Abstract
One of the most instructive sections of the crystalline rocks composing the Grampian Mountains is seen at the termination of that chain on the coast of Kincardineshire, between Stonehaven and Aberdeen. Having found this section to differ in some important points from the structure usually ascribed to these mountains, I now offer a short account of it to the Society. The section at p. 547 is only intended to illustrate the general position of the strata without entering into minute details. Commencing with the southern portion of the section, the first rock is the Old Bed Sandstone ( a ) forming part of the great formation which underlies the Scottish coal-field. It is well seen on the coast in this district, where it is quarried near Stonehaven. This rock is often described as evidently made up of the detritus of the mountains on the north, but its mineral characters in this place hardly bear out the statement.

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