Glaciers

Front 1

Alpine (valley) Glaciers

Back 1

Flow downhill from where the snow and ice accumulates through mountains and existing valleys.

Front 2

Continental Glaciers

Back 2

A massive sheet of ice that cover millions of square kilometers

Front 3

Bergschrund

Back 3

Ice stuck to the mountain above

Front 4

Crevasses

Back 4

Cracks form in the ice as a result of movement

Front 5

Glacier

Back 5

Large sheets of flowing ice

Front 6

Zone of Ablation

Back 6

Lower part of a glacier where the amount of snow and ice that melts off is greater than the amount that accumulates

Front 7

Zone of Accumulation

Back 7

Upper part of a glacier where the amount of snow and ice that accumulates is greater than the amount that melts

Front 8

Erratic

Back 8

A piece of rock that differs from the size and type of rock native to the area in which it rests.

Front 9

Horn

Back 9

Two opposing glaciers meeting at an arete will carve a low, smooth gap

Front 10

Moraine

Back 10

Any glacially formed accumulation of unconsolidated glacial debris that occurs in both currently and formerly glaciated regions on Earth

Front 11

Arete

Back 11

Thin, knife-like ridge of rock which is typically formed when two glaciers erode parallel U-shaped valleys.

Front 12

Kettle

Back 12

Shallow, sediment-filled body of water by retreating glaciers or draining floodwaters

Front 13

Interglacial Period

Back 13

Geological interval of global warming average temperature lasting thousands of years that separates consecutive glacial periods within an ice age

Front 14

Ice Age

Back 14

Glacial episode during a past geological period

Front 15

Precession

Back 15

Variations in the earth's eccentricity, axial tilt, and precession compromise the three dominant cycles, known as the Milankovitch Cycles

Front 16

Glacial Period

Back 16

Polar and mountain ice sheets were unusually extensive across the earth's surface

Front 17

Firn

Back 17

Partially compacted neve, a type of snow that has been left over from the past seasons and has been recrystallized into a substance denser than neve

Front 18

Till

Back 18

Part of the glacial drift deposited directly by the glacier

Front 19

Snowfield

Back 19

Permanent wide expanse of snow in mountainous or polar regions

Front 20

Esker

Back 20

Formed within ice-walled tunnels by streams which flowed within and under glaciers

Front 21

Glacial Lake

Back 21

Lake with origins of a melted glacier

Front 22

Snowline

Back 22

The altitude above which some snow remains on the ground in a particular place throughout the year

Front 23

Cirque

Back 23

Amphitheatre -like valley formed by glacial erosion

Front 24

Ice Shelf

Back 24

Floating sheet of ice permanently attached to a landmass

Front 25

Iceberg

Back 25

Formed where glaciers, ice sheets, or ice shelves meet the ocean, ice breaks, or calves, off into sea