River Sink Spring
River Sink Spring is a small opening of an underwater cave – a karst window.
Map of the site
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Woodwille Karst Plain
There are quite many interesting geological features in the Woodwille Karst Plain – a karst area at Tallahassee, such as the giant Wakulla Cave System, the longest known underwater cave in USA (72,171 m).
Characteristic features in such karst plans are also karst windows – openings in the ground, where the ceiling of a cave has collapsed and a fragment of the cave is seen from above. In Woodwille Karst Plan such karst windows are flooded – these are small lakes with a spring in one end and sink – in another end of the lake.
Description of River Sink Spring
River Sink Spring is one of the most prominent karst windows in Woodwille Karst Plain, similar to a nearby Kini Spring. Frequently both are mentioned as 1st magnitude springs, although here the term “spring” is somewhat controversial: the water appears for a short distance and then disappears again. The measured flow of water in it is 4 644 l/s – indeed a giant flow!
This karst window is some 90 by 30 m large. At the spring vent (northern end) this small lake is some 9.1 m deep. The southern end is slightly deeper – 9.5 and there is the sink, where the water leaves the small lake. The debris that falls into the lake, collects there.
The area was turned into a plantation of Pinus taeda (loblolly pine) earlier and, currently, there is ongoing restoration of a natural habitat in this area to allow the return of the local longleaf pine and other species.
The small spring lake is a popular swimming place.
- Leon Sinks – Upper River Sink, CaveAtlas.com. Accessed on September 13, 2023.
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