Queenston shale

Queenston shale

[′kwēnz·tən ′shāl]
(geology)
A red bed series from the Ordovician found in Niagara Gorge; it is composed of deltaic red shale.
References in periodicals archive ?
The Stonington Formation and Queenston Shale are present in the northeast corner of Mackinac County.
In a small area in northeastern Mackinac County, the Manitoulin Dolomite unconformably overlies the Stonington Formation, whereas the Manitoulin Dolomite overlies the Queenston Shale in the rest of the county.