Isabela Island is the largest island of the Galápagos with an area of 4,640 km², and length of 62 
miles (100km) nearly 4 times larger than Santa Cruz, the next largest of the islands. This island was named in honor of Queen Isabella of Spain, who sponsored the voyage of Columbus. By the English, it was named Albemarle after the Duke of Albemarle.
One of the youngest islands, Isabela is located on the western edge of the archipelago near the Galápagos hotspot. At approximately 1 million years old, the island was formed by the merger of 6 shield volcanoes - Alcedo, Cerro Azul, Darwin, Ecuador, Sierra Negra and Wolf. All of
these volcanoes except Ecuador are still active, making it one of the most volcanically active places on earth. Two of the volcanoes, Volcan Ecuador and Volcan Wolf (the island's highest point with an altitude of 5,600 feet or 1,707 meters), lie directly on the equator. The island is primarily noted for its geology, providing excellent examples of a geologic occurrence that created the Galapagos Islands including uplifts at Urvina Bay and the Bolivar Channel, tuff cones at Tagus Cove, and Pulmace on Alcedo and Sierra Negra, one of the 
most active volcanoes in the world.
Isabela is also interesting for its flora and fauna. The young island does not follow the vegetation zones of the other islands. The relatively new lava fields and surrounding soils have not developed the sufficient nutrients required to support the varied life zones found on other islands. Another obvious difference occurs on Volcan Wolf
and Cerro Azul, these volcanoes loft above the cloud cover and are arid on top.
Isabela's rich animal, bird, and marine life is beyond compare. Isabela is home to more wild tortoises than all the other islands. Isabela's large size and notable topography created barriers for the slow moving tortoises; apparently the creatures were unable to cross lava flows and other obstacles, causing several different sub-species of tortoise to develop. Today
tortoises roam free in the calderas of Alcedo, Wolf, Cerro Azul, Darwin and Sierra Negra.
Other noted species include penguins, cormorants, marine iguanas, boobies, pelicans and Sally lightfoot crabs abound. Galapagos Land Iguanas and Darwin Finches, Galápagos Hawks, Galápagos Doves and very interesting lowland vegetation. The west coast of Isabela in the Bolivar Channel is the best place in Galapagos for viewing wha
les and dolphin.
The third-largest human settlement of the archipelago, Puerto Villamil, is located at the south-eastern tip of the island.
miles (100km) nearly 4 times larger than Santa Cruz, the next largest of the islands. This island was named in honor of Queen Isabella of Spain, who sponsored the voyage of Columbus. By the English, it was named Albemarle after the Duke of Albemarle.One of the youngest islands, Isabela is located on the western edge of the archipelago near the Galápagos hotspot. At approximately 1 million years old, the island was formed by the merger of 6 shield volcanoes - Alcedo, Cerro Azul, Darwin, Ecuador, Sierra Negra and Wolf. All of
these volcanoes except Ecuador are still active, making it one of the most volcanically active places on earth. Two of the volcanoes, Volcan Ecuador and Volcan Wolf (the island's highest point with an altitude of 5,600 feet or 1,707 meters), lie directly on the equator. The island is primarily noted for its geology, providing excellent examples of a geologic occurrence that created the Galapagos Islands including uplifts at Urvina Bay and the Bolivar Channel, tuff cones at Tagus Cove, and Pulmace on Alcedo and Sierra Negra, one of the 
most active volcanoes in the world.Isabela is also interesting for its flora and fauna. The young island does not follow the vegetation zones of the other islands. The relatively new lava fields and surrounding soils have not developed the sufficient nutrients required to support the varied life zones found on other islands. Another obvious difference occurs on Volcan Wolf
and Cerro Azul, these volcanoes loft above the cloud cover and are arid on top.Isabela's rich animal, bird, and marine life is beyond compare. Isabela is home to more wild tortoises than all the other islands. Isabela's large size and notable topography created barriers for the slow moving tortoises; apparently the creatures were unable to cross lava flows and other obstacles, causing several different sub-species of tortoise to develop. Today
tortoises roam free in the calderas of Alcedo, Wolf, Cerro Azul, Darwin and Sierra Negra.Other noted species include penguins, cormorants, marine iguanas, boobies, pelicans and Sally lightfoot crabs abound. Galapagos Land Iguanas and Darwin Finches, Galápagos Hawks, Galápagos Doves and very interesting lowland vegetation. The west coast of Isabela in the Bolivar Channel is the best place in Galapagos for viewing wha
les and dolphin.The third-largest human settlement of the archipelago, Puerto Villamil, is located at the south-eastern tip of the island.
September 2009
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