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

Abstract

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.rhovement with interstitial ice as matrix.Periglacial solifluction of blocks in a fine matrix appears to have been less important than This makes them akin to rock glaciers, though their meagre thickness must have prevented thern moving in identical manner.Wood of Nothofagus cf.cunninghamii 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 im 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 33m.since 33,000 B.c.