ES Notes-Int. of Earth-Earthquakes & Volcanoes

ES Notes-Int. of Earth-Earthquakes & Volcanoes -...

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General Earth Science A. Interior of the Earth 1. How do we know about it a. Earthquake waves 1. P-waves and S-waves 2. 3. Study of meteorites a. Iron meteorites b. Stony iron c. Stony meteorites 2. Mechanical layers of the Earth - divisions based on changes in physical  properties a. Lithosphere      - rocky outer layer, deforms brittly for the most part 1. Makes up the plates in plate tectonics 2. Approximately 100 Km thick b. Asthenosphere      - "weak" layer that flows 1. Mechanism of movement in plate tectonics 2. Flows on longer time scales 3. 100-700 Km depth c. Mesosphere      - middle layer 1. Solid, rocky setting 2. Increase in density with depth 3. 700-2900 Km in depth d. Outer core     1. Only true liquid 2. Produces Earth's magnetic field 3. 2900-5300 Km in depth e. Inner core     1. Solid 2. To the center of earth - 6371 Km 3. Layers based on compositional changes a. Crust - Outermost layer 1. Oceanic a. 3.2 grams per cubic cm. b. Basalt 2. Continental a. 2.8 grams per cubic cm. b. Diorite comp on average b. Mantle - Middle layer 1. Largest volume of Earth 2. Contains part or all of these mechanical layers a. Lower lithosphere
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b. Asthenosphere c. Mesosphere 3. Rock - periditite (olivine rich) 3.5 -5 grams per kg 4. 40-2900 Km c. Core - at the center 1. Composition is predominantly metallic iron 2. B. Earthquakes
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This note was uploaded on 04/18/2008 for the course GEO 27114 taught by Professor Rohs during the Spring '08 term at Northwest Missouri State University.

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ES Notes-Int. of Earth-Earthquakes & Volcanoes -...

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