In the geological structure of the peninsula of Nova Scotia there is evidence of volcanic action, glacial movement and changes of level, and at the present time a gradual subsidence is being repeated. We have evidence of the Pleistocene, Triassic, Carboniferous, Devonian, Silurian and Cambrian, and the granite boulders of Azoic time.
THE SILURIAN AREAS.
At Beech Hill, the ridges above Wolfville, Canaan, and up Angus Brook, afford excellent opportunity of studying what is as yet an imperfectly known formation. They include (1) the Dictyonema Websteri slates of Beech Hill and Angus Brook, occurring in hardened and cleaved red and green and mottled slates; (2) the Astroerium venustenu beds of lime rock which are undoubtedly newer in age, but also part of the Silurian system.
CARBONIFEROUS.
There are two formations at least in the vicinity of Wolfville. The shales and limestones and associated fossiliferous measures of the Horton formation and the granite sandstones and conglomerates underlying the former. The designation Avon formation has been assigned to the lower of these carboniferous sediments to distinguish them in the field.
TRIASSIC.
The red rocks of Evangeline Beach, the red sandstones and marls which overlap the silurian and carboniferous unconformably, belong to the triassic
