Reply. Denudational isostatic rebound of intraplate highlands: The Lachlan river valley, Australia

Abstract

AbstractTwo main points are raised in replying to Fabel et al. (1993) in their discussion of the paper by Bishop and Brown (1992). It is argued that local variations in denudation are insufficient to invalidate the key conclusions, especially as the amount of sediment deposited in the Murray Basin is a key (and known) measure of the amount of denudation. The total evidence for rebound is now known to be regional in extent, supporting the relevance of a regional isostatic model. We note that isostatic rebound need not to be continuous, so that evidence of episodic rebound does not conflict with it, and that a lack of isostatic rebound would require a strongly opposing active tectonic regime. That is, a key general conclusion is that denudational rebound should always be assessed as an explanation for uplift before active tectonism is invoked.