My extraordinarily gifted fossil finding son found this in the bedrock of Brushy Creek (Williamson County, Tx.) and I can’t figure out what it is.
Apologies for not using a proper scale or for poor picture quality but it is ~2’ in diameter and has well defined concentric rings.
My son would love to show anyone in the Cedar Park area where it is and will offer a free Moonie’s hamburger to anyone who can help solve this mystery.
Any help is greatly appreciated!