Geology Reference
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Figure 12.23.
Irregular shore platform at Point Drummond, west coast of Eyre Peninsula, South Australia,
produced by the stripping of the 20 m thick regolith preserved in the promontory: an etch form.
of shallow angular depressions a few centimetres diameter and deep is typical of some granite
(and sandstone) coasts. It is not due to physical abrasion, to the impact of cobbles and blocks car-
ried by the waves, for there is no distributional relationship between the pecking and either expo-
sure to wave attack or to availability of coarse debris.
Bradley, W.C. 1963. Large-scale exfoliation in massive sandstones of the Colorado Plateau. Geological
Society of America Bulletin 74: 519-528.
Campbell, E.M. and Twidale, C.R. 1995. Lithological and climatic convergence in granitic morphology.
Cadernos Laboratorio Xeoloxico de Laxe 20: 381-403.
Demek, J. 1964. Castle koppies and tors in the Bohemian Highland (Czechoslovakia). Biulytyn Periglacjalny
14: 195-216.
Hills, E.S. 1949. Shore platforms. Geological Magazine 86: 137-152.
Hills, E.S. 1970. Fitting, fretting and imprisoned boulders. Nature 226 (5243): 345-347.
Hutton, J.T., Lindsay, D.M. and Twidale, C.R. 1977. The weathering of norite at Black Hill, South Australia.
Journal of the Geological Society of Australia 24: 37-50.
Lageat, Y. 1989. Le Relief du Bushveld. Une Géomorphologie des Roches Basiques et Ultrabasiques. Faculté
des Lettres et Sciences Humaines de L'Université Blaise-Pascal, Nouvelle Série, Fascicule 30.
Linton, D.L. 1964. The origin of the Pennine tors - An essay in analysis. Zeitschrift für Geomorphologie
8: 5-24.
Migon, P. and Dach, W. 1995. Rillenkarren on granite outcrops, SW Poland, age and significance.
Geografiska Annaler 77A: 1-9.
Mueller, J.E. and Twidale, C.R. 1988. Geomorphic development of City of Rocks, Grant County, New
Mexico. New Mexico Geologist 10: 74-79.
Netoff, D.I., Cooper, B.J. and Shroba, R.R. 1995. Giant sandstone weathering pits near Cookie Jar Butte,
southeastern Utah. In C. van Rieper III (Ed.), Proceedings of the Second Biennial Conference on Research
in Colorado Plateau National Parks (Flagstaff, Arizona, October, 1993). United States Department of the
Interior, National Parks Service. pp. 25-53.
Oberlander, T. 1972. Morphogenesis of granitic boulder slopes in the Mojave Desert, California. Journal of
Geology 80: 1-20.
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