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This is a wide angle view of the cave at Cave-in-Rock State Park along the Ohio River in Southern Illinois.
Photographed using a Nikkor 15mm f/5.6 lens on a Sony A7R.
A somewhat surreal image, but this boat is on an underground pool in the caves at Wookey Hole, Somerset. The artifical lighting in the cave has produced the vivid colours.
Minnetonka Cave is the largest limestone rock cave in the state of Idaho. It is located in Cache National Forest in Bear Lake County, Idaho, United States, above the village of St. Charles (located at the north end of Bear Lake).
A short limstone cave I found while following a small stream up the hill near my bach here at Rapahoe. Further upstream I found a larger cave which I will return to photograph later.
This photo flowstone in the cave at Lewis and Clark Caverns State Park was taken without flash. I am always surprised how well the Canon Mark IV does in really low light. The image has noise but turned out better than I expected.
Though they bear their name, Lewis and Clark never saw the caves, however, they did passed trough the canyon where the caves are located. On July 31, 1805 they camped within a mile of the caverns. From oral histories we know that several of the native tribes knew of their existence. Given the right weather condition steam arose from natural cave entrances.
In 1882, after hearing stories from Native Americans of great caves, two men, Charles Brooke and Mexican John, from Whitehall Montana decided to explore the area looking for caves. They found the entrance but neither shared the exact location. The caves were rediscovered in 1892 by two local hunters, Tom Williams and Burt Pannell. The hole they found was too deep to enter so Williams returned in 1898 with ropes, candles, and six other men. They lowered themselves in to “Discovery Hole”. Williams later built rope ladders and led parties into the cave on candle lii tours.
In 1902 Williams convinced local investor, Dan Morrison, to develop the caverns for tours. The problem was the cave was on land granted to the railroad. A law suit followed, and Morrison lost but the cave became know as Morrisons Cave. The railroad gave the property to the Federal Government.
On May 11 1908, President Theodore Roosevelt proclaimed the area around the caverns entrance as Lewis and Clark National Monument. He named it in honor of the two early explorers. The monument was enlarged by President Taft in 1911. After becoming a National Monument, the caverns was operated on an erratic basis under the control of the Superintendent of Yellowstone National Park, and in 1917 under the control of the newly formed National Park Service. Technically, after 1917, the caverns were closed, with only a custodian and Mr. Morrison holding keys to the locked cave until 1936 when the area surrounding the caverns became a state park. The park has been known as both Morrison Caverns State Park and Lewis and Caverns State Park with the State of Montana finally decided on the later.
Much of the park as we see it today is due in large part to the efforts of the Civilian Conservation Core during Great Depression of the 1930s. From the summer of 1935 until the summer of 1941 there were 175 to 200 young men working in or around the cave. Many improvements were added during this period, including 3.2 miles of scenic highway through Greer Gulch to the parking area, a refurbished picnic area, the stone Headquarters House, and extensive development work inside the cavern. Today the Lewis and Clarks Caverns is a National Historic District listed on the National Register of Historic Places.
Geologically the growth of a limestone cave requires more than soluble rock and acidic water. In addition, the permeability of the limestone must be concentrated along joints, faults, or bedding planes to facilitate water flow. Sufficient topographic relief must be present from surface stream entrenchment that water will flow quickly through the subsurface.
Lewis and Clark Caverns formed in units of the Mississippian Madison Limestone. The caverns are localized at the base of a unit of the Madison called the Mission Canyon Limestone, There the groundwater flow was perched above the a less-soluble and less permeable unit called the Lodgepole Limestone which caused flow and dissolution to be concentrated along the boundary of the two units. A small Laramide (a period of mountain building in western North America between 75 to 40 million years ago) anticline provided fractures in the rock, opening up bedding plane faults and axial plane joints. Dissoultion of the cave began within the past four million years, when the Jefferson River cut a 1500 foot deep canyon through the anticline.
This is a bay on the south side of Cyprus on a very windy day in summer
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I am Darkday's photographer but sometimes I get to be her photography subject. Here I am in the rock section of the amazing storm drain called Aqua Cave having a little cave adventure