This report details the geological survey of specific regions in Quebec and Ontario, focusing on the rock formations, mineral deposits, and topographical features of the area. R. W. Ells, a geologist with the Geological Survey of Canada, presents findings based on field observations and sample analysis conducted during the survey. The work aims to provide a comprehensive understanding of the geological landscape to inform resource exploration and scientific knowledge of the region.

This report represents a foundational geological survey of a significant Canadian region, likely serving as a key reference for subsequent geological studies and resource assessments. Its detailed findings on stratigraphy and mineralogy would have been crucial for understanding the area's potential. The work is characteristic of the systematic, data-driven approach employed by geological surveys of the era, providing essential baseline information for scientific and economic development.