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

By J.C. F. Tedrow

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Published by means of the yank Geophysical Union as a part of the Antarctic study Series.

Are there, actually, any soils in Antarctica? this can be the query requested via laymen and execs alike.

It is seventy years or extra considering guy first set foot at the antarctic continent, and through this time explorers, naturalists, geologists, and others have given us huge info on many ice-free parts and feature photographed and mapped a substantial component to the continent. purely in the final ten years, in spite of the fact that, have the 1st systematic pedologic reports been undertaken. even though the observations of those initial experiences are vital and illuminating, wisdom of pedologic procedures as a complete at the antarctic continent has no longer complex a lot past a 'statement of the problem.'

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Extra info for Antarctic Soils and Soil Forming Processes, Antarctic Research Series, Volume 8

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R... ....... •-,•. ;•... Eolian southern sand sheets and dunes are found end of Bull Pass. Here at the dunes have dammed up a ravine cut in outwash deposits,and a small perennially frozen pond has bccn formed. The largest colJandepositin the McMurdo Sound area is just cast of Lake Vida in the Victoria Valley. It is more than 4 miles long and 1 mile wide, and barchans 50 fcct high and 300 fcct long are present [Webb and McKelvey, 1959; Calkin, 1964a]. Wind Direction Although in the Wright Valley the prevailing win•er winds are from the west, at Marble Point they are from the sou•h.

Wind Direction Although in the Wright Valley the prevailing win•er winds are from the west, at Marble Point they are from the sou•h. This is shown by the following: (1) Ventifacts are cut and polished only on their south sides. (2) The sand shadows which form in the lee of obstacles occur on the north sides. (3) Venti•acts Ventifacts are found near Marble Point, in the Taylor and Wright valleys, and elsewherein the McMurdo Sound area [P•w•, 1960b; Webb and McKelvey, 1959; Nichols, 1961b]. They arc unusually well developed and numerouson the older glacial deposits in •he Wright Valley [Nichols, 1961a] (Figure 40).

The kame moraine was formed during the summer season, when this sand was washed off the glacier by melt-water streams. Nivation Cirques Small nivation cirques formed in both bedrock and unconsolidated deposits are found in the coastal areas around McMurdo Sound (Figure 35). The snowbanks incise themselves the melt water derived into bedrock because from them increases frost- shattering,and in•o unconsolidateddepositsbecause the melt water forms alluvial conesand fans, solifiuction lobes and sheets,and sand flows [Nichols, 1963c].

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