This,
however, is not the case with the Jed, which is to the southward of the
Tiviot; that river, in many places, runs upon the horizontal strata, and
undermines steep banks, which falling shows high and beautiful sections
of the regular horizontal strata. The little rivulets also which fall
into the Jed have hollowed out deep gullies in the land, and show the
uniformity of the horizontal strata.
In this manner I was disposed to look for nothing more than what I had
seen among those mineral bodies, when one day, walking in the beautiful
valley above the town of Jedburgh, I was surprised with the appearance
of vertical strata in the bed of the river, where I was certain that
the banks were composed of horizontal strata. I was soon satisfied with
regard to this phenomenon, and rejoiced at my good fortune in stumbling
upon an object so interesting to the natural history of the earth, and
which I had been long looking for in vain.
Here the vertical strata, similar to those that are in the bed of
the Tweed, appear; and above those vertical strata, are placed the
horizontal beds, which extend along the whole country.
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