1. A Map showing surface distribution of the Devonian in part of the Canadian Rocky Mountains with a reconstruction of the reef facies in the disturbed belt Yale Public content 1967. 2018-01-05T16:01:01Z. 2018-01-05T16:01:01Z. Woodhead, M. P. Published by the Alberta Society of Petroleum Geologists for the Devonian Symposium. English. cartographic image. Public. Alberta. Devonian and From 345 to 405 million years ago.