Klimamorphologie der Massengesteine

Yates, E. M.; Wilhelmy, Herbert; Hempel, Leon

doi:10.2307/1791163

Cited by 1 publication

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“…The Origin of the Blockstreams The general character of the blockstreams, but especially their elongation downslope at a very low angle for such materials and the frequently sharply unconformable contact of the basaltic material with the decomposed granite place these features amongst the products of mass movements associated with periglacial conditions rather than amongst convergent forms found in tropical monsoonal areas such as Hong Kong (Wilhelmy, 1958).…”

Section: The Situation Of the Blockstrcamsmentioning

confidence: 99%

Some blockstreams of the Toolong Range Kosciusko State Park, New South Wales

Caine¹,

Jennings²

1968

Journal and Proceedings of the Royal Society of New South Wales

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Fuller investigation of the blockstreams of the Toolong Range has substantiated previous interpretation of them as part of a periglacial morphogenetic system of Upper Pleistocene age. Periglacial solifluction of blocks in a fine matrix appears to have been less important than movement with interstitial ice as matrix. This makes them akin to rock glaciers, though their meagre thickness must have prevented them moving in identical manner.Wood of Nothofagus cf. cunning hamii in quartz gravel beneath the head of one of the blockstreams was dated by C-14 to 33,000 B.C., yet it was accompanied by a pollen spectrum at least partially Tertiary in origin through reworking of presumed sub-basaltic sediments. The wood from a tree stool in situ relates to warmer conditions just prior to the periglacial phase.The basaltic regolith in the blockstreams and accompanying solifluction mantle implies a scarp retreat of about 33 m. since 33,000 b.c

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Section: The Situation Of the Blockstrcamsmentioning

confidence: 99%