This book investigates the geological formations and mineral resources of the central Canadian provinces of Ontario and Quebec. Authored by E. J. Chapman, a figure likely knowledgeable in the field given the era of publication, the work aims to systematically document the earth sciences of this significant geographical region. It presents a foundational understanding of the area's geological history and its mineral wealth.

As a historical geological survey from 1888, this work likely served as a foundational text for understanding the mineralogy and geology of central Canada. Its value today lies in its historical perspective on scientific inquiry and resource mapping of the era. The detailed regional focus suggests it was intended for geologists, mining professionals, and regional planners of the time.