Chapter 14 Glacial & Periglacial Landscapes

Question 1

Glaciers

Answer 1

Large body of ice
continuously moving.
Two Types:
Alpine: Greenland Continental: Antarctica

Question 2

Glaciers:

Above Snowline

Answer 2

Snow often does not melt entirely

Question 3

Glaciers:

Below Snowline

Answer 3

Snow melts away during summer

Question 4

Glaciers:

Firn

Answer 4

Granular ice
Older, partly compacted snow
The result of repeated melting and freezing or snow

Question 5

Glacial Ice

Answer 5

Compacted firn

Results in very dense ice

Question 6

Alpine Glaciers

Answer 6

Exist in valleys in mountain ranges

Named after Alps in Europe

Question 7

Continental Glacier

Ice Sheets

Answer 7

Greenland Ice Sheet
Covers almost the entire island and is
almost two miles thick
Cover vast areas 
(Example: Antarctica)

Question 8

Glaciers:

Zone of Accumulation

Answer 8

Upper portion of glacier

Ice is added, and accumulates

Question 9

Glaciers:

Zone of Ablation

Answer 9

Lower portion of glacier
Ice is removed through:
Melting, Deflation (wind), Calving, and Sublimation. Glacier National Park, MT

Question 10

Glacial Erosion:

Glacial Plucking

Answer 10

The breaking-off and removal of rock from a glacier.

Question 11

Glacial Erosion:

Abrasion

Answer 11

The scraping away of rock, by rocks being transported by a glacier
Glacial striations and polish result

Question 12

Glacial Erractic

Answer 12

Boulder transported by glacier

Question 13

Ice Ages:

Glacial Period

Answer 13

Period with lower temperatures
Glaciers grow or are created
Sea level drops as water is
incorporated into glaciers

Question 14

Ice Ages:

Interglacial Period

Answer 14

Currently in an interglacial period
Period with higher temperatures
Glaciers melt and retreat
Sea level rises as glacial meltwater enters ocean

Question 15

Glacial Erosion:

Drift

Answer 15

Rock material transported by a glacier

Question 16

Glacial Erosion:

Stratified Drift

Answer 16

Sorted by size

Carried by meltwater

Question 17

Glacial Erosion:

Unstratified (Till)

Answer 17

Unsorted

Carried by glacier itself, not by meltwater

Question 18

Alpine Glaciers:

U-shaped valley

Answer 18

Results from glacial
erosion
Example: Yosemite Valley

Question 19

Alpine Glaciers:

Cirque

Answer 19

Bowl shaped depression near the upper end of glacier

Question 20

Alpine Glacier:

Arête

Answer 20

Jagged rock wall separating two cirques

Question 21

Alpine Glacier:

Horn

Answer 21

Jagged peak separating several cirques

Question 22

Alpine Glacier:

Tarn

Answer 22

A lake that fills a cirque after a glacier has melted

Question 23

Alpine Glacier:

Paternoster Lakes

Answer 23

Small, circular lakes organized in a
stair-step pattern
Named after rosary beads

Question 24

Sea Ice

Answer 24

Ice in oceans
Pack ice
Formed from freezing seawater

Question 25

Icebergs

Answer 25

Body of continental glacier that has broken free to float on water
Thicker than sea ice
Float low in the water

Question 26

Continental Glacier

Answer 26

A much larger, flatter glacier (ice sheet)

Example: Antarctic Ice Sheet cover entire continent

Question 27

Pluvial Periods:

Paleolakes

Answer 27

Ancient Lakes
Examples:
- Pyramid Lake
- Mono Lake

Question 28

The opposite of the accumulation zone in a glacier?

Answer 28

Ablation Zone