Ontario's Historical Plaques 

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Palisades of the Pijitawabik

Palisades of the Pijitawabik

Photo by contributor Robert Griffin - Posted November, 2005

Palisades of the Pijitawabik

Photo from Google Street View ©2011 Google - Posted March, 2011

Palisades of the Pijitawabik

Photo by Alan L Brown - Posted November, 2005

Plaque Location

The District of Thunder Bay
The Municipality of Greenstone
At the scenic lookout on the east side of Highway 11
12 km south of Orient Bay
41 km north of Nipigon

Coordinates: N 49 20.039 W 88 07.447


Plaque Text

Here at Pijitawabik Bay and other Lake Nipigon localities ancient rocks of the Precambrian Shield were overlain by a diabase sheet formed approximately 1,200 million years ago. Erosion by water and ice removed the covering rocks and sculptured the sheet into rounded, flat-topped hills bounded by escarpments which rise in some places 152 metres above Lake Nipigon. The hills are separated by deep, narrow valleys. The towering pillars of the cliffs are the result of columnar jointing, a cooling phenomenon developed during the solidification of the magma. Frost action along the cracks in and around the columns causes splintering of the rock and occasionally the collapse of entire pillars, leaving the imposing palisades seen here.

Related Ontario plaque
Precambrian Shield


Greenstone Plaques

Here are the visitors' comments for this page.

> Posted August 9, 2009
What does the word Pijitawabik mean? I imagine it's a Native word indicating the type of rock formation?

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