Everglades Pseudoatoll
The Everglades Pseudoatoll (also called a pseudo-atoll) was a major geomorphic feature of southern Florida during the Pliocene epoch. == Origin == The Everglades Pseudoatoll began its growth during the early Eocene as a paleodepression possibly created by an asteroid impact upon the carbonate Florida Platform at the southern part of what is now Everglades National Park.