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TRAVELS
IN
NORTH AMERICA,
IN THE YEARS 1841-2;
WITH
GEOLOGICAL OBSERVATIONS
ON
THE UNITED STATES,
CANADA, AND NOVA SCOTIA.
BY CHARLES LYELL, ESQ., F.R. S.
AUTHOR OF THE PRINCIPLES OF GEOLOGY.
IN TWO VOLUMES.
VOL. II.
NEW-YORK:
WILEY AND PUTNAM, 161 BROADWAY.
CONTENTS OF VOLUME II.
CHAPTER XIV.
Dr. Channing.-Agitation in Rhode Island.-Armed Conven-
tion.-Sail through Amboy Straits.-Journey to Philadel-
phia and Baltimore.—Harper's Ferry.-Passage over the
Alleghanies by National Road.-Parallel Ridges.-Absence
of Drift.-Structure and Origin of Appalachians.-Theory of
Subsidence and Contraction of Subterranean Fluid.-Ken-
tucky Farmers.-Emigrants.-Cumberland Coal Field.-Clay
with Stigmaria.-Marine Shells in Coal-Measures near
Frostburg.-Wide Geographical Distribution of Fossil Coal
Plants....
PAGE.
1
CHAPTER XV.
Alleghany Mountains.-Union.-Horizontal Coal Formation.-
Brownsville on the Monongahela.—Facilities of Working
Coal.-Navigable Rivers.-Great Future Resources of the
Country.-Pittsburg.-Illinois Coal Field.-Fossil Indian
Corn.-Indian Mounds near Wheeling.-General Harrison
on their high Antiquity.-Dr. Morton on the aboriginal In-
dians.-Remarks on the Civilisation of the Mexicans and
other Tribes.-Marietta.-Silicified Trees or Psarolites of
Ohio.-Coal of Pomeroy.-New Settlements.-Cincinnati.. 20
CHAPTER XVI.
Succession of Strata on the Ohio between Pomeroy and Cin-
cinnati.-Return up the Ohio to Rockville.-Waverley Sand-
stone.-Cliff Limestone.-Denudation.-Blue Limestone of
Cincinnati.-Lower Silurian Fossils.-Limited Proportion of
Silurian Species common to Europe and America.-Great
Development of Brachiopoda.-Deep Sea Formations.-Rar-
ity of Silurian Land Plants.-Silurian Fossil Fish.......
39