Georges Le Mesle was a geologist, paleontologist, correspondent of the National Museum of Natural History and member of the Scientific Commission of Tunisia.
[4] The botanist Ernest Cosson led the Mision Scientifique de Tunisie (Tunisian Scientific Exploration Mission) from 1885 to 1887.
[3] In 1888 Le Mesle published the results of his first exploration, which took place in April–June 1887, in the form of a daily journal that recorded minor facts and incidents of the journey along with scientific observations.
Le Mesle made some preliminary trips around Tunis, then studied the peninsula of Cap Bon, which based on his observations formed an archipelago at the start of the Quaternary and did not become part of the continent until quite recently.
[8] The foraminifera belonged the same genera as those found in chalk of the Paris basin, such as Globigerina, Textularia, Orbulina and Rotalina.
[8] At Djebel Zaghouan in Tunisia Le Mesle found Jurassic terrain in which Kobelt had discovered Perisphinctes Kobelti from the Oxfordian age.
[10] In 1888, since Rolland had not been able to complete his investigation of the center, Le Mesle resumed his itinerary between Zaghouan and Kairouan in April, May and June.