Many species of
(or St Cassian). < _Orthoceras_. True _Ammonites_,
| besides _Ceratites_ and
| _Goniatites, Belemnites_ (rare),
| _Porcellia, Pleurotomania, Trochus_,
\ _Monotis salinaria_, &c.
/ A. Black and grey \ Among the fossils
4. A. Guttenstein beds. | limestone 150 feet | are _Ceratites_
B. Werfen beds, base | thick, alternating | _cassianus_,
of Upper Trias? | with the underlying | _Myacites_
Lower Trias of < Werfen beds. > _fassaensis_,
some geologists. | B. Red and green | _Naticella_
| shale and sandstone, | _costata_, &c.
\ with salt and gypsum./
In the United States, rocks of Triassic age occur in several
areas between the Appalachians and the Atlantic seaboard; but
they show no such triple division as in Germany, and their exact
place in the system is uncertain. The rocks of these areas consist
of red sandstones, sometimes shaly or conglomeratic, occasionally
with beds of impure limestone. Other more extensive areas where
Triassic rocks appear at the surface, are found west of the
Mississippi, on the slopes of the Rocky Mountains, where the
beds consist of sandstones and gypsiferous marls.
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