Boundaries
This boundary is the result of 2 plates moving together.
Wegner
This layer is the outer most layer of the earth
Crust
This is the result of 2 continental plates colliding.
Mountains
The youngest crust on is found in what Formation
Close to Mid-Ocean ridges
This boundary is the result of 2 plates moving apart.
Divergent Boundary
Where did the continents 'drift' from?
Pangaea
The lithosphere composes the these two areas of the Earth's layers. Also is the part of plate tectonics.
Upper mantle and crust
Why don't volcanoes form near mountain ranges.
There is no subduction zones allowing magma to reach the surface.
Subduction zones are responsible for what formation other than trenches and underwater mountains
Volcanoes or Island arcs
This boundary is the result of 2 plates sliding past one another in opposite directions or the same directions just a different rates.
Transform boundary
Harry Hess came up with the idea of this formation causing plates to move.
Seafloor spreading
This type of crust is mainly composed of basalt is is very dense.
Oceanic crust
The Gomar Challenger discovered this formation in the middle of the pacific ocean
Mariana Trench (mid pacific ridge)
The San Andres Fault is a boundary of what 2 plates
Pacific and North American
If new crust is being made at mid-ocean ridges, how does the surface of the earth not expand.
Subduction zones melt existing plates to make room
Seafloor spreading is the result of what process?
Convection currents
This layer is composed of the lower mantle.
Asthenosphere
At mid ocean ridges, we have evidence for what switching many times over Earth's life time
This feature in Africa is evidence that it was once present in the far north latitudes.
Glacial deposits
Earth quakes only occur at transform boundaries. What is an area called when it had frequent breaking along the transform boundary
Strike-slip fault
These areas are a result of new crust being formed creating underwater valleys and mountains
Mid-Ocean Ridges
When the Asthenosphere reaches close to the crust (being pushed by convections currents near subduction zones) these formations form on the surface.
Volcanoes
What have we found in areas on both the East coast of South America and on the West Coast of Africa
Fossils of the same species
The idea that plates were all together at one point was who's idea
Wegner