Surveys in

French River

Photo: Geodoxa

The sculpted bedrock landscape of the French River area of Georgian Bay, Ontario has attracted attention for many years.  The suite of sculpted “s-forms” have been described individually in many locations and attributed to glacial erosion because they were closely associated with glaciated bedrock. However, the beautifully preserved Georgian Bay sites showed that these forms are analogous to erosional forms created by flow separations in fast-moving water and are elements making up an integrated landscape.  The role of the glacier is now seen to be as a confining medium generating extremely high velocity pressurized floods rather than a primary agent of erosion.  Geodoxa has captured UAV (drone) imagery of the French River area providing unprecedented perspectives on the suite of landforms. While you are waiting for our coming publication (Shaw, Sharpe & Leduc, 2021) you can read this landmark paper by Kor, Shaw & Sharpe published in 1991 (Get the PDF).

French River is an open-air museum

Much of the French River's rock has been preserved under the water of Georgian Bay since the Ice Age. 800 years ago, the level of the bay suddenly dropped, exposing many pristine s-forms. Remember that even hard granites of the Canadian Shield are weathered down by atmospheric alteration and the acid of the lichens. So, to better study s-forms we must dwell with sites where the bedrock has been preserved unaltered for 10 000 years just as it was after the disappearance of the ice sheet.

boton-g-mail-1.png
 

Site 1. Henvey Flat Island

boton-g-mail-1.png
French_river_GeoMap.jpg
 
French_river_GeoMap.jpg

Sites 2 &3: A world of potholes

Site 2. Henvey Inlet Potholes

boton-g-mail-1.png
 
boton-g-mail-1.png

Site 3. Giant potholes in Key River Inlet

French_river_GeoMap.jpg

A few hydraulic processes featuring potholes erosion

John Shaw explains potholes erosion

 
French_river_GeoMap.jpg

Site 4. Plucking Island

boton-g-mail-1.png
 

Site 5. Ilo Saari Island (Germain Island)

boton-g-mail-1.png
French_river_GeoMap.jpg
 
French_river_GeoMap.jpg

Site 6. Outer Fox Island

boton-g-mail-1.png

Site 7. "Cavitation Island" East of Puddick Island

boton-g-mail-1.png
French_river_GeoMap.jpg
 
 
French_river_GeoMap.jpg

Site 9. Bottle Island

boton-g-mail-1.png
 
French_river_GeoMap.jpg
boton-g-mail-1.png

Site 10. South Bustard Island

 
French_river_GeoMap.jpg

Site 12. Whitefish Bay

boton-g-mail-1.png
  • Facebook
  • Twitter
  • YouTube
  • Pinterest