at Macomb Community College taught by Gregory D. Barrows in Fall 2016. Since its upload, it has received 8 views. For similar materials see Earth Science in Science at Macomb Community College.

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Date Created: 09/08/16
ESCI – 1210 – Natural Science 1210 Fall 2016 George Barrows Week 3 – 09/07/2016 Rock Forming Silicates ­ Most common mineral group ­ Contains a silicon/oxygen tetrahedron atomic structure o Four oxygen atoms surrounding a smaller silicon atom o Combines easily with several other atoms to form various  silicate structures Non­Silicates ­ Major groups of non­silicates o Oxides o Sulfides o Carbonates o Halides o Native Elements  Gold, Copper, Silver, etc. Mineral Groups ­ Non­silicate minerals o Carbonates  Major rock forming group  Found commonly in limestone and marble  May have economic value Natural Resources ­ Renewable o Able to be replenished in a short amount of time ­ Non­renewable o Fixed quantities Rock Cycle ­ Shows interrelationship between among three rock types ­ Earth as a system: The Rock Cycle o Magma  Crystallization o Igneous Rock  Weathering, transportation, and deposition o Sediment  Lithification o Sedimentary Rock  Metamorphism (change form) o Metamorphic Rock  Melting (becomes liquid) o Magma ­ The full cycle doesn’t always occur due to shortcuts or  interruptions o For example, sedimentary rock melting Igneous Rocks ­ Form as magma cools and crystallizes o Rocks that form inside the Earth are called plutonic or  intrusive rocks o Rocks that form on the surface:  Formed from lava (similar to magma, but does not  contain gas)  These care called volcanic or intrusive rocks Crystallization of Magma ­ Ions are carried into orderly patterns ­ The size of the crystals are determined by the rate at which they  cool o Slow cooling = large crystals o Fast cooling = small crystals o Very fast cooling = glass Classification ­ Based on the rocks texture and mineral constituents o Texture refers to the size and arrangement of crystals Types of Texture ­ Fine grained = fast cooling ­ Coarse grained = slow cooling ­ Porphyritic (two crystal sizes) = two different rates of cooling ­ Glassy = very fast ­ Vesicular = contain holes left by gas bubbles that exploded during  a fast rate of cooling ­ Pyroclastic = fragmented, caused by consolidation of volcanic  fragments Mineral Composition ­ Explained by Bowens Reaction Series which shows the order of  crystallization ­ Influenced by crystal settling in the magma Naming Igneous Rocks ­ Granitic rocks (Felsic) o Composed of light colored silicates ­ Basaltic or Mafic o Composed of dark colored silicates ­ Other composition groups o Andesitic o Ultramafic (Super Dark)


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