Part Ii.—Tectonics.

SECTION VIII.—FAULTING AND FOLDING—

Origin of depression. Evidence in drainage ravines El Bats and El Wadi. Deep boring at Medinet el Fayûm. Dr. Blanckenhorn’s theory that depression owes its origin to extensive fault system. Fault theory disproved. Fault N.N.E. of Qasr el Sagha. Numerous local strike faults of small throw. Occasional influence of fractures in determining escarpments 29