Eagle Point Cave EarthCache
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Eagle Point Cave is located on Mackinac Island, MI in Lake Huron.
The cave is accessible by road or trail. Island maps can be
downloaded or printed here:
http://www.mackinacisland.org/pdfs/mackinacislandlocatormap.pdf
Eagle Point Cave is what is known as a Sea cave or littoral cave.
The cave sits about 116 feet above the current level of Lake Huron.
Thousands of years ago this lake was not named Huron but instead
Algonquin and its water levels were much higher.
It was during this period that this cave was formed from the
eroding action of waves as they lapped against what was once the
island’s shoreline. This repeated wave action forced both air
and other abrasive materials into the opening, eventually creating
a larger opening.
This repetition over time washed away softer materials, leaving
behind the harder material known as Mackinac Breccia. This process
created what you will see today as an amphitheatre style opening.
You will find that all of the caves on this island share this
similar style opening, as well as a very limited depth. If you
follow the trail west past the opening, amongst the dirt and tree
roots you will notice evidence of old stairs carved into the stone,
an indication that something more developed once existed here.
Unfortunately, it is difficult to find any hard evidence, written
or photographic, indicating what else other than the cave once
stood here.
The cave itself has obviously been able to withstand the test of
time. Please keep this in mind when visiting this area. Preserve it
for the next person. In fact, if you find any garbage please pack
it out with you and leave the area better than you found it.
Requirements to Log To receive credit for this Earthcache please
send me the following answers:
#1 Report the cave’s opening height. This can be done with a
tape measure or easily estimated.
#2 Report the cave’s depth. This can be done with a tape
measure or easily estimated.
#3 What is the approximate elevation reading while standing in
front of the cave?
#4 If you have a camera take a picture of yourself at the site
(optional) and post it with your log.
Cache Placed by an:
Additional Hints
(No hints available.)