QUANTIFYING UPLIFT AND EROSION ON THE COLORADO PLATEAU IN A GIS—YOUR INPUT REQUESTED
We have been building data bases that use: 1) late Cretaceous (85-74 Ma) coastal sandstone units, a proxy for paleo-sea level, to estimate Cenozoic rock uplift and net erosion; and 2) a reconstruction of an ~30 Ma (Oligocene) land surface created by tracing and reconstructing the Eocene/Oligocene stratigraphic boundary, using Oligocene volcanic rocks, and making inferences from river superposition to estimate post-Laramide erosion. Resultant mean values thus far are 2117 m for rock uplift and 406 m for net erosional exhumation over the entire Cenozoic, and 843 m of erosion since ~30 Ma.
This is a work in progress that should provide data that is openly available and useful for many lines of research, but WE NEED INPUT AND ADVICE FROM COLORADO PLATEAU RESEARCHERS. This poster presentation is an effort to foster discussion and tap into collective knowledge of the problems, the rocks, and the landscape in order to refine these databases.