Boundary types Flashcards
Andesitic Lava
Lava comprised dominantly from Andesite rock. It is cooler than Basaltic lava at around 900-1000 C as well as more viscous and a higher gas content.
Basaltic Lava
Lava comprised of molten Basalt and traces of other rock. It has the highest temperature at around 1100-1200 C and possesses the lowest viscosity and gas content.
Collision Plate Boundary
A convergent plate boundary where two plates of relatively the same density/type move into each other.
Conservative Plate Boundary
A plate boundary where two plates move parallel to one another.
Constructive Plate Boundary
A plate boundary where two or more plates move away from one another.
Convergent Plate Boundary
A plate boundary where two or more plates move into each other.
Destructive Plate Boundary
A convergent plate boundary where a denser oceanic plate is sub ducted under the older continental plate.
Divergent Plate Boundary
A plate boundary where plates move apart from one another, resulting in magma being pushed up the gap via convection.
Main Large Plates
- Antartic
- Pacific
- North American
- South American
- African
- Eurasian
- Australian
- Nazca
Oceanic Trench
Long, narrow depressions in the sea floor formed at the boundaries of submerged plates.
Plate margin
boundary area where two or more tectonic plates meet.
Rhyolitic Lava
Lava mostly comprised of rhyolite. Is the coolest Lava type sitting around 700 C with the highest viscosity and gas content.
Rift Valley (formation)
downwards displacement of material between two nearly parallel faults at a plate margin.
Subduction Zone
Area of destructive plate boundary where the oceanic plate is sub ducted under the continental plate.
Transform Plate boundary
A plate boundary where two or more plates move against each other.
