The second place was Jedburgh,
where I found the vertical strata covered with the horizontal sandstone
and marl, as has been now described. The third place was the Tiviot, and
this is that which now remains to be considered.
Seeing the vertical strata in the bed of the river, I was desirous to
know if those were immediately covered with the horizontal strata. This
could not be discovered in the bed of the river where the rock was
covered upon the banks with travelled earth. I therefore left the river,
and followed the course of a brook which comes from the south side. I
had not gone far up the bank, or former boundary of the Tiviot, when
I had the satisfaction to find the vertical strata covered with the
pudding-stone and marly beds as in the valley of the Jed.
It will now be reasonable to suppose that all the schistus which we
perceive, whether in the mountains or in the valleys, exposed to our
view had been once covered with those horizontal strata which are
observed in Berwickshire and Tiviotdale; and that, below all those
horizontal strata in the level country, there is at present a body or
basis of vertical or inclined schistus, on which the horizontal strata
of a secondary order had been deposited.
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