We pass to the upper formation of the system. Over the belt of
mingled gray and red there occurs in the pyramid a second deep belt
of red conglomerate and variegated sandstone, with a band of lime
a-top, and over the band a thick belt of yellow sandstone, with
which the system terminates.[AN] Thus the second pyramid consists
mineralogically, like the first, of three great divisions, or
bands; its two upper belts belonging, like the three belts of the
other, to but one formation--the formation known in England as the
Quartzose Conglomerate. It is largely developed in Scotland. We
find it spread over extensive areas in Moray, Fife, Roxburgh, and
Berwick shires. In England, it is comparatively barren in fossils;
the only animal organic remains yet detected in it being a single
scale of the _Holoptychius_ found by Mr. Murchison; and though it
contains vegetable organisms in more abundance, so imperfectly
are they preserved, that little else can be ascertained regarding
them than that they were land plants, but not identical with the
plants of the Coal Measures. In Scotland, the formation is richly
fossiliferous, and the remains belong chiefly to the animal kingdom.
It is richly fossiliferous, too, in Russia, where it was discovered
by Mr. Murchison, during the summer of last year, spread over areas
many thousand square miles in extent. And there, as in Scotland, the
_Holoptychius_ seems its most characteristic fossil.
[Footnote AN: There still exists some uncertainty regarding the
order in which the upper beds occur. Mr. Duff, of Elgin, places the
limestone band above the yellow sandstone; Messrs. Sedgwick and
Murchison assign it an intermediate position between the red and
yellow. The respective places of the gray and red sandstones are also
disputed, and by very high authorities; Dr. Fleming holding that the
gray sandstones overlie the red, (see _Cheek's Edinburgh Journal_
for February, 1831,) and Mr. Lyell, that the red sandstones overlie
the gray, (see _Elements of Geology_, first edit., pp. 99-100.) The
order adopted above consorts best with the results of the writer's
observations, which have, however, been restricted chiefly to the
north country. He assigns to the limestone band the middle place
assigned to it by Messrs. Sedgwick and Murchison, and to the gray
sandstone the inferior position assigned to it by Mr. Lyell; aware,
however, that the latter deposit has not only a coping, but also a
basement, of red sandstone--the basement forming the upper member of
the lower formation.]
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