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Geological Events Vocabulary

Across
The cool, rigid, outermost layer of Earth consisting of the crust and the uppermost part of the mantle; broken into pieces or segments called plates
Any process that happens on Earth, such as weathering, erosion, or plate tectonics
A description of land surface area with reference to elevation variations
The boundary between two tectonic plates moving towards each other, resulting in volcanic activity when a denser oceanic plate subducts, or moves below, a continental plate or another oceanic plate
An underwater mountain system formed by plate tectonics; the largest single volcanic feature on Earth
The boundary between the two tectonic plates moving away from each other ( on land it creates a rift valleys; on the sea floor it creates new oceans crust and mountainous ridges)
Down
The solid layer with plasticity in the upper mantle that is located just below the lithosphere (Lithospheric plates "float" and move on this layer.)
Occurs when two tectonics plates move toward each other and collide
Theory that the lithosphere is divided into tectonic plates that slowly move on top of the asthenosphere
The place where two different plates have contact
A major geological event; occurs when continental plates of equal density converge
Occurs when two tectonic plates slide past each other