I.—The Parallel Roads of Glen Roy

Extract

Last summer I paid a visit to the Parallel Roads of Glen Roy, and saw certain features which must, I think, have hitherto escaped notice. It has been asserted that the roads consist of, or are cut out of, mere superficial detritus; and that they never appear where the solid rock appears; and much discussion has arisen as to the mode of formation of the roads on this supposition, viz. that they consist of detritus merely.