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Security Briefing and Background Check
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Investigative Terms to Know
the process that BREAKS down rock WEATHERING
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the process by which natural forces move or CARRY sediment from one place to another
GROUND EROSION
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the process by which agents of erosion deposit, or DROP sediment
DEPOSITION
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Agent Gravity $ 1 million Mass Movement- any one of several processes where gravity moves sediment downhill
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Crime: Landslide Landslide- the most destructive form of mass movement EROSION when rock and soil slide quickly down a steep slope
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Crime: Mudflow Mudflow- the rapid downhill movement (EROSION) of a mixture of rock, soil, and water, usually after heavy rains
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Crime: Slump Slump- a large mass of rock and soil that suddenly slips (ERODES) down a slope in one big piece, usually due to the soil beneath it becoming soaked and soft
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Crime: Creep Creep- a very slow downhill movement (EROSION) of rock and soil, often due to freezing and thawing of water in rock below the soil
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Glaciers- any large mass of ice that moves slowly over land
Agent Glaciers $ 1 million Glaciers- any large mass of ice that moves slowly over land
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Types of Glaciers Continental Glaciers Valley Glaciers
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Crime: Plucking plucking- process of glacial EROSION where broken rock under the glacier freezes to the bottom of the glacier and is CARRIED to a new location
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Crime: Tarn Lake tarn lake - a lake created when a glacier plucks or rips large amounts of rock from the Earth, leaving a hole for a lake
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Crime: Abrasion abrasion- process of glacial EROSION where the rocks frozen to the bottom of glaciers scrape over the land, leaving scratches behind
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Crime: Moraine Till- the mixture of sediments that glaciers DEPOSIT
Moraine- till DEPOSITED at the edge of a glacier in a ridge
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IMPRINT FILLS WITH WATER
Crime: Kettle ICE A ICE SINKS B ICE MELTS C IMPRINT FILLS WITH WATER D Kettle- a small depression or imprint left in the land after a piece of a glacier breaks off and is DEPOSITED and left behind (often these imprints fill with water and become lakes)
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Crime: Esker Esker- the riverbeds left behind from meltwater rivers that ran through the bottoms of glaciers
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2 miles
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Crime: Erratics Erratics- LARGE pieces of sediment that a glacier plucks from the ground, carries, and deposits in new locations
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