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Caledon Lake

Caledon Lake and the areas adjacent to it are located on a glacial spillway, comprising a deposit of peat, muck and marl. Marl is a lime-rich mud or mudstone, often found in post-glacial lake bed sediments.  Marl was a key ingredient of cement in the early twentieth century. In 1908, the Superior Portland Cement Company began extracting marl from the swamplands northwest of the lake, excavating channels 300 feet long, 150 feet wide, and 40 feet deep.


-Courtesy of Heritage Caledon


 


 
Photos:

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1. 
1. Caledon Lake
Documents:

Caledon Lake Marl - OMNR
Excerpt from Cowan, W.R. 1976. Quaternary Geology of the Orangeville Area, Southern Ontario: Geoscience Report 141. Ontario Ministry of Natural Resources.
Cowan, W.R.
1976
Information provided by the Caledon Community Mapping Project, a partnership of the Caledon Environmental Advisory Committee, Heritage Caledon and the Caledon Countryside Alliance.