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Penn State - GEOSC 40 - Spring 2018 - geosc 40 - Study Guide

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Penn State - GEOSC 40 - Spring 2018 - geosc 40 - Study Guide

School: Pennsylvania State University
Department: Geoscience
Course: The Sea Around Us
Professor: Chris Marone
Term: Spring 2018
Tags:
Name: geosc 40
Description: The sea around us Exam Study guide
Uploaded: 04/28/2018
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background image Geoscience 40: The sea around us  exam study guide Equilibrium theory of tides - deals with the position and the  attraction of the earth, moon, and sun to explain why tides  occur, best describes tides on a completely water covered  earth (tide formation) Dynamic theory of tides - effects of continents, shallow  water, and partially enclosed ocean basins on tide formation, more realistic model of tides Why does the moon have a bigger affect on tides than the  sun? 
-  the fractional difference in its force across the earth is 
greater than the fractional difference seen from the sun Sand budget on beach in terms of input and output: - Sand budget on a beach (input) - longshore transport, river  supply, cliff erosion, onshore transport - Sand budget on a beach (output) - longshore transport,  offshore transport, wind transport to dunes - Summer(fair weather beach) - steep, reflective, berm  developed
background image Longshore drift (cause and consequence): -  caused by oblique angle of wave approach and waves  refract and change angle of approach, can supply and  remove sediment from the nearshore region The 3 basic forces that move plates: 1) ridge push  2) slab pull 3) basal drag Divergent - spreading center, plate material created Transform - plates slide past, plate material conserved Convergent - subduction zone, plate material destroyed Wilson cycle 1. spreading(divergence) - mature, Atlantic and arctic ocean 2. subduction (convergence) - declining, pacific ocean 3. collision (convergence) - terminal, mediterranean sea 4. suturing (convergence) -  suturing, himalayas
background image When changes with age and distance from the spreading  center occurs (with increasing distance from the ridge crest)  - heat flow decreases, hydrothermal activity decreases,  oceanic plate thickens and subsides, seafloor depth  increases, sediment thickness increases Active continental margin: Found on the leading edge of the continent where it is crashing  into an oceanic plate, sites of tectonic activity: earthquakes,  volcanoes, mountain building, and the formation of new igneous  rock Passive continental margin found along remaining coastlines, there is no collision or  subduction, so tectonic activity is minimal In order to explain why is the oldest oceanic crust only about 200 million years old, it is crucial to know that oceanic crust  is formed when hot magma wells up at mid ocean ridges,  then slowly spreads out towards the edges of the ocean,  when it collides with continents, it slides under the land, and 

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School: Pennsylvania State University
Department: Geoscience
Course: The Sea Around Us
Professor: Chris Marone
Term: Spring 2018
Tags:
Name: geosc 40
Description: The sea around us Exam Study guide
Uploaded: 04/28/2018
10 Pages 18 Views 14 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
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