Onaping Map-Area (Classic Reprint) - Hardcover

William Henry Collins

9780266920199: Onaping Map-Area (Classic Reprint)

Hardcover

ISBN 10: 0266920195 ISBN 13: 9780266920199

Publisher: Forgotten Books, 2018

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Explore the geology of the Onaping map-area and the banded, cherty quartzite that marks a key boundary in northeastern Ontario.

This concise field-minded study presents the processes that shaped the Gowganda and Cobalt regions, focusing on how different rock types—from greywacke to quartzite—relate as layers were deposited, eroded, and later deformed. It emphasizes how a distinctive quartzite variety behaves in contact with older rocks, and how pre-Huronian surfaces influence what explorers see today.

Learn how the banded cherty quartzite was identified and distinguished from the Lorrain quartzite, and what its texture and mineral make-up reveal about its origin.
See how the base of the Lorrain quartzite varies across areas, including direct rests on granite or greywacke and evidence of subaerial exposure before deposition.
Understand the relationship between the Lorrain quartzite and the Gowganda formation, including contact patterns, erosion indicators, and brief interruptions in sedimentation.
Get a sense of the structural and stratigraphic context that guides exploration, including pre-Huronian surfaces and the major unconformities that shape interpretation.

Ideal for readers of geological maps, field reports, and mineral exploration references who want a clear, map-based picture of Ontario’s ancient crust and its pathways for ore formation.

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