In The East, In
England, And In Other Parts Of Europe, Vast Marshes Existed In This Period,
And The Rank Vegetation Of These Marshy Areas Formed The Coal-Beds, With
Which The Carboniferous There Abounds.
It is only by the fossils found that
the periods to which the various strata belong are determined, and the
fossils, millions of which abound in the upper limestone, are clearly of
the Carboniferous epoch.
As these strata and this period bring us to the "rim" of the Canyon, it
might be easy to imagine that the processes of uplift and subsidence, and
deposition of more strata, as far as the Canyon region is concerned, now
cease. Such, however, is not the case.
Later Strata. As we go away from the Canyon, either north or east, we find
thousands of feet more of the later depositions, and the geologists affirm
that many of these at one time may have overlaid the Canyon region. There
is circumstantial evidence, amounting almost to proof, and Figure 3 of
plate facing page 99 suggests what that evidence is. It should be carefully
noted that the Canyon has been cut through the highest portions of a ridge,
which runs generally from east to west, and the slopes of which, therefore;
were north and south from the ridge. As one travels north from the Canyon,
he finds all the way along, for hundreds of miles, that he goes on a down
slope for a number of miles and then suddenly comes to the jutting edges of
slightly tilted strata (only 2 degrees) which make a cliff up which he must
climb.
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