Search the Community
Showing results for tags 'calcium carbonate'.
-
Hello. I found this rock in a creek of the Feather River Canyon in Northern Callifornia. It's an area known for its granite formations and serpentine outcrops. This rock was definatly out of place with nothing similar in the area. It weighs 1.25lb or .57kg. No reaction to vinager. Any ideas on what it is would be appreciated. Thank you!
- 2 replies
-
- calcite
- calcium carbonate
-
(and 2 more)
Tagged with:
-
So myself and a client were digging at our calcium carbonate spot that it is Spring Branch Texas with these being found in Glen Rose Formation (maybe upper im not sure). We are trying to loosen at least couple hundred (lbs or kg) chunk of calcium carbonate. These were found on the edge of the chunk and along side a a large piece of fossilized mollusk with a spiral shell (I will take a picture and upload it). I have pulled a couple hundred kg of calcium carbonate out from the spot but these were deeper down and did not look entirely geological in structure, they are extremely irregular and the crevasses in the calcium in some places go all the way through. Can anyone lend a light on how these ribs and banding formed, or what I am looking at, every other piece I have dug out have all been solid and these are completely set apart. Please let me know if anyone needs more information, or pictures!
- 4 replies
-
- calcium carbonate
- central texas
-
(and 1 more)
Tagged with:
-
Using vinegar/acetic acid to reveal small teeth in chalk
The Amateur Paleontologist posted a topic in Fossil Preparation
Hey everyone, hope you're all doing well! From what I've read, small shark/fish teeth can be occasionally encountered by dissolving samples of chalk/limestone in acid. I read Jeppsson et al's 1999 paper on using buffered acetic acid to extract phosphatic fossils (in my case shark teeth), but the method outlined is not that simple and requires access to certain laboratory equipment I don't really have access to right at the moment... All I have is some cheap white vinegar, and some trays and tins I've got some samples of chalk from the Late Cretaceous of Møns Klint, a fossil site in Denmark with relatively diverse fish and shark fauna. Here's the thing - would it be OK to put the samples of chalk in white vinegar (acetic acid)? If it is, I've just got some questions -- Should I dilute the vinegar? And if so, by how much? How long should I leave the chalk in the vinegar? Any suggestions and ideas would be much appreciated, I'd love to find some little fish and shark teeth. Christian- 5 replies
-
- acid-carbonate reaction
- calcium carbonate
- (and 5 more)
-
I'm a new member, so thanks for accepting me. My family and I have hunted for fossils, arrow heads, and sharks teeth for many years. It has been a way to pass the time on hunting leases and on the beach. It has always been a hobby, we have never worried about identification of any particular piece...until recently. Being retired, I started going through our collection, just for the heck of it. I found this piece that we have always been curious about. It was found in a creek bed on a ranch near Sonora, Texas, in northern Schleicher County. It was found 6-7 years ago, we leased the property for deer hunting for four years. With all that said, I posted pictures of it on a FB group. It has been called a "cone in cone" structure, an unknown type fossil, and a man made fake. The post on FB has been entertaining to say the least. One person responding recommended this group so here I am. I am in the Houston area so I would be willing to take it somewhere for a better look. Thanks in advance for any help you can offer.
- 22 replies
-
- calcium carbonate
- inclusions
-
(and 1 more)
Tagged with: