Group shot posing in front of the dolomite breccia in Titus Canyon narrows

Jerry points out some evidence for solution collapse.

Sadly, our scheduled drive down Titus Canyon Road was canceled because the recent precipitation  made the upper section of the canyon impassable due to mud and snow.  Instead, we made a much shorter hiking trip up the canyon from Death Valley floor to see this spectacular megabreccia exposure of large clasts of Noonday Dolomite (blue-gray) suspended in a calcite (white) matrix.

The students came up with several innovative hypotheses for the formation of this outcrop, but we decided that most lines of evidence support the idea that this was the result of a very ancient cavern collapse after the deposition and subsequent burial.