Tropical stone lines and podzolized sand plains as paleoclimatic indicators for weathered cratons

Auteurs :
FAIRBRIDGE, R. W.
FINKL, C. W. Jr.

Description :
Consideration of contemporary environments where the genetic processes related to these features can be observed, implies several conditions for prior events in landscape evolution: (1) tropical stone lines may be interpreted as winnowed mudflows or lag deposits that reflect morphoclimatic events of brief duration (torrential rains) within an arid or semi-arid phase of pronounced global cooling| (2) within the present zone of the prevailing westerlies, stone lines may reflect periglacial activity during brief interstade fluctuations| (3) in lower latitudes the principal stone line, which commonly truncates saprolites, appears to be late Wisconsinan (Würmian) in age coinciding more or less with the pleniglacial phase| (4) the podzolized sands represent leached residuals and, accordingly, reflect extended intervals of leaching during the Pleistocene| and (5) the nature and distribution of podzolized sand plains indicates a pedogenic history of considerable variety and no brief episodicity as implied with stone lines.


Type de document :
Article de périodique

Source :
Quaternary science reviews Oxford, 1984, vol. 3, n°. 1, p. 41-72, Références bibliographiques : 178 réf.

Date :
1984