The Parallel Roads of Glenroy: Their Origin and Relation to the Glacial Period and the Deluge (Classic Reprint)

Excerpt from The Parallel Roads of Glenroy: Their Origin and Relation to the Glacial Period and the Deluge

In these unsatisfactory circumstances my paper was laid on the shelf, where it would probably have remained had not the appearance of Professor Prestwich's Monograph revived my interest in the ques tion. This distinguished geologist adopts the glacial-lake view as affording the most satisfactory solution of the problem, but suggests a somewhat different interpretation of the build of the barriers and the formation of the roads. According to his View the hills were covered with a coating, several feet thick of local angular fragments mixed with sand and clay, the product of the great ice sheet. But to explain the modus operandi, I had better cite the account given of the supposed formation of the middle road. On the bursting of the ice barrier in Glen Glaster the glacial lake necessarily fell to the level of the col at the head of that. Glen.

As the lake fell rapidly, says the Professor, and exposed this detrital bank, the saturated mass of debris would part with its water.

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