Twidale, C.Bourne, J.2009-12-012009-12-012008Chikei/Transactions, Japanese Geomorphological Union, 2008; 29(2):131-1470389-1755http://hdl.handle.net/2440/54160The piedmont angle is basically due to intense weathering first low on the hillslope and then to weathering and erosion in the scarp-foot zone so created. Structural factors contribute but weathering and erosion have created scarp-foot nicks and depressions in homogenous bedrock. Once developed such basal erosion produces and maintains steep slopes and scarp recession. Coarse weathered debris induces gully gravure, and protective veneer and false cuestas. Where the country rock weathers to fines the piedmont angle is abrupt but simple. However, slope morphology varies with regional factors. On northern Eyre Peninsula, for instance, the stabilisation of the plains by widespread calcrete accumulations, and the insulation of the area against exoreic surface drainage by coastal barriers, together have negated and retarded the more usual slope developments.enJournal article00200836332-s2.0-4444917500141285