Basalt of Staffa; Fingal's
cave,
Horizontal columns; "the
chimney" in St. Helena;
curved columns in New
South Wales,
Basalt pillars at Kiama point,
(Examples of trap rocks in
the United States,
Origin of columnar struc- ture in volcanic rocks; Watts' experiments on ba- salt,
Feldspathic varieties of trap
constitute central por-
tions, and basalt the exte-
rior of mountains; cause
of it,
Volcanic rocks-lava, its con- stituents and varieties,
Lava dikes; obsidian, pitch-
stone, scoria, pumice and
peperino,
found in other countries, 193 Interesting fossils; trilo-
Fossils, corals, pentacrinites,
Plants of the meiocene, zoo-
phytes and shells; fossil
tortoise and salamander, 269) osseous breccia,
Dinotherium, its structure,
Tertiary fossils of Asia, the
Sivatherium, Toxodon and
Macrauchenia of South
America,
The Pleiocene of England;
of the sub-Apennines,
Beds of lignite, paper coal,
animal remains,
Pleistocene, different uses of
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