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Rimstone/Travertine

 
 
Reply Sun 7 Feb, 2016 04:26 pm
Okay, so to make a long question sorta short, basically i love the mineral formation rimstone/gours. These are the kind you find in caves from the small cluster of them to the big pools. You can see the same design at Yellowstone National Park, Mammoth Hot Springs. I assume they are related? I understand in caves the crust forms around the water, but how is this so when in some places the water is moving over the formations pretty fast, in caves, and in mammoth hot springs.Also why is the rimstone found inside caves more "stronger" than that found at hot springs. Why does rimstone type formations not occur around a cold spring that is loaded with the needed minerals to build it. I have one time seen a type of spring called a chalybeate spring. It flowed from the side of a canyon wall, as it flowed down it went over and outcrop of rocks and made the water sorta "drip". under the large rock where the water was dripping was a beautiful stalactite, and stalagmite, with little gours all around the bottom of it. It looked like it was extremely fragile, but it was a scene that looked so much like a cave, but only above ground and very fragile.
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Type: Question • Score: 4 • Views: 962 • Replies: 4
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farmerman
 
  2  
Reply Sun 7 Feb, 2016 08:08 pm
@natet2012,
It has to do with porosity of the calcitic travertine. Sometimes inthe hot springs we see an equilibria of silicious 'acid' along with the carbonate solutions so when it sets up nd crystallizes, the crystals are larger nd more porouS, and, less dense. Usually makes em chemically and physically weaker and more prone to erosion.
Trvertine "flowstones" along the bases of the gara will often be much denser and therefore more useful to artsy craftsy uses like counter tops or tiles.
Chalybeate springs are mostly iron carbonates. Even though the word refers to a greek foundryman, the mineral chalybite ( aform of siderite) is one of the principle chemical components.

You a caver?

Ever do Lechuguilla?? You can see a totally different flowstone makeup there. TheArchea and reducing thermal sulfitic springsi hve reduced gypsum deposits leaving hydromagnesite and Sulfur . But its gorgeous.
One of my partners was in there as part of a mapping expedition (I wasnt). Only caving Ive done was in W Va and in Apatite /coquina complexes in florida and that was years ago.
farmerman
 
  1  
Reply Sun 7 Feb, 2016 08:21 pm
@farmerman,
https://www.google.com/imgres?imgurl=https://upload.wikimedia.org/wikipedia/commons/2/29/Cristales_cueva_de_Naica.JPG&imgrefurl=https://en.wikipedia.org/wiki/Cave_of_the_Crystals&h=3456&w=5184&tbnid=788qfcYfxl7E8M:&tbnh=133&tbnw=200&docid=Y1AA1TRvdcsjIM&itg=1&usg=__4Bq6NvtLiShGQF9nXyC5n_a0
NMI=
A little different cristales, check out the littlle guy in the loqer foreground. ome scale
dalehileman
 
  1  
Reply Mon 8 Feb, 2016 11:40 am
@farmerman,
Man thank you, I had forgot what travertine looks like
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natet2012
 
  1  
Reply Mon 8 Feb, 2016 06:19 pm
@farmerman,
So basically you are saying the first picture i have is the same thing as say mammoth hot springs formations , only missing the silicious acid ring? The acid present in the solution makes it in turn sorta "weaker" than the cave version of it. I have a friend that lives in Colorado and he is sending me a specimen he got from his hot spring. I believe he said it came apart from the actually mound itself, so it has the little gours in it, very much like the second picture i have, when i place it in my glass display, i am not exactly sure what to place on the label.. I have seen the formation called many things. Which is proper.
As far as caving goes, i do enjoy going into caves, but not a full timer or anything like that, I usually try to get into one a few times a year, looking for one for this year. Thanks for the answers. Smile

http://commondatastorage.googleapis.com/static.panoramio.com/photos/original/55325873.jpg

http://c8.alamy.com/comp/DDP3EK/travertine-terrace-details-at-orange-mound-spring-mammoth-hot-springs-DDP3EK.jpg
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