Nats 101 study guide 2 - CHAPTER 13: Oceans and Coastlines...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CHAPTER 13: Oceans and Coastlines Oceans/ Coastlines/ Ocean Floor - Oceans formed early in earth’s geological history - Oceans and coastlines are constantly changing due to plate tectonics, wave action, sedimentation and   human  activity - Over 2/3 of earth is covered in salt water - Oceanic and atmospheric circulation patterns redistribute earth’s heat and play a crucial role in  controlling our  planets climate The avg. depth of the ocean floor is 4 km and the max. depth is over 11 km along the Marana trench - Ocean basins include continental shelves, abyssal plains, oceanic ridges and oceanic trenches - Sea level    elevation at the surface of the ocean - Termed Bathymetry    measurement of the depth to the ocean floor and the mapping of its features  Four major Depth Zones in the Ocean Floor 1. Continental Shelf: submerged continental crust that slopes away from the coast with maximum water depths of a  few hundred meters. Immediately adjacent to continental land-masses  2. Abyssal Plain: continental slope is marked by a rapid deepening of the ocean. Generally over 4 km below the ocean  surface and are some of the flattest portions of earth’s surface. 3. Oceanic Ridge: submarine mountain chain that can be traced around the world. The ocean depth is relatively  shallow along the crest of the ridge system 4. Oceanic Trenches: narrow, deep oceanic trenches lying along active margins marked by the convergent boundary 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/02/2008 for the course NATS 101 taught by Professor Allister during the Fall '08 term at University of Arizona- Tucson.

Page1 / 2

Nats 101 study guide 2 - CHAPTER 13: Oceans and Coastlines...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online