Tectonic Plate History
Harry Hess discovered this formation of new areas of oceanic crust which occurs when magma rises.
What is seafloor spreading?
A lowland region that forms where Earth's tectonic plates move apart.
What is a rift valley?
Large slabs of rock that divide Earth’s crust and move constantly to reshape the Earth’s landscape.
What are tectonic plates?
The name of the smallest tectonic plate on Earth.
What is the Juan de Fuca Plate?
The type of convergent boundary that has two land plates coming together.
What is Continental-Continental?
According to Alfred Wegener, this happened about 225 million years ago.
What is Pangaea started to split up?
A long, narrow steep-sided depression in the bottom of the ocean.
What is a deep ocean trench?
The place where two tectonic plates move towards each other.
What is a convergent boundary?
The name of the biggest tectonic plate on Earth.
What is the Pacific Plate?
The type of convergent boundary that has one land plate and one denser ocean plate coming together.
What is Continental-Oceanic?
The man who proposed continental drift.
Who is Alfred Wegener?
A curving chain of volcanic islands occurring around the margin of ocean basins.
What is an island arc?
The place where two tectonic plates slide past each other.
What is a transform fault boundary?
The tectonic plate we are currently on.
What is the North American Plate?
The type of convergent boundary that has two ocean plates coming together.
What is Oceanic-Oceanic?
The man who discovered seafloor spreading.
Who is Harry Hess?
An area in the asthenosphere where magma is hotter than surrounding magma, producing super hot magma that punches a hole in the lithosphere to produce volcanoes that are NOT near a plate boundary.
What is a plume or hot spot?
The place where two lithospheric plates come together, the denser plate subducting under the less dense plate.
What is a subduction zone?
The number of tectonic plates on Earth.
What is 15-20?
The landform that divergent boundaries on land create.
What are rift valleys?
The man who first proposed that the Earth’s crust is divided into huge slabs of rock that move slowly across the globe.
Who is J. Tuzo Wilson?
The region around much of the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur.
What is the Ring of Fire?
The boundary where two tectonic plates move away from each other.
What is a divergent boundary?
The two tectonic plates that are creating the Himalaya Mountains and Mount Everest.
What are the Eurasian and Indo-Australian Plates?
The landform that divergent boundaries in the ocean create.
What are mid-ocean ridges?