We appreciate the opportunity to discuss our research, and are open to constructive criticisms of our publication. However, Schaffer appears to be using our work as an excuse to criticize all past geological work on either the Sierra Nevada or glaciated terrain in general. While we respond to the relevant comments, we feel that it is inappropriate to respond to specific points that are unrelated to our modeling study.

Schaffer has apparently misunderstood how a numerical model like ours works. Our style of geomorphic model explores the degree to which a logically linked set of mathematical representations of the relevant...

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