WARM INTER-GLACIAL PERIODS.
Alternate Cold and Warm Periods.—Warm Inter-glacial Periods
a Test of Theories.—Reason why their Occurrence has not
been hitherto recognised.—Instances of Warm Inter-glacial
Periods.—Dranse, Dürnten, Hoxne, Chapelhall, Craiglockhart,
Leith Walk, Redhall Quarry, Beith, Crofthead, Kilmaurs,
Sweden, Ohio, Cromer, Mundesley, &c., &c.—Cave and River
Deposits.—Occurrence of Arctic and Warm Animals in some Beds
accounted for.—Mr. Boyd Dawkins’s Objections.—Occurrence
of Southern Shells in Glacial Deposits.—Evidence of Warm
Inter-glacial Periods from Mineral Borings.—Striated
Pavements.—Reason why Inter-glacial Land-surfaces are so rare 236