And his chronological scheme of formations was
founded on the mode of occurrence of the rocks within these narrow
confines."[34]
[Footnote 34: "History of Geology," p. 59.]
Werner had found the granites, limestones, sandstones, schists, etc.,
occurring in a certain relative order in his native country; and he drew
the very remarkable conclusion that this was the _normal_ order in which
these various rocks would invariably be found in all parts of the world,
on the theory that this was the order in which these different rocks had
been formed in the beginning, great layers of these different rocks
having originally been spread completely around the globe one outside
another like the coats of an onion. With this as a major premise, it is
not surprising that he and his enthusiastic disciples "were as certain
of the origin and sequence of the rocks as if they had been present at
the formation of the earth's crust."[35]
[Footnote 35: A. Geikie, "Founders of Geology," p. 112.]
The amusement with which this onion-coat theory is now regarded is
hardly appropriate in view of its universal vogue among geologists about
the beginning of the nineteenth century, and in view of the further fact
that a very similar and only slightly modified substitute theory has
been universally taught for three-quarters of a century _and still
prevails_.
Pages:
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109