ERS120H5 Lecture Notes - Lecture 3: Plate Tectonics, Continental Crust, Oceanic Crust

20 views2 pages
18 Feb 2014
School
Department
Course

Document Summary

Earth"s crust: continental crust (low density) 35 km thick 2. 6 grams more dense than water (1, oceanic crust (high density) 10 km thick 3. 2 grams more dense than water (1) Tectonic plate is not just the earth"s crust but also includes interior. Plate tectonic model: lithosephere = thin, cool, and hard, asthenosphere = weak and hot, lithosphere broken into large fragments called plates, plates float on asthenosphere, plates move around and interact w/ each other. Isostasy: plates float @ an elevation depending on thickness and density, required pressure to be equal, himalayas are high due to deep root. Plate boundaries can be: divergent : moving away from each other, convergent: moving towards each other, transform: moving past each other. Plate tectonics: on the move: pangea (greek : all lands, starting 200 million years ago, continents started to drift away from each other led to continental drift hypothesis wasn"t accepted.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents