This book investigates the geological formations and history of the Montreal region. Henry Marc Ami, a geologist and paleontologist, draws upon his expertise to present a comprehensive overview of the area's geological past. The work aims to detail the bedrock, surficial deposits, and paleontological significance of Montreal.

The Authority Perspective: Published in 1897, this work represents an early, detailed geological survey of Montreal. Its value lies in its historical perspective and the foundational data it provided for subsequent geological studies of the region. The text is likely to be of interest to geologists, historians of science, and those studying the specific natural history of Montreal.