dillonf
fully equipped rock polisher
Hounding and tumbling
Member since February 2022
Posts: 1,577
|
Post by dillonf on Apr 17, 2022 7:45:46 GMT -5
My wife and daughter found this in a small creek at a local park. It is a tributary to the Colorado river here in Central Texas (East of Austin). We find lots of chert and shell fossils in the creeks in this area. Details: can be scratched by a pocket knife, doesn't react to acid, doesn't react to a flame, color - has a slight pinkish tinge that may not be discernible in the photos, not magnetic Rock has pores but sinks in water. My first intuition was that it was some old concrete, but doesn't seem like it is concrete . . . though I could be wrong. We are wondering if the tube-like structures could be some form of fossils? We haven't broken it yet. Link to pictures of all sides. Strange RockAny ideas/thoughts are appreciated! Cheers, Dillon
|
|
|
Post by RickB on Apr 17, 2022 8:16:32 GMT -5
Looks to me like trace fossils of infilled burrows from some worm/etc. Edit: Don't break it, leave it as is. One of your photos: Try clicking on this photo and it will take you to "PostImages" which is the photo posting site that I use. From there, it is not hard to figure out and you don't need an account to use it. dillonf
|
|
Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,455
|
Post by Sabre52 on Apr 17, 2022 8:50:23 GMT -5
Yep, we see similar trace fossils in the limestone down by our creek.
|
|
victor1941
fully equipped rock polisher
Member since November 2011
Posts: 1,975
|
Post by victor1941 on Apr 19, 2022 14:13:32 GMT -5
Dillonf, if you visit Costco in north central Austin the cut limestone retaining wall blocks show a lot of structure and fossils similar to what you are finding. The one that is hard to find is the starfish samples in the Texas Natural History Museum.
|
|
electrocutus
spending too much on rocks
Member since October 2020
Posts: 331
|
Post by electrocutus on Apr 19, 2022 15:23:47 GMT -5
Dillonf, if you visit Costco in north central Austin the cut limestone retaining wall blocks show a lot of structure and fossils similar to what you are finding. The one that is hard to find is the starfish samples in the Texas Natural History Museum. Are you suggesting we take "samples" of the retaining wall at Costco? :-) ;-)
|
|
|
Post by rmf on Apr 19, 2022 18:37:27 GMT -5
dillonf My first guess is that it is from the Cretaceous. A quick look at a geologic map shows Austin is in the Cretaceous. I hunt the Cretaceous but not in TX. There is much that looks like worm boring. However it could be the bottom side of a crab carapace. Third possibility is it could be poo. Some of the fossils from the Cretaceous have a high calcium content from all the shells
|
|
victor1941
fully equipped rock polisher
Member since November 2011
Posts: 1,975
|
Post by victor1941 on Apr 19, 2022 20:49:18 GMT -5
I will let my iPhone take all the samples.
|
|
dillonf
fully equipped rock polisher
Hounding and tumbling
Member since February 2022
Posts: 1,577
|
Post by dillonf on Apr 20, 2022 20:39:50 GMT -5
victor1941 Thanks!, I will definitely go to Costco and take samples! I'll probably grab some gas while I'm there. Checking out fossils in the rock wall will be fun! rmf Poo fossil! love it. My 4 year old will love the idea of a poo fossil!
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Apr 27, 2022 16:43:53 GMT -5
Clicking on the link to all 4 pictures, the third one your holding sideways looks like a creepy bunny!
|
|