Bioherm covered in cactus. This microbial buildup located in central Texas was once under water. During the Cambrian era, around 500 million years ago, the central portion of the continent was covered in a shallow sea. #microbialreef #ancientreef #bioherm #cambrian #underthesea #cactus #coveredincactus #bluesky #centraltexas #hillcountry #masontexas #geology #geologyrocks #geologyfieldtrip #hiking #hiketexas #ramostfamous https://www.instagram.com/p/BtEGzAJB2rB/?utm_source=ig_tumblr_share&igshid=7ulhks4d59nu



















