Malpelo Island

Malpelo Island is a remote oceanic island located in the eastern Pacific Ocean.

It sits far to the west of the Colombian mainland. The island consists of a steep and barren rock formation. It features three high peaks, with the highest being the Cerro de la Mona. Malpelo is the only part of the Malpelo Ridge that rises above the ocean surface. This ridge is a solitary volcanic submarine ridge. It extends in a northeast-southwest direction. The island is surrounded by deep water and several offshore rocks.

The map shows how the island sits within its maritime environment.

The geology of Malpelo is the result of complex tectonic processes. The island is composed of Miocene pillow lavas and volcanic breccias. It also contains basaltic dikes, which are vertical sheets of rock. These geological features date back to between 16 and 17 million years ago. The island and the Malpelo Ridge formed during the Late Miocene. This happened due to a complex interaction in the Earth. Specifically, the Cocos-Nazca Spreading Centre interacted with the Galápagos hotspot. Because it is an oceanic island, it was never connected to a mainland. It has always remained isolated from other landmasses.

While the island looks like a bare rock, it supports a unique ecosystem. Most of the surface is very steep and lacks thick soil. However, deposits of bird guano provide essential nutrients. Guano is the waste produced by birds. This organic matter allows algae, lichens, and mosses to grow. Some small shrubs and ferns have also established themselves. The island is home to three specific species of lizards. These include Agassiz's anole, the Dotted galliwasp, and the Colombian leaf-toed gecko. A unique land crab, Johngarthia malpilensis, also lives there. This species was first described by scientists in 1893.

Malpelo is also a vital location for many bird species. It is recognized as an Important Bird Area by BirdLife International. The island supports massive breeding populations of Nazca boobies. Estimates from 2007 suggest there are between 60,000 and 110,000 of these birds. The presence of these large colonies helps maintain the nutrient cycle on the island. This cycle is driven by the guano mentioned earlier. Without the birds, the small amount of plant life might not survive. The birds and the plants are closely linked in this harsh environment.

The waters surrounding the island are famous for their marine life. Malpelo is a very popular location for shark-diving expeditions. Divers frequently observe swarms of 500 hammerhead sharks. They also see hundreds of silky sharks in the area. It is one of the few places where the smalltooth sand tiger shark is seen alive. This often happens at a dive site called "El bajo del Monstruo." Other fish species in these waters include Sailfish, Marlin, and Dorado. The area also hosts Albacore, Tollo Sharks, and Hammerhead Sharks.

The history of Malpelo involves many different nations. It was likely isolated from human contact before European discovery. It may have been one of the first remote Pacific islands found by Europeans. Peruvian maps from 1530 show the island. Following its discovery, Spain took possession of the territory. Later, the island was annexed by Peru. Eventually, it became part of Colombia. Many people have visited over the centuries. James Colnett visited in 1793, and an English vessel named the Cinque Ports wrecked there in 1704.

Today, Malpelo is a heavily protected marine environment. It is part of the Malpelo Fauna and Flora Sanctuary. This sanctuary is a protected area for plants and animals. The island is also surrounded by a massive no-fishing zone. This zone measures over 850,000 hectares. In 2006, UNESCO declared Malpelo a natural World Heritage Site. This status was granted because of its importance as a shark reserve. The Colombian government uses its Armed Forces to defend a military post there. Protecting this biodiversity remains a major priority for organizations like the Fundación Malpelo y Otros Ecosistemas Marinos.