Rumney in Grafton County, New Hampshire — The American Northeast (New England)
Geological History of the Polar Caves
During the Paleozoic Era warm climates caused glacial melting covering most of the planet with water. Pressures forced great quantities of magma to erupt from the depths of the Earth creating land masses and huge mountains. Over the next 150 million years, weathering and erosion removed thousands of feet of overlaying sediments exposing much of the granite roots of these White Mountains.
In the last million years several glaciers have crept southward from the Arctic further eroding and fracturing the landscape. Fifty thousand years ago the last of these enormous ice sheets rose to a height of more than a mile as it passed over the mountains above you. The force of this ice loosened and deposited granite boulders from the east side of Mt. Haycock forming the prominent cliff above. The top of this peak, being badly fractured when the glacier receeded, cracked and loosened adding to the boulder deposit at its base.
Thus fourteen to twenty thousand years ago, this random deposit of boulders formed the passages of what today we call The Polar Caves.
Erected by Polar Caves Park.
Location. 43° 46.832′ N, 71° 46.993′ W. Marker is in Rumney, New Hampshire, in Grafton County. Marker can be reached from Mount Moosilauke Highway (New Hampshire Route 25). Click for map. Marker is in Polar Caves Park; admission fee required. Marker is at or near this postal address: 705 New Hampshire 25, Rumney NH 03266, United States of America.
Other nearby markers. At least 8 other markers are within 6 miles of this marker, measured as the crow flies. Park History (a few steps from this marker); The Granite State (within shouting distance of this marker); Smith Bridge (approx. 2.2 miles away); Baker River (approx. 4 miles away); The Common (approx. 5 miles away); Stream Gaging in New Hampshire (approx. 5.1 miles away); Rotary Amphitheater (approx. 5.1 miles away); Samuel Livermore (approx. 5.8 miles away). Click for a list of all markers in Rumney.
Also see . . . Polar Caves Park. (Submitted on August 27, 2016, by Anton Schwarzmueller of Wilson, New York.)
Categories. • Natural Features •
Credits. This page originally submitted on , by Anton Schwarzmueller of Wilson, New York. This page has been viewed 201 times since then and 14 times this year. Photos: 1, 2, 3. submitted on , by Anton Schwarzmueller of Wilson, New York. This page was last revised on August 28, 2016.