Cather (1999) reevaluated piercing lines created by depositional pinch-outs and truncations of Jurassic-Cretaceous strata across the Rio Grande rift to conclude that a minimal dextral offset of 85 km of these rocks postdates their deposition. His graphical depiction of the data and analysis of depositional trends and isopachs differ substantially from those of previous workers. These differences stem primarily from: (1) selective use of part of, not the entire, database; (2) drawing trend lines on the basis of one data point; and (3) mistaken interpretation of data points. To illustrate this, we reanalyze two Cretaceous shoreline trends presented by Cather,...

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