June 11 - M. found Pinnacles Provincial Park in a guide to Quesnel, and we went walking there on Sunday morning. I enjoyed the wildflowers.
As we hiked along, we looked for the hoodoos for which the park is named. Hoodoos are tall thin spires of rock that protrude from the bottom of arid basins and badlands. They are composed of soft sedimentary and are topped by a piece of harder, less easily-eroded stone that protects the column from the elements. In common usage, the difference between hoodoos and pinnacles and spires is that hoodoos have a variable thickness often described as having a "totem pole-shaped body." We were surprised to find the hoodoos were below us.
Pinnacles Provincial Park protects a very unique formation of hoodoos. These hoodoos began their formation 12 million years ago, when molten lava flowing over the earth's surface cooled in flat basalt layers over older layers of ash and rock. The Ice Age followed, and when the ice mass receded, melt-water streams eroded the valley below Pinnacles Park. The hoodoos are formed from the effects of this natural erosion and weathering. The basalt is eroded away, revealing the more resistant ash layer, and often producing vivid bands of colour as individual basalt layers are removed. BritishColumbia.com