|After all these years of seeing these beautiful and interesting formations I finally found out what they are. The form through a process called Liesagang weathering. Here is an excerpt from a geologic report on how they are formed: |
"Through a geologic process called Liesagang weathering, mineralization and precipitation has resulted in the creation of iron oxide tubes. These may exist as a single dark ring or multiple concentric rings..."
Here is a link to the whole article. It covers an area a few miles north of Pogue Creek in Kentucky. www.rrgcc.org/documents/rrg-geology.pdf
|title||hemlock shelter, liesanang weathering, pogue creek state natural area, fentress county, tennessee, manuel beers 1|
|date yyyymmdd hr:mn||2008:03:01 15:28:14|
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Updated: 2018-06-24 23:29:17 gmt