There have been more than 130 species of pollen that have been identified in the shale beds at Florissant.

This is the reason the arch is only a few metres high and does not extend further, where there are less shale beds.

This indicates the sandstones can be over 30 m thick and are separated by well-defined shale beds.

In the Carboniferous the shale beds generally exhibit higher resistivities than the sands.

This coal seam was about 5 feet thick, including an intermediate shale bed one foot thick.

On the other hand, there are widespread black shale beds from the mid-Cretaceous which indicate anoxic events but are not associated with mass extinctions.

Maricite is brittle, usually colorless to gray, and has been found in nodules within shale beds often containing other minerals.

Maricite has been found in nodules up to 15 cm long inside of the shale beds.

Characteristic shale beds within the Jalama are dark gray to black, micaceous, and often carbonaceous.

It is a purple-red limestone with a few interspersed yellow-green shale beds.