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.
To reach this Earthcache, take Stevens Avenue South until reach the locked gate. There is parking available before the gate. Although the gate says "enter at your own risk", the road is a well used by people walking their dogs or people jogging. Walk until you are actually gone past where your GSP (or Smart Phone is telling you where to enter the bush. Too much bush here - no need to bushwack. Continue down the road about 80-100 metres and you will reach a well worn trail to the right leading you down to the lake and The Lagoon. Near the bottom, the trail splits - take the one to the right to the shoreline and then North along the shore to the pothole location.
During the winter, the EarthCache location will be covered in snow such that you will not be able to take any measurements.
The Lagoon Pothole can be found nearby at Posted Coordinates. Be careful near the edge of the Pothole - it is quite a drop.
If you walk along the shore of Lake Superior, you may be able to find other potholes in this area. The Lagoon Pothole is the largest, I have encountered on the Lake Superior shoreline
"Potholes – Potholes form where a rock (or many rocks) is spun around in the same spot by circular eddy of water. The constant abrasion begins to wear away the bedrock into a hole. Once started, the feature is self-reinforcing as the hole creates an even stronger eddy. The rock being spun in the hole is called a grinder and as one grinder wears away another rolls in to fill its place. Most of the work is done during periods of high flow/flood events when the velocity of the water is best able to move the grinders."
From “www.encyclopedia.com › ... › Geology and Oceanography”:
“Pothole, in geology, cylindrical pit formed in the rocky channel of a turbulent stream. It is formed and enlarged by the abrading action of pebbles and cobbles that are carried by eddies, or circular water currents that move against the main current of a stream. Potholes are most commonly found at the bottoms of eddies in rivers and in plunge pools below cataracts; sometimes potholes in a rock outcrop indicate the former site of a rapid or cataract. Potholes are often found in formerly glaciated regions where whirling columns of glacial meltwater sank well-like holes, or moulins, through the ice.
Please walk carefully in this area; the rocks can be slippery when they are wet.
Please answer the following questions regarding this Lagoon Pothole Earthcache:
1) What event most likely happened that contributed to the formation of this pothole?
2) What is your estimated age of this pothole?
3) What is the average depth of the pothole? There are two spots you can measure for the depth - both are different depths.
4) What if the average width of the pothole?
5) You will see an interesting object at the bottom of the Pothole. What is it and how do think it get to this location?
6) Can you see any other potholes in the immediate area?
7) To claim the earthcache - Take a picture of yourself with the pothole in the background
I hope you enjoyed this Earthcache. Be sure to visit "Marathon Potholes Earthcache - GC774K9" down Carden Cove Road