The holotype, FRDC-GSJB-99, was found in layers dating to the Aptian-Albian.

The holotype, USNM 2411, was found in a layer dating from the Campanian.

The holotype, IGM 100/111, was found in layers dating from the Cenomanian-Santonian.

Research works on the painted decoration inside the mosque carried out in the 1964/1965 revealed five painted layers dating from various periods.

Investigations revealed three layers of occupation, with the final layer dating to the Late Classic and the earlier levels to the Preclassic.

It was also the first gas discovery made in geological layers dating back to the Oglio-Miocene era in the up-until-then little-explored Levant basin of the Eastern Mediterranean.

Research there uncovered, in a layer dating to the 11th millennium BC, obsidian originating from Milos.

Analyzing pollen and spores in layers dating before the meteorite impact, they found a wide variety of plant life, including conifers and other gymnosperms, ferns, and flowering plants or angiosperms.

Between March 1869 and June 1870 Professor John Phillips, further investigating the site, in a layer dating from the Bathonian uncovered three skeletons and additional bone material.

A cave in the vicinity contained a deep Middle Palaeolithic deposit that was covered by a Natufian layer dating to about the 9th millennium B.C.