Do you smell that? EarthCache
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Tanyard Creek is a 6.6-mile-long stream that flows from Lake Windsor to Little Sugar Creek in Bella Vista. A loop trail was built by the Bella Vista Property Owners' Association incorporating Tanyard Creek and the waterfall created by the overflow of Lake Windsor. The trail is open to the public and is a destination for adults, kids and dogs (which must be on a leash) to go to play in the waters below the falls.
Bicycles are not allowed on Tanyard Creek Trails
When the flow of Tanyard Creek has slowed down, you will be able to see an upstream spring at this location.
You will also notice an odor which smells a lot like rotten eggs. It is caused by a gas given off from the spring because the water has passed through the dark sulpher bearing Chatanooga shale lying below the "St. Joe" Formation.
The St. Joe Limestone is a fine-grained, crinoidal limestone that may occasionally contain some smoothly bedded chert. Some beds may display a coarse bioclastic texture. The limestones (and cherts) are frequently gray, but may also be red, pink, purple, brown, or amber.
The fossil clasts are generally white in contrast to the matrix. Some thin calcareous shales are found in the sequence (top, lower middle, and base).
The base of the St. Joe Limestone is generally marked by a phosphatic, greenish shale or conglomerate & is frequently responsible for the formation of many bluffs in this region.
A formation rank has been suggested by some workers for the St. Joe Member of the Boone Formation. Crinoids, brachiopods, bryozoa, conodonts, blastoids, ostracods, and rugose coral have been noted in the unit. The basal contact is considered disconformable in most places, but some workers suggest a conformable lower contact with the Chattanooga Shale.
The St. Joe Limestone ranges from a feather edge to over 110 feet in thickness.
To claim this EarthCache you must answer the following question:
The plaque is missing due to recent high water.
For the time being, a best guess will be accepted.
Once you email your answer, please log your find.
What is the name of the gas that you can smell when the flow of the creek has slowed down?
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My address is Mr.GeoZee@Gmail.com
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~ As with any EarthCache the point is for you the cacher to learn something new about the area. ~
This EarthCache was developed by a member of
The NorthWest Arkansas Cachers
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