Types of Boundaries
oceanic and continental
True
What type of rock do we associate with fossils?
sedimentary
Scientists matched the fit of the continents and these things on Africa and S. America to show the plates were once connected
Fossils.
A lowland region that forms where Earth's tectonic plates move apart.
a rift valley
What is the term for where two plates meet?
boundary
What type of geological feature is formed when an oceanic plate is subducted beneath a continental plate?
Volcanic mountain range
What is the term for the movement of tectonic plates that causes the formation of new oceanic crust?
Divergence or divergent boundary
The man who proposed continental drift.
Alfred Wegener
What type of boundary does new crust generally form at? hint: plates moving apart
Divergent
What type of boundary occurs when two tectonic plates slide past each other horizontally?
Transform boundary
What geological feature is often associated with transform boundaries?
Earthquakes
What TWO phenomena most likely caused plates to drift?
seafloor spreading and convection currents in the mantle
Do the following features describe a deep ocean trench or mid-ocean ridge:
- crust is destroyed
- forms at convergent boundary
- older rock found here
Deep ocean trench
What tectonic event is responsible for the formation of the Mid-Atlantic Ridge?
Sea-floor spreading
What type of boundary occurs when two tectonic plates move away from each other?
<--- --->
Divergent boundary
What geological feature is commonly formed at a divergent boundary in the ocean?
Mid-ocean ridge
What is the process called when new oceanic crust is formed as tectonic plates move apart?
Sea-floor spreading
Do the following features describe a deep ocean trench or mid-ocean ridge:
- crust is created
- forms at divergent boundary
- younger rock found here
mid-ocean ridge
When one plate subducts beneath the other, it forms this long, narrow steep-sided depression in the bottom of the ocean.
what is a trench
What type of boundary occurs when two tectonic plates move towards each other?
---> <---
Convergent boundary
What geological feature is commonly formed at a convergent boundary between two continental plates?
Mountains
What is the process called when one tectonic plate moves under another and sinks into the mantle?
Subduction
Which tectonic plate is the largest and most active?
Pacific Plate
What famous fault line is an example of a transform boundary in the United States?
San Andreas Fault