<span>Answer:
Valley glaciers form cirques, arrettes and U-shaped valleys in mountainous areas cold enough to support glaciers. U shaped valleys: they are the path of an alpine glacier. Glaciers carve out valleys with steep sides and flattish bottoms
Cirques. A hollowed out basin where a glacier begins to form
Arrrete: A ridge formed by cirques on either side of a rock mass
Horn: a mountain with cirques on three or more sides. It looks kinda like a pyramid. The matterhorn in Switzerland is a great example
morraine: A hilly ridge of material deposited by the glacier marking how far it advanced. A terminal morraine is the maximum advance of a glacier, a recessional morraine marks the advance of a glacier, but not the maximum advance. A lateral morraine is a morraine deposited on the side of a glacier.
Erratic. A rock picked up and carried by a glacier and deposited elsewhere
tarn: a lake that forms in a cirque
fjord: A U shaped valley that is flooded by ocean water</span>
Between 1931 and 1940 a ton of soil blew out of the central and southern great. It was a period of severe dust storms that greatly damaged the ecology and agriculture during the 1930s.
I believe that the discovery of new artifacts can bring many improvements to historical interpretations along with additional information for understanding historical facts. Thus, new causes can be found and analyzed that could lead to a certain phenomenon.
