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(Article of periodic en Anglais - 1983)

Document title

The riddle of the tors at Lauhavuori western Finland

Authors(s) and Affiliation(s)

SODERMAN G. ; KEJONEN A. ; KUJANSUU R. ;

Abstract

Seismic and drill-core surveys showed that the quartz sandstone superposes an unconsolidated, mechanically produced Upper Proterozoic weathering crust. Excavations and sedimentological analyses revealed that the local tors developed in coarse, porphyritic microcline granite as a result of cryptogenous chemical weathering of two-fold nature, in Cretaceous-Paleogene, and in Pliocene. The tors were exhumed in preglacial times, when modified by subaerial processes.

Source

Article of periodic

published at : Fennia Helsinki

Editor :

Millesime : 1983, vol. 161, no1 [pp. 91-144]

Bibliographic references : 174 réf.

Language

Anglais

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