Tguiri Posted June 25, 2020 Share Posted June 25, 2020 Found in abandoned Longhorn limestone quarry in NE San Antonio, TX. For scale: my thumbnail is 18mm Please help identify. Many thanks! 3 'There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 25, 2020 Share Posted June 25, 2020 @Heteromorph @JohnJ @DPS Ammonite @BobWill Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted June 25, 2020 Share Posted June 25, 2020 Yes, a heteromorph ammonite, I think. Don't know the region, so wait for the locals, but Anisoceras; perhaps? 3 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Heteromorph Posted June 25, 2020 Share Posted June 25, 2020 The first specimen is a spectacular example of the heteromorph ammonite Eubostrychoceras reevesi! The second specimen appears to be a twig of lignite, although from the picture I can not rule out a mineral stain or a root growing through the rock. And the name of the chalk formation in which you found this is the Pecan Gap formation. Great finds! ———— References —— Primary Reference: Young, K. (1963). Upper Cretaceous Ammonites from the Gulf Coast of the United States. University of Texas, Publication 6304, 373 pp. A Comprehensive Guide To The Cretaceous Strata Of The Greater San Antonio Area; How To Read The Rocks On Page 161: FOSSIL COLLECTING REPORT. JUNE 2013 Late Cretaceous chalk in North America 7 Link to comment Share on other sites More sharing options...
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