Chalk, analysis of, [91]
Chalk mollusca indicative of shallow water, [93]
Chalk sea, extent of, in Europe, [93]
Chalk-formation, land-plants found in, [94]
deposited in an inland sea, [93]
of Faxoe an ancient coral-reef, [94]
modern formation of, [95]
supposed oceanic origin of, erroneous, [96]
"Challenger" soundings and shore-deposits, [86]
"Challenger" ridge in the Atlantic, [101]