REINTERPRETING THE STRATIGRAPHY OF THE FLORISSANT FOSSIL BEDS NATIONAL MONUMENT THROUGH CORRELATION BY MAGNETIC SUSCEPTIBILITY AND GEOCHEMICAL COMPARISON
The two sections that were analyzed displayed remarkable similarities and were easily correlated due to the high-resolution sampling in this study. They correlated especially well through the middle shale unit; however, the caprock conglomerate that appeared in one section was virtually absent from the other, but its stratigraphic location is suggested by magnetic susceptibility data. Both sections include a portion of the upper shale, but not the complete sequence.
This study also presents two scenarios supported by time-series for depositional duration and sedimentation rate for the lake beds. The precise stratigraphy that has been produced will be useful for all future studies of the Florissant Formation, and due to its temporal proximity to the Eocene-Oligocene boundary, may even be beneficial to understanding terrestrial response to climate change.