Chapter 4 Part II OCEAN.docx

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Department
Natural Resources
Course
NR 150
Professor
Ursula
Semester
Spring

Description
Chapter 4 Part II Continental margins Passive and active 1. Passive continental margin not much geologic activity continent is just being pushed, diverging plates 2. Active margin you would see a trench and subduction zones and have earthquakes, converging plates High EQ or volcanic activity, pacific type margins Continental shelf is the submerged extension of continents Underlain by granitic continental crust Sediments from erosion from land Gently sloping seaward Oil and minerals Water depth: average 75 something • Continental shelf shaped by • Tectonics passive or active • Ocean currents fast vs slow • Sea level high or low • Narro
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