During Late Oligocene time, marine waters transgressed the coastal plain of southern United States and coral reefs grew on topographically high features. In Texas and Louisiana, where salt dome mounds were commonly covered by coral growth, a large reef formed over three neighboring salt domes: Nash, Boling, and Damon Mound. A caprock limestone quarry on the flank of Damon Mound exposes a well-preserved fault block of Heterosteqina Zone, Anahuac Formation, coralline limestone. The outcrop consists of a complete shallowing-upward cycle of a coral reef and exhibits a great variety of fossils and lithofacies. Two-inch cores were taken to ascertain...