Geoecological research in the Rocky Mountains

Book reviewed in this article:
Jack D. Ives (ed.): Geoecology of the Colorado Front Range: A Study of Alpine and Subalpine Environments     

Dendroclimatology

Books reviewed in this article:
Hughes, M. K., Kelly, P. M., Pilcher, J. R., & LaMarchc, Jr., V. C. (eds.) 1982: Climate from Tree Rings     

The Great Basin in focus

Book reviewed in this article:
Madsen, David B. & O'Connell, James F. (eds.) 1982: Man and Environment in the Grear Basin.     

Degree of rock surface weathering on fjell summits in northern Finland: implications for the thermal regime of the last ice sheet

Measures of degree of rock surface weathering on three fjell summits in Finnish Lapland provide an independent test of the extent of continuously cold-based ice during the Late Weichselian. The surface hardness of exposed surfaces is compared with that of surfaces that have remained covered and protected from subaerial weathering. Roughness measurements from granite gneiss surfaces are compared with results from similar lithologies that are known to have been eroded during the Late Weichselian. The results suggest that the summits have been covered and actively eroded by warm-based ice and are difficult to reconcile with suggestions that large parts of Fennoscandia have not been glacially abraded since the Early Weichselian.