Exam2

What happens at divergent boundaries between tectonic plates?

Plates move apart.

What crust types are involved in oceanic/oceanic divergent boundaries?

Oceanic crust.

What process creates new sea floor at divergent boundaries?

Sea floor spreading.

What notable feature is formed at oceanic/oceanic divergent boundaries?

Mid-ocean ridge.

Which ridge is an example of an oceanic/oceanic divergent boundary?

Mid-Atlantic Ridge.

What is formed when continental/continental plates diverge?

Continental rifting.

What is the main process involved in convergent boundaries?

One plate sliding underneath the other, destroying sea floor

What destruction occurs at oceanic/continental convergent boundaries?

Old sea floor is destroyed.

What features are typically formed at oceanic/continental convergent boundaries?

Trench and volcanic arc

Example of a trench formed at oceanic/continental convergent boundaries?

Peru-Chile Trench.

What is formed at continental/continental convergent boundaries?

Tall mountains.

What is a well-known example of a mountain range formed at a continental/continental convergent boundary?

Himalaya Mountains.

What is the process called for transform boundaries?

Transform faulting.

What type of fault is associated with the Mendocino Fault?

Transform fault.

What is an example of an active continental margin?

West Coast of America.

What are abyssal plains?

Flat regions of the ocean floor.

What is a characteristic of turbidite deposits?

Creates deep sea fans.

What is graded bedding?

Sediment size decreases from coarser material at the base to finer material at the top.

What are seamounts?

Pointed submerged inactive volcanoes.

What is a tablemount?

Flat submerged inactive volcano.

What are hydrothermal vents?

Sea floor hot springs created when cold seawater seeps into cracks in ocean crust and is heated by magma, working back to surface and exiting through sea floor

What is lithogenous sediment?

Rock material from continents or volcanic eruptions.

What is biogenous sediment made of?

Calcium Carbonate (CaCO3) and siliceous (SiO2) from organisms.

What organisms produce siliceous sediment?

Diatoms and Radiolarians.

What is the primary habitat for calcareous ooze accumulation?

Shallower areas of ocean floor beneath warm surface water above CCD

What are manganese nodules?

Hydrogenous sediments formed from precipitation at hydrothermal vents.

Where do pelagic sediments accumulate?

Slowly on the ocean floor.

What is neritic sediment?

Rapidly accumulates on the continental shelf, slope and rise.