Geological Magazine, Volume 7; Volume 37; Volume 7, Issue 427

Afon appears augite Bala Bala Lake beds biotite borolanite British Museum calcareous carapace Carboniferous Cassian character clay Coll colour Conocoryphe contains Cretaceous D'Orb deposits described Devonian district dolomitic dykes earthquake Egypt Eocene evidence fault fauna felsitic felspar figured Foraminifera formation fossils genera genus Geol GEOLOGICAL MAGAZINE Geological Society Geological Survey geologists Gharib lighthouse gravel groove hornblende igneous Island Issel Jebel Abyad Journ Kosseir lake Lamarck later Libyan Series limestone Linnæus London Lower margin miles mineral Miocene Mokattam Series Nummulites occur ocean Olenus origin orthoclase Paleontology Paleozoic paper plagioclase plates Pliocene portion posterior present probably Professor pygidium quartz Raibl raised beach Red Sea Reuss ridge River rocks Salter sand Sandstone Schwager shales shells shows side Silurian Sinai species specimens strata structure surface Surv Tertiary Upper valley volcanic Wadi Gueh Woodward zone