The Coconino Sandstone | Dr. John Whitmore

The Coconino Sandstone in the Grand Canyon has long been considered evidence of ancient desert dunes, but that interpretation clashes with Flood geology models. Dr. Whitmore presents evidence from a multi‑year project involving dozens of field excursions, lab analyses, and comparative studies that Coconino could instead have been deposited under water.

His findings challenge conventional deep‑time interpretations and highlight features suggesting rapid, catastrophic deposition. Dr. Whitmore shows how these findings present the Grand Canyon as a striking example of catastrophic processes rather than slow geological evolution.