File:The Remaining Natural Hot Springs of Hot Springs National Park, Arkansas.jpg
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DescriptionThe Remaining Natural Hot Springs of Hot Springs National Park, Arkansas.jpg |
The thermal springs of Hot Springs National Park are situated in the Ouachita Mountains of outer Arkansas. The springs emerge in a gap between Hot Springs Mountain and West Mountain in an area about 1,500 feet (460 m) long by 400 feet (120 m) wide at altitudes from 576 to 683 feet (208 m). The springs predominantly are composed of hot water from thousands of feet underground mixed with some shallow cold ground water. Currently, there are 43 thermal springs in the park that are presumed to be flowing. Thermal water from 33 of the thermal springs is collected and monitored at a central reservoir, which distributes the combined discharge for public use and consumption. Rock types in the area include shale units which generally impede ground-water movement, while fractured chert, novaculite, and sandstone units generally support ground-water movement. The water comes from rain which falls in mountains to the north and northeast. Flowing downward through cracked rock at about one foot a year, the meteoric water migrates to estimated minimum depths of 4,500 to 7,500 ft (2,300 m) and achieves high temperatures in the deep section of the flow path before rising along fault and fracture conduits. Under artesian pressure, the thermal waters rise and emerge through the Hot Springs Sandstone between the traces of two thrust faults, along several northeast-trending lineaments. Some rainwater from near the springs mixes with the deep hot water before discharge. The trip down takes about 4,000 years while the hot water takes about a year to reach the surface. The heat comes from the natural heating of rocks as depth increases. The composition of the water indicates it is heated rainwater which has not approached a magmatic source, so no volcanic action is involved in the formation of these hot springs. The result is the mildly alkaline, pleasant tasting solution with dissolved calcium carbonate. The exposed rock types in the vicinity of the thermal springs are sedimentary rocks of Mississippian to Ordovician age, with the exception of younger igneous rocks (Cretaceous age) exposed in two small areas about 6 and 11 miles (18 km) southeast of the thermal springs (Potash Sulphur Spring and Magnet Cove, respectively), and in many very small dikes and sills. Most dikes are less than 5 ft (1.5 m) wide. There have been 80 dikes noted about 4 miles (6.4 km) southeast of Hot Springs, on and near the Ouachita River. There is no indication that igneous rock occurs where the thermal springs discharge. en.wikipedia.org/wiki/Hot_Springs_National_Park |
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The Remaining Natural Hot Springs of Hot Springs National Park, Arkansas
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Author | Ken Lund from Las Vegas, Nevada, USA |
Camera location | 34° 30′ 57.7″ N, 93° 03′ 08.94″ W | View this and other nearby images on: OpenStreetMap | 34.516029; -93.052482 |
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This image, originally posted to Flickr, was reviewed on January 2, 2012 by the administrator or reviewer File Upload Bot (Magnus Manske), who confirmed that it was available on Flickr under the stated license on that date. |
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current | 09:51, 2 January 2012 | 1,280 × 960 (373 KB) | File Upload Bot (Magnus Manske) (talk | contribs) | {{Information |Description=The thermal springs of Hot Springs National Park are situated in the Ouachita Mountains of outer Arkansas. The springs emerge in a gap between Hot Springs Mountain and West Mountain in an area about 1,500 feet (460 m) long by 40 |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot A70 |
Exposure time | 1/160 sec (0.00625) |
F-number | f/2.8 |
Date and time of data generation | 20:42, 18 March 2004 |
Lens focal length | 5.4 mm |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | picnik.com |
File change date and time | 20:42, 18 March 2004 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 20:42, 18 March 2004 |
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APEX aperture | 2.9708536585366 |
APEX exposure bias | 0 |
Maximum land aperture | 2.9708536585366 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 9,846.1538461538 |
Focal plane Y resolution | 9,846.1538461538 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |