Wednesday, 4 November 2015

In 1924 a report of Stromatolites in Nepean Sandstone by Dr. Morley E. Wilson of the Geological Survey of Canada, and Other Reports of Stromatolites and Biofilms in the Potsdam

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At the end of this blog posting I’ve provided a list of articles discussing stromatolites and biofilm structures in Potsdam (Group) Sandston...
Monday, 26 October 2015

A Good Year to Look at the Stromatolites along the Ottawa River - Part 2, near Dunrobin

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The water level of the Ottawa River is still low.  As a consequence outcrops that form the river bed are visible and accessible.   Below are...
Thursday, 22 October 2015

Soft-Sediment Deformation (Seismites) in Nepean Sandstone Close to the Rideau Lake Fault

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Soft-sediment deformation structures are deformations that occur in sediments that have not undergone lithification before the deformation s...
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Thursday, 1 October 2015

A Good Year to Look at the Stromatolites along the Ottawa River

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We were blessed with a fairly dry summer in Eastern Ontario.  As a consequence  the Ottawa River is low and it is a very good year to look a...
Monday, 28 September 2015

A Map Showing the Location of Cylindrical and Conical Structures in Potsdam (Group) Sandstone of Ontario and New York

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The locations in New York State are mainly based on Field Trip Guidebooks issued at Annual Meetings of the New York Geological Associati...
Tuesday, 1 September 2015

Franklin B. Hough, M.D. (1822-1885), the First to Write on Cylindrical Structures in Potsdam Sandstone

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This blog posting is written to right an historical wrong.  The wrong or slight that needs to be corrected is the failure to acknowledge tha...
Thursday, 27 August 2015

Cylindrical Structures in Potsdam Group Sandstone in Eastern Ontario - Part 2

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My blog posting from January 29, 2014 provided an introduction to cylindrical structures found in Potsdam Group sandstone of Eastern Ontario...
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