Whitby formation upper Ordovician

The Upper Ordovician Whitby Formation overlies the Lindsay Formation of the Middle Ordovician Simcoe Group. The Lindsay Formation is a limestone with interbedded shaley units. The character of the contact with the overlying Whitby Formation is variable and may be an important control over the organic content of the lower part of the Whitby Formation. The Whitby Formation is overlain by interbedded limestone and shale of the Upper Ordovician Georgian Bay Formation. 

The Upper Ordovician Whitby Formation represents a transition from carbonate to shale deposition on a broad, shallow shelf. The Lower member—the Collingwood member—has the most potential for shale oil production. This member is an organic-rich marl or carbonate with considerable lateral variation along its subcrop trend from Manitoulin Island to the Toronto area. TOC values up... 

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See also in sourсe #XX -- [ ]

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