--'Quart. Journ.
Geol. Soc.,' vol. xxvi., 1870. Huxley.
(29) "Palaeontologica Indica"--'Memoirs of the Geol. Survey of India.'
(30) "On the Geological Position and Geographical Distribution of the
Dolomitic Conglomerate of the Bristol Area"--'Quart. Journ.
Geol. Soc.,' vol. xxvi., 1870. R. Etheridge, sen.
(31) "Remains of Labyrinthodonta from the Keuper Sandstone of
Warwick"--'Quart. Journ. Geol. Soc.,' vol. xxx., 1874 Miall.
(32) 'Manual of Geology.' Dana.
(33) 'Synopsis of Extinct Batrachia and Reptilia of North America.'
Cope.
(34) 'Fossil Footmarks.' Hitchcock.
(35) 'Ichnology of New England.' Hitchcock.
(36) 'Traite de Paleontologie Vegetale.' Schimper.
(37) 'Histoire des Vegetaux Fossiles.' Brongniart.
(38) 'Monographie der Fossilen Coniferen.' Goeppert.
CHAPTER XVI.
THE JURASSIC PERIOD.
Resting upon the Trias, with perfect conformity, and with an almost
undeterminable junction, we have the great series of deposits
which are known as the _Oolitic Rocks_, from the common occurrence
in them of oolitic limestones, or as the _Jurassic Rocks_, from
their being largely developed in the mountain-range of the Jura,
on the western borders of Switzerland. Sediments of this series
occupy extensive areas in Great Britain, on the continent of
Europe, and in India. In North America, limestones and marls
of this age have been detected in "the Black Hills, the Laramie
range, and other eastern ridges of the Rocky Mountains; also
over the Pacific slope, in the Uintah, Wahsatch, and Humboldt
Mountains, and in the Sierra Nevada" (Dana); but in these regions
their extent is still unknown, and their precise subdivisions
have not been determined.
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