Note 252 — Chapter XXXVIII · THE BASALT-PLATEAU OF THE PARISH OF SMALL ISLES—RIVERS OF THE VOLCANIC PERIOD

Hay Cunningham remarks:—"In regard to the relations of the pitchstone-porphyry of the Scuir and the trap-rocks with which it is connected, it can, after a most careful examination around the whole mass, be confidently asserted that it exists as a great vein which has been erupted through the other Plutonic rocks—thus agreeing in age with all the other pitchstones of the island." Macculloch leaves us to infer that he regarded the rock of the Scuir to be regularly interstratified with the highest beds of the dolerite series (Western Isles, i. p. 522). Hugh Miller speaks of the Scuir of Eigg as "resting on the remains of a prostrate forest."—Cruise of the Betsy, p. 32.