Vnaz50 Posted December 30, 2020 Share Posted December 30, 2020 San Antonio, Tx I just pulled up this piece, which at first I thought maybe it was a mud crack. Its stinks like sea water, hardened on the outside and sounds like porcelain when you tap it. Then below it, the material is very sensitive. Which makes sense to me. Why would it sound like glass? Link to comment Share on other sites More sharing options...
Phevo Posted December 30, 2020 Share Posted December 30, 2020 It could contain a lot of the mineral silica (which glass is also made of), but I don't know that area maybe someone else will be able to say more confidently 2 Link to comment Share on other sites More sharing options...
Rockwood Posted December 30, 2020 Share Posted December 30, 2020 41 minutes ago, Vnaz50 said: sounds like porcelain when you tap it. Music to a quarry collector. The slabs from most quarries make their own musical notes. 3 Link to comment Share on other sites More sharing options...
Vnaz50 Posted December 30, 2020 Author Share Posted December 30, 2020 14 minutes ago, Phevo said: It could contain a lot of the mineral silica (which glass is also made of), but I don't know that area maybe someone else will be able to say more confidently Thank you. It runs the entire width of my backyard, where it begins to slope down. That’s the only area I’ve found it. Link to comment Share on other sites More sharing options...
JohnJ Posted December 30, 2020 Share Posted December 30, 2020 Using this LINK, what formation is exposed at your place? 1 The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
Vnaz50 Posted December 31, 2020 Author Share Posted December 31, 2020 7 hours ago, JohnJ said: Using this LINK, what formation is exposed at your place? I'm down the road from the Hills and Dales pitcave. Which was Ked & Kgru if I saw that correctly. Link to comment Share on other sites More sharing options...
JohnJ Posted December 31, 2020 Share Posted December 31, 2020 2 hours ago, Vnaz50 said: I'm down the road from the Hills and Dales pitcave. Which was Ked & Kgru if I saw that correctly. Since you're in one of the karstic regions, you probably are seeing the erosional effects of ground water on the Edwards Limestone and upper Glen Rose Formation (Kgru). The platy rocks you posted above look like fractured chunks of Kgru. Keep in mind that rocks with minerals more resistant to erosion and dissolution (like dolomite) will be hard enough to sound similar to porcelain. 2 The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
grandpa Posted January 2, 2021 Share Posted January 2, 2021 @Vnaz50, I've noticed that you continue to pull up karst limestone from your backyard and ask the forum if there are fossils in it. You clearly show a lot of passion for paleontology and have a strong interest in learning more about it and how it relates to what you are finding and learning more about the paleontology of the area. From my perspective, I've already given you the best and easiest path to the knowledge you seek . . . Join the Paleo Society of Austin. You will be welcomed there and will learn much and learn it quickly. Please consider my advise. I didn't just grow this old without learning something along the way. 4 1 Link to comment Share on other sites More sharing options...
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