Card Set Information
Ocean Basins Munasinghe
About _____ % of the Earth surface is covered with water.
The three methods used to measure Ocean Depth are _____, _____, and _____.
Rope & Weight
If a sound pulse took 6 seconds to return from the seafloor, and if the speed of sound is 1500 m/sec, the depth is _____.
(1500 m/sec)(6 sec)
The 3 components of the Continental Margin are the _____, _____, and _____.
Shelf, Slope, Rise
The Continental _____ is the submerged part of the continent. Its width varies with changing _____.
Margin, Sea levels.
The true edge of the continent is marked by the continental _____.
Most beach sediments eventually end up depositing at the continental _____, at the foot of the _____.
_____ form by the covering of the rocky seafloor with mud falling from seawater.
_____ is the location where the seafloor forms and _____ are where they are destroyed.
MOR (Mid-Oceanic Ridge), Trench
The feature that clearly indicates that the seafloor spreads from the _____ is the _____ valley.
MOR (Mid-Oceanic Ridge), Rift
Fresh lava flows, and _____ along the _____ valleys indicates that the seafloor is spreading continuously.
As seafloor moves away from the MOR, it _____ taking any seamounts _____ with it.
Seamounts are submarine _____. They form over _____, or _____.
Volcanoes, Hotspots, Subduction Zones
List the evolution of seamounts.
Ocean basins are generally _____than continents.
Submarine canyons are deep _____ that cut acoss continental _____.
Submarine canyons transport coastal _____ to the continental _____.
The top of a guyot is _____ due to _____ by waves.
Turbidity currents are submarine _____of mud and sand, and they transport sediments very _____.
If the global sea level increased the area of the continental shelves will _____.
Submarine canyons form primarily due to mass movement along the continental _____.
_____ are submerged seamounts with coral reefs on them. They commonly enclose a _____.
The Continental _____ is the submerged extension of the continents.
Ocean = Seawater + _____
The shape and size of ocean basins constantly _____ over geologic time.
_____ are the deepest parts of oceans. They form due to _____ of the seafloor into the Mantle.
Trenches, Subduction (Sinking)
Ocean Basins _____ along Mid-Oceanic Ridges.
Submarine canyons are _____ trenches.
All trnches are actuall over 27,000 feet deep, but most of them are filled with _____ that come from nearby continents.
MORs can be identified by the presence of the _____ at the top.
During the Ice Ages when the sea level was low, the continental shelves we _____.
Most ocean trenches are found in the _____ Ocean.
Oceans form by _____ moving apart.
All oceans have a _____ in them.
MOR (Mid-Oceanic Ridge)
Due to Global Warming the width of the continental shelves is _____.