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Navassa Island: A Photographic Tour (1998 - 1999)

Navassa Island Home
Explore Navassa
take a Tour:
geology | biology | history
or Explore:
fly | sail | hike | scuba
Navassa map
Navassa Location Map
Explore Navassa - Biology
Isolated Development

  last pseudopheonix
Navassa's last pseudopheonix
The biological diversity of the island and the fact that Navassa is U.S. territory owe much to the geology of the island. The limestone island is an uplifted atoll in the range of 5 million years old, giving rise to a biota that has been isolated long enough have evolved independently of the biota on surrounding land masses. 10-30m cliffs surround Navassa, making it difficult for organisms to reach the island's high terraces. Surrounding waters are 500 m deep, eliminating the possibility of land connections to larger islands during Pleistocene sea-level lowstands.

  sea fans & coral
sea fans & coral
Fifteen island species are currently recognized as endemic and include land snails, lizards, vascular plants, and possibly a ground dove. Two endemic species, an iguana and curly tailed lizard found on the island during the last century, could not be located and may be extinct. Common on the island as late as 1928, only one specimen of the palm tree Pseudopheonix sargentti saonae var. navassana remains.

Biology - Photo Index
Marine Life
    star coral
    elkhorn coral
    sea fans
    sponge on fans
    brain coral
    fans & coral
    sea cliff base
    star coral
    coral & urchin
    coral & fans
    school of fish
Land Flora
    royal pointciana
    burn area
    burn area
Land Fauna
    bone nuclei

Coastal and Marine Geology Program > St. Petersburg Coastal and Marine Science Center > Navassa Island > Biology Tour

U.S. Department of the Interior, U.S. Geological Survey, Coastal and Marine Geology Program
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Page Content Last Modified: August 2000