Cambria and Ordovician strata formerly extend over the top of these mountains. The thickness of these deposits up to the crags, is at least 3730-5067 fathoms and the mountains are now a little more than 2000 feet high. It is probable that the mountains did not come into existence until after the Ordovician strata were deposited and before the Anticosti local beds were laid down. The igneous masses so well seen in the Bay of Islands and southward are of still later origin and are the probable cause for the meta- morphism seen in the strata of the southern half of the island. They are older than the Carboniferous as these strata are unaffected. The period of great deformation is as yet uncertain to me. The foreplain of the Low Range is a decided one and in places is deeply clef by the rivers. Today there is almost no erosion because as yet one have not seen a muddy river, All of the strata is held by the vegetation and the streams have no pedestals. Bridges exist here that in Ohio and Indiana would not stand six months. The foreplain therefore appears to be certainly as old as the Cretaceous and may be older.