Stone rings, pingoes, and rock glaciers and other activity became more common during ice ages.

Periglacial

Stone rings, pingoes, and rock glaciers and other periglacial activity became more common during ice ages.

Periglacial activity is a geomorphic process that occurs due to periodical defrosting of snow in regions of permafrost (frozen ground), the runoff which becomes frozen again in ice wedges and other structures. During periglacial activity, there is a regular fluctuation of air temperature across zero degree Celsius, and the process influences the landscape in a significant way.

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

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mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

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