On the Occurrence of Silurian [?] Rocks in Forfarshire and Kincardineshire along the Eastern Border of the Highlands

Open Access
Publisher Website
Google Scholar
Abstract
I. The Mode of Occurrence of the Rocks Along the south-eastern border of the Highlands, between Blair-gowrie and Stonehaven, a remarkable group of rocks has been mapped in the course of the geological survey of that region. They occur as isolated lenticular strips, which intervene between the schistose rocks of the Highlands on the north-west and the boundary-fault that truncates the Old Red Sandstone on the south-east. The first and largest of these lenticular strips is about 20 miles long, extending almost from Cortachy in Forfarshire to about a mile beyond the Clattering Bridge in Kincardineshire. In the valley of the North Esk it is about ¾ mile broad, but elsewhere much narrower. The second lenticular mass begins at a point about a mile north of Drumtochty Castle, and stretches for 6 miles in a north-easterly direction to the Braes of Bervie. Part of a third strip is shown on the eastern margin of Sheet 66 of the 1-inch Geological Survey Map of Scotland, on the north side of the Highland Fault. The lenticular mode of occurrence of these rocks is due to the alternate approximation and recession of their northern margin from the great fault which everywhere forms their southern boundary. Notwithstanding the mechanical deformation which these rocks have more or less undergone, we are still able to ascertain their original characters and mutual relations. They may be arranged in two divisions, namely :—(1) the Jasper and Green-Bock Series; and (2) the younger Margie Series. An almost complete section

This publication has 0 references indexed in Scilit: