Earth Science 14-2 Ocean Floor Features

18 terms by Turpin

Create a new folder

Advertisement Upgrade to remove ads

continental margins

shallow portions of the ocean floor that are made of continental crust

ocean basin floor

area of deep-ocean floor between the continental margin and the oceanic ridge

mid-ocean ridge

An underwater moutain chain where new ocean floor is formed

Atlantic Ocean

thick layers of undisturbed sediment cover continental margins
very litle volcanic or earthquake activity

Pacific Ocean

crust plunging beneath continental crust- narrow continental margin - results in volcanoes and earthquakes

continental shelf

gently sloping submerged surface extending from shore line contains oil, natural gas, sand, gravel

continental slope

a steep incline leading down from the edge of the continental shelf

submarine canyons

deep, steep-sided valleys cut into the continental slope

turbidity canyons

down slope movements of dense, sediment-laden water
-sand and mud on the continental shelf

continental rise

the gently sloping surface at the base of the continental slope

deep ocean trenches

a deep valley along the ocean floor through which oceanic crust slowly sinks towards the mantle

Mariana Trench

deepest known place on Earth

Ring of Fire

major belt of volcanoes that rims the Pacific Ocean

Abyssal Plains

flat, sediment covered areas in the ocean basin

seamounts

volcanic peaks that have not reached the ocean surface

guyots

flattened seamounts caused by erosion from waves and currents

sea floor spreading

occurs where two lithospheric plates are moving apart

hypothermal vents

zones where heated, mineral-rich water ecapes through cracks in ocean crust

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set