sharko69 Posted September 12, 2014 Share Posted September 12, 2014 Hit a couple of spots yesterday and today trying to find some echinoids. Last night I spent an hour back at a road cut in Salado, TX. I had found a couple of fist sized samples the last time I was there and thought I would give it another shot. Walked for 45 minutes and found nothing. It was starting to get dark so I headed back to the car and found this one 15 feet from the front door as I was about to leave. Also found a partial ammonite? Link to comment Share on other sites More sharing options...
sharko69 Posted September 12, 2014 Author Share Posted September 12, 2014 (edited) This evening was in Georgetown TX and found these two. Edited September 12, 2014 by sharko69 Link to comment Share on other sites More sharing options...
Rustdee Posted September 12, 2014 Share Posted September 12, 2014 Mighty nice looking fossils! Do you know what formation these are from? Link to comment Share on other sites More sharing options...
JohnJ Posted September 12, 2014 Share Posted September 12, 2014 Hit a couple of spots yesterday and today trying to find some echinoids. Last night I spent an hour back at a road cut in Salado, TX. I had found a couple of fist sized samples the last time I was there and thought I would give it another shot. Walked for 45 minutes and found nothing. It was starting to get dark so I headed back to the car and found this one 15 feet from the front door as I was about to leave. Also found a partial ammonite? The large 'fat' urchin is a Macraster species...most likely M. obesus. The "ammonite" is the internal cast of a nautiloid, as evidenced by the long "s" like sutures. The general area of that location is the Georgetown Formation. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
RyanNREMTP Posted September 12, 2014 Share Posted September 12, 2014 Very nice finds. Congrats. Link to comment Share on other sites More sharing options...
JohnJ Posted September 12, 2014 Share Posted September 12, 2014 This evening I went under the I-35 bridge in Georgetown where the SanGabriel river runs under and found these two. The first photo is an internal cast of a regular echinoid...maybe a Coenholectypus. The irregular "heart" urchin is probably a Heteraster species. Both are common in the Walnut and Comanche Peak formation in the area. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
sharko69 Posted September 12, 2014 Author Share Posted September 12, 2014 Thank you so much for the information. So Georgetown formation in Salado? How common is M. Obesus? What are the barnacle looking concretions on the outside? Thanks again. Link to comment Share on other sites More sharing options...
JohnJ Posted September 12, 2014 Share Posted September 12, 2014 Thank you so much for the information. So Georgetown formation in Salado? How common is M. Obesus? What are the barnacle looking concretions on the outside? Thanks again. Georgetown Formation is part of the Washita Group - mapped as Kgt on the geologic map. The M. obesus can be locally common, but always impressive. Apparently, their tests were solid enough for many oysters and tube worms to use as "home base". The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
sharko69 Posted September 12, 2014 Author Share Posted September 12, 2014 I really appreciate the information. Echinoids are new to me. I happened upon them by chance since I travel to Austin every couple of weeks and now I am on the hunt. Thank you for the information and the link to the map. Link to comment Share on other sites More sharing options...
bone2stone Posted September 13, 2014 Share Posted September 13, 2014 JohnJ knows his echie stuff. Bingo, on the nose on all counts!! Hard to find the obesus without the extra attached ostrea. Congrats on that Obesus......great find! Jess B. Link to comment Share on other sites More sharing options...
sharko69 Posted September 13, 2014 Author Share Posted September 13, 2014 Thanks. He sure does and I always appreciate everyone's knowledge on this forum. It is amazing. That is the third obesus I have found in this location. Funny thing is I have walked the entire area and both times found all of them within 10 feet of where I parked. Link to comment Share on other sites More sharing options...
bone2stone Posted September 15, 2014 Share Posted September 15, 2014 I have found one Obesus in my lifetime and that was when I35 was under re-construction. Jess B. Link to comment Share on other sites More sharing options...
erose Posted September 15, 2014 Share Posted September 15, 2014 I have found one Obesus in my lifetime and that was when I35 was under re-construction. Jess B. When isn't it? Link to comment Share on other sites More sharing options...
bone2stone Posted September 16, 2014 Share Posted September 16, 2014 When isn't it? When it was new. I found mine ~40 years ago. Jess B. Link to comment Share on other sites More sharing options...
sharko69 Posted September 16, 2014 Author Share Posted September 16, 2014 It will be a nice road when they finish it. Doubt I will be around to see it. Until then, thanks Txdot for exposing some fun stuff. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now