Muskoka Potholes EarthCache
Muskoka Falls Sundogs: Not accessible anymore
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Welcome to an EarthCache. EarthCaches are interesting geographical features. There are no log books, Tupperware or trading items....just an interesting lesson to be learned. To log this earthcache, read below and answer the questions.
Potholes occur when water, under enormous pressure, drills one rock fragment into the bedrock. In Muskoka, the rocks are the oldest in the continent and very hard. Potholes are very rare in this landscape. They are normally are found in areas of softer rock. There are excellent examples of this type of glacial feature in the limestone base rocks of Hilton Falls Conservation Park and in the village of Rockwood in Ontario. This is a significant find in Muskoka!
These potholes are located northeast of Jevins Lake have been identified as an exceptional geological feature within the District of Muskoka .The potholes are clustered along the edge of a gneissic bedrock ridge, with the rims of two intersecting.
The deeper potholes are infilled with water and dead forest litter and presumably extend several meters beyond the water line. Based on their location, the potholes are probably sub-glacial in origin, created by the spinning action of stones as a major outburst of water flowed under the ice in late glacial times.
This earthcache is located on the south east side of Hwy 11 around Gravenhurst. Parking is off of Hewitt Rd on the east side of the highway.…..please don’t park along the highway. Walk along the hwy road allowance about 100 meters and then down an unopened road allowance to find this feature.
To log this EarthCache, determine the size of the two largest pothole openings and, relative to the exposed opening, determine the possible depth and email me the answer (via profile above) before logging.
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Treasures
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