Glaciers I Crossword Puzzle

QUESTIONS LIST:

• abrasion : as a glacier moves, it picks up debris, which gouges, scrapes and polishes the rock surface that it contacts in a process called this.
• lateral : this type of moraine forms when rocks & debris are ripped from the valley walls and embed in the glacier sides as it moves.
• plucking : this is an erosional action of a glacier, when, as it moves, attached rocks are ripped away and carried off.
• medial moraine : the lateral moraines of tributary glaciers join to form a strand of debris called this because it is carried down the glacier’s center.
• drift : this is any material that has been deposited by a glacier.
• horn : erosion by three or more glaciers will frequently create this which is a sharp mountain peak.
• outwash : this is a type of glacial drift that is left behind by running glacial meltwater & is well sorted and stratified, with the heaviest materials deposited first.
• rock flour : when abrasion is continuous & strong this is formed.
• col : if valley side erosion continues excessively, an arête may be completely worn down to form a mountain pass called this.
• arÊte : this is a sharp ridge that is created due to the creation of two cirques, which greatly erodes the valley walls between them.
• cirque : this is a hillside hollow that is created by glacial plucking & abrasion.
• alpine : this type of glacier follow river valleys from the mountains to low-lying areas.
• striations : these are deep, long scratches or grooves that form in bedrock surfaces by debris frozen in moving glacial ice.
• till : this type of unsorted & unstratified glacial drift is left behind when glacial ice melts.
• gravity : this is responsible for moving glacial ice downhill.
• ground : this type of moraine forms from the debris load of a glacier in its lower ice layers & is deposited when the ice melts.
• tarn : when a cirque fills with glacial meltwater, it forms this small lake that the glacier leaves behind.
• continental : this type of glacier are huge ice sheets that spread out from valley glaciers to cover relatively flat, lowland regions.