Blue Mountain Formation

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Blue Mountain Formation
Stratigraphic range: Maysvillian
TypeGeological formation
Sub-unitsRouge River Member
UnderliesGeorgian Bay Formation
OverliesLindsay Formation
ThicknessUp to 76 metres (250 ft)
OtherLimestone, siltstone
RegionSouthern Ontario,
Type section
Named forBlue Mountain
Named byW. A. Parks
Year defined1928

The Blue Mountain Formation, previously known as the Whitby Formation, is a geological formation of Upper Ordovician age (Maysvillian Stage), which outcrops in Ontario, Canada from Nottawasaga Bay southeastward to the Toronto area.[1][2]


  1. ^ "Blue Mountain Formation". WEBLEX Canada. Natural Resources Canada. Retrieved April 17, 2017.
  2. ^ Béland Otis, C. (2015). Upper Ordovician organic-rich mudstones of Southern Ontario : drilling project results (PDF). Sudbury: Ministry of Northern Development and Mines. pp. 8–9. ISBN 9781460669013.