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Showing 1945 results

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Kupsch, Walter Oscar
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Mammoth tooth and mastodon tooth

Mammoth tooth (Elphas primigenius, lower left second generation molar) from near Qu-Appelle, Sask. Mastodon tooth from near Jansen, Sask (Anterior end of the left upper third molar of Mastodon americanus)

Block diagrams showing changes due to valley glaciation

Block diagrams showing changes due to valley glaciation. (A) Unglaciated mature topography. (B) A system of valley glaciers occupies the former stream valleys and causes deep erosion. Frost action causes weathering of unglaciated slopes and provides a source of debris for lateral moraines. (C) Climatic change causes melting and disappearance of glaciers, leaving behind tell-tale topography which includes hanging valleys. U-shaped valleys, lakes, end moraines, and rugged peaks.

Resultaten 151 tot 165 van 1945