Geomorphology Flashcards
Active volcanoes
Volcanoes which erupt regularly
Anticline
The upward/ topmost bend of a fold.
Basin
A depression, or dip, in the Earth’s surface
Batholith
Large intrusion, often granite, which forms in the Earth’s crust
Bedding plane
the line separating layers of rock.
Butte
An isolated hill with steep sides and a flat top, formed when a mesa erodes, higher than it is wide
Continental drift
The theory that the continents were once one landmass called Pangea and that they drifted apart over time
Conservative/passive/transform margin/plate boundary
area/zone where two plates are moving sideways past one another (transverse).
Convergent/destructive margin/plate boundary
Area/zone where two or more plates are moving towards one another.
Core
The innermost layer of the earth
Crater
Depression around the vent of a volcano
Crust
Solid outermost layer of the earth
Crystalline structure
A rock that has mineral crystals in it
Divergent / Constructive margin / plate boundary
area/zone where two plates are moving away from one another.
Dormant volcanoes
Volcanoes that show no sign of activity, but have a history of erupting
Dyke
Wall-like igneous intrusion into sedimentary rock.
Earthquake
The sudden movement of the crust along a fault
Epicentre
Area on the Earth’s surface immediately above the focus of an earthquake
Erosion
The process whereby rock is broken down and transported
Escarpment
A steep slope along the edge of a plateau
Extinct volcanoes
Volcanoes that are not expected to erupt ever again
Extrusive igneous rock
Igneous rocks that form on the Earth’s surface
Fault
A crack in the Earth’s crust caused by stress or tension
Fault scarp
The steep slope of exposed rock above a fault
Fissure
A crack in the ground
Fold
Rock layers in the Earth’s crust that have been bent by forces of compression