geo lab 10

what is the definition of relief in a topographic map?

difference between the highest and lowest elevation in an area

how can you identify a lateral moraine on a topographic map?

ridges running parallel to sides of glaciers, often with closely spaced contour lines

what is a moraine?

ridge of glacial debris

what do contour lines with hachures represent?

depressions or sinkholes

what is stream gradient?

slope or steepness of a stream

what is a cirque?

depression formed by glacial erosion

what is the headwall of a glacial cirque?

highest cliff

what are tarn lakes?

mountain lake

“high-level ponds”

what is the gradient of a stream / creek?

measure of how steep the stream channel is

what do **asterisks indicate

places where bedrock is exposed

what do name including the word “ledge” mean?

exposed bedrock

what do areas bounded by jagged lines indicate?

areas of bedrock or near bedrock

what do areas with stipples with no lines enclosing them represent?

areas of unconsolidated sediment

what is bathymetry?

topography of the seafloor

what does roche moutonee mean?

hill produced by glaciation

smooth knob of bedrock streamlined by glacial ice and covered with glacial debris

what is a drumlin?

hill produced by glaciation
made up entirely of glacial material and has been shaped by the movement of the ice

what are kames?

stratified ice contact deposits

what is an outwash plain?

flat or gently sloping landscape formed by meltwater from glaciers depositing sediment

what are dunes?

mounds of sand created by wind

what is a birdfoot delta?

a delta at mouth of Mississippi River where the river branches into three main channels

what are distributary channels?

branches of a river that flow away from the main channel

what are arroyos:

channels occupied by streams only some of the time