Monday, 17 December 2012

“Perth stone” Purple-banded Sandstone From the Hughes Quarry, Lanark County, Ontario

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A distinctive purple-banded sandstone is featured in many residences and public buildings in Perth and in Lanark County that were construct...
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Sunday, 18 November 2012

An Iron Ore Deposit in the Potsdam Sandstone of Eastern Ontario: The Hematite Deposit Between Delta and Furnace Falls

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An early report that describes the rocks of Lanark County is the Report on the Geology of a Portion of Eastern Ontario by R.W. Ells that was...
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Monday, 5 November 2012

From Trails, to Mud Cracks to Evidence of Microbial Mats: Different Theories For Curved Lines in the troughs of ripple marks in Sandstone

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The above photographs shows curved lines in the troughs of ripple marks in sandstone. The ripple marks are evidence of wave action in an...
Friday, 19 October 2012

Mud cracks, Liesegang bands and Liesegang rings, and possible Soft-Sediment Deformation Structures in Sedimentary Rocks of Lanark County, Ontario in an Area Mapped as March Formation

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Added: November 30, 2012: Above I’ve provided photographs of brightly coloured and patterned beds of rock toge...
Monday, 15 October 2012

GSC Memoir 241 - Alice E. Wilson’s Reading List

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Growing up in Ottawa one of my earliest sources on the geology of the Ottawa area was an article by Alice E. Wilson entitled A Guide to the...
Tuesday, 9 October 2012

New Display of Dr. James Wilson’s Mineral And Fossil Collection at the Perth Museum

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On October 14, 2012 the Perth Museum at Matheson House on Gore Street in Perth, Ontario will be opening to the public its new Geology Exhib...
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Monday, 1 October 2012

Field Trip to Outcrops Near Perth, Ontario

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This posting is a field trip guide to outcrops in Potsdam Group sandstone near Perth that contain trace fossils. All of the outcrops can be ...
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