| The middle member is dominated by gray silty shale grading upwards to bioclastic siltstone interbedded with bioclastic limestone. |
| Permian shale, sandstone, siltstone, limestone, sands, marls, and dolostones were deposited by sea-level fluctuations. |
| The red siltstone most likely represents deposition in shallow lacustrine and sabkha environments. |
| Often, the powdery azurite encloses a small grain of cuprite, forming a blue halo that disperses into the siltstone. |
| Angular depressions at the base of siltstone laminae represent casts of halite that was dissolved by lower-salinity waters that introduced silt. |
| The upper Gotham Member also comprises thinly interbedded mudstone, siltstone, and fine-grained calcareous sandstone. |
