Antarctic Soils and Soil Forming Processes by J.C. F. Tedrow

By J.C. F. Tedrow

About The Product

Published by way of the yank Geophysical Union as a part of the Antarctic examine Series.

Are there, in truth, any soils in Antarctica? this can be the query requested by way of laymen and pros alike.

It is seventy years or extra in view that guy first set foot at the antarctic continent, and through this time explorers, naturalists, geologists, and others have given us substantial info on many ice-free parts and feature photographed and mapped a substantial component of the continent. merely in the final ten years, despite the fact that, have the 1st systematic pedologic reviews been undertaken. even if the observations of those initial reports are very important and illuminating, wisdom of pedologic tactics as a complete at the antarctic continent has now not complicated a lot past a 'statement of the problem.'

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DenskjSld,1911]. It is the writer's impression,as a result of both field work and reading, that nivation cirques are Depth to Perma]rost much more common in northwest Greenland and perhaps also in Iceland and Spitzbergen [Lewis, 1939; McCabe, 1939] than in the McMurdo Sound area of Antarctica. If so, less snowfall and lower temperatures in Antarctica may be responsible. These factors would increase the wastage of snow by sublimation and decreaseit by melting. 9 cm. 1 cm. They are found in fill, in glaciofiuvial,lake, and deltaic sediments,and in eolian and beach deposits.

Great vertical extent. Fig. 40. A ventifact, Wright Valley, Victoria Land, AntThe following factors favored the unusual develarcfica. opment of ventifac•s in the Wright Valley: (1) The area is devoid of vegetation. (2) The depositson Eolian sand sheets are found at several places which the ventifacts are found are old. (3) The in the Wright Valley. Most of them cover several snowfall is light. (4) The winds are s•rong. (5) acres but only thinly vcnccr the underlying glacial There is enough sand to do the cutting but not deposits.

They are winter windsare topographicallycontrolled,whereas commonly characterized by knob and kettle topography. Some of the kettles contain superglacial at Marble Point they are not so controlled. pools,ponds,and lakes. 'Alph Lake' in the ice-cored Most of the grains and flakes blown from blocks of marble and other rapidly weathering rocks are on the north sides of the blocks. (4) The largest snowdrifts, when seen early in the spring, are on the moraine LAKES on the northwest side of the Koettlitz Glacier is the largest of these.

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