Hole in the Wall EarthCache
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The earthcache is located in Deer Island Campground. The feature can be seen from the ferry or explored up close by walking along the beach.
During the Lower Devonian Period, approximately 400 million years ago, the accumulation of lava flows and beds of volcanic ash formed small volcanic islands in an ancient sea. The flows and ash beds formed the rock that is under the campground. This was during the mountain building (called the Acadian event by geologists) – major deformation of the Earth's crust caused by collision of the micro continent of Avalon with early North America caused this assembly of the varied terrain of western and coastal New Brunswick. Many significant faults develop during this period as well as many smaller ones. The island is coated with sediments (glacial till) forming a small beach just to the west of the posted coordinates. When faulting or other earth movements occur, rocks often respond by breaking or pulling apart along parallel planes of weakness called joints. Joints are the flat plane surfaces and straight line cracks. Abundant joints with different orientations produced the rugged cliffs and blocky nature of the rock in this area. The effects of weathering and erosion can be easily seen on formation. The relentless pounding of the sea and the seasonal alternate freezing and thawing of water, penetrating the cracks and joint surfaces, have sculpted the rock into jagged faces that you now see. The Hole in the Wall is a product of all of these types of weathering. At the posted coordinates you will find a small sea arch and sea cave that were formed together.
To find this earthcache you will have to walk along the shore to the end of the island. Do not go o the location over land. The area has been closed to protect the feature. So when going to this earthcache make sure to stay along the beach and not simply follow the GPS. The posted coordinates will bring you to the front of the hole and cave. Remember this is an earthcache, so there is no container - just an earth science lesson at a beautiful natural feature. To log this cache, you must post a photo of yourself or your hand with your GPS showing the arch or cave in the background. You should be able to see the ceiling of the cave to better understand how these features have formed. Email me through my profile how you think the cave and arch were formed. Please include the name of the earthcache and the number of people in your group in your email. Please take the time to describe why you find this location special so that others might have the same experience. Keep an eye out toward the open water as you may see either seals or whales.
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Treasures
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