there are pure Floreana tortoises living on other islands in the archipelago. Geology Isla Floreana is a shield volcano, which has erupted alkaline basalts since 1.5 Ma. It is the southernmost island in the Galapagos Archipelago, and a 3,400 m submarine escarpment 10 km south of the island forms the southern boundary of the Galapagos Platform. There are over 50 scoria cones onshore and 6 tuff cones offshore. Mostly composed of tephra, these cones are the origin of the A'a lava flows. The oldest flows are on the northern end of the island, while the youngest (26 ka) are on the southern end. Cerro Pajas, the tallest inactive volcano on the island, is the origin of the largest lava flow (272 ka). Important Bird Area The island has been recognised as an Important Bird Area (IBA) by BirdLife International. It supports one of the main colonies of critically endangered Galápagos petrels in the archipelago, with about 350 nests scattered beneath a dense vegetation among the rocks. Medium tree finches are endemic to the island. Other significant species include lava gulls and Galapagos penguins. Points of interest A favorite dive and snorkeling site, “Devil's Crown”, located off the northeast point of the island, is an underwater volcanic cone, offering the opportunity to snorkel with schools of fish, sea turtles, sharks and sea lions, which are abundant amongst the many coral formations found here. At Punta Cormorant, there is a green olivine beach to see sea lions and a short walk past a lagoon to see flamingos, rays, sea turtles, and Grapsus grapsus (Sally Lightfoot) crabs. Pink flamingos and green sea turtles nest from December to May on this island. The "joint footed" petrel is found here, a nocturnal sea bird which spends most of its life away from land. Post Office Bay provides visitors the opportunity to send post cards home without a stamp via the over 200-year-old post barrel and other travelers. A miniature football (soccer) field, complete with goals, at the end of Post Office Bay, is used by tour boat crews and their tourists. Gallery Bibliography Egnal, George (2013). Frederick Ritter My Evil Paradise Floreana (Amazon Kindle Ebook) Sinep, Peter (2013). The Queen of Floreana (Amazon Kindle Ebook) References External links Floreana Islands of the Galápagos Islands Important Bird Areas of the Galápagos Islands Seabird colonies Penguin colonies Island restoration