glaciers Flashcards
(24 cards)
What is a corrie?
A bowl-shaped depression formed by the headward erosion of a glacier.
What is a pyramidal peak?
A pointed mountain peak with at least three sides, formed by the erosion of cirques on three or more sides.
What is a ribbon lake?
A long, narrow lake found in a glacial trough, often with steep sides and a flat bottom.
What is an arete?
A narrow, sharp ridge formed by the erosion of glaciers on either side of the ridge.
What is a hanging valley?
A smaller glacial valley that joins a larger, deeper valley, often with a waterfall.
What is a tarn?
A small mountain lake formed in a cirque or glacial trough.
True or False: A fjord is a type of glacial landform.
True
What is a drumlin?
An elongated hill formed by glacial deposition of till.
What is a kettle hole?
A depression formed by the melting of a block of ice left behind by a retreating glacier.
What is a moraine?
A ridge or layer of glacial till deposited by a glacier.
What is an erratic?
A large boulder that has been transported and deposited by a glacier.
What is a roche moutonnée?
A type of bedrock hill that has been shaped and smoothed by glacial erosion on the stoss side and plucking on the lee side.
What is a periglacial environment?
An environment near the margins of ice sheets or glaciers where freezing and thawing of the ground occur.
What is a nivation hollow?
A small depression formed by the melting of snow in a corrie or other high-altitude area.
What is a pingo?
A dome-shaped hill formed by the freezing of groundwater in permafrost.
What is a solifluction lobe?
A mass of saturated soil moving downhill over frozen ground in a periglacial environment.
What is a patterned ground?
A surface covered with polygonal or reticulate patterns caused by the freezing and thawing of the ground in a periglacial environment.
What is a frost heave?
The lifting of the ground surface caused by the expansion of freezing water in the soil.
What is a pingosat?
A depression formed by the collapse of a pingo.
True or False: Glacial landforms are only found in regions with current glaciers.
False
What is a proglacial lake?
A lake formed in front of a glacier as it retreats and leaves a depression in the terrain.
What is a striation?
Grooves or scratches on bedrock caused by the movement of a glacier.
What is a cirque stairway?
A series of step-like depressions formed by the erosion of a glacier in a cirque.
What is a rock basin?
A bowl-shaped depression formed by the plucking of bedrock by a glacier.
