Chalossian is an industry of

flint Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Flint was widely used historically to make stone tools and sta ...

tools from the Stone Age. Paul Bovier-Lapierre discovered it in

Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Med ...

.E. Passemard , P. Dubalen , A. Vayson de Pradenne , R. Neuville, La Question Chalossienne, Bulletin de la Société préhistorique française, 1931, Volume 28, Issue 6, pp. 289-293
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References

Lower Paleolithic Archaeological cultures of Africa {{Egypt-stub