Security Briefing and Background Check

Investigative Terms to Know the process that BREAKS down rock WEATHERING

the process by which natural forces move or CARRY sediment from one place to another GROUND EROSION

the process by which agents of erosion deposit, or DROP sediment DEPOSITION

Agent Gravity $ 1 million Mass Movement- any one of several processes where gravity moves sediment downhill

Crime: Landslide Landslide- the most destructive form of mass movement EROSION when rock and soil slide quickly down a steep slope

Crime: Mudflow Mudflow- the rapid downhill movement (EROSION) of a mixture of rock, soil, and water, usually after heavy rains

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

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

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

Types of Glaciers Continental Glaciers Valley Glaciers

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

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

Crime: Abrasion abrasion- process of glacial EROSION where the rocks frozen to the bottom of glaciers scrape over the land, leaving scratches behind

Crime: Moraine Till- the mixture of sediments that glaciers DEPOSIT Moraine- till DEPOSITED at the edge of a glacier in a ridge

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)

Crime: Esker Esker- the riverbeds left behind from meltwater rivers that ran through the bottoms of glaciers

2 miles

Crime: Erratics Erratics- LARGE pieces of sediment that a glacier plucks from the ground, carries, and deposits in new locations