Gebel Manzal el-Seyl is Early Dynastic volcanic tuff quarry .
Sources:
- https://per-storemyr.net/2012/12/28/ten-quarries-of-ancient-egypt-6-gebel-manzal-el-seyl-volcanic-tuff-quarry
- Harrell, James A., et al. “An Early Dynastic Quarry for Stone Vessels at Gebel Manzal El-Seyl, Eastern Desert.” The Journal of Egyptian Archaeology, vol. 86, 2000, pp. 33–42. JSTOR https://www.jstor.org/stable/3822304
- James A. Harrell, A stone vessel quarry at Gebel Umm Naqqat: Egyptian Archaeology, vol. 24 -2004, pp. 34-36
