Tuvalu is comprised of nine small islands, six of them being atoll islands (with lagoons) namely Nanumea, Nui, Vaitupu, Nukufetau, Funafuti, and Nukulaelae. The remaining three,
Nanumanga, Niutao and Niulakita are raised limestone reef islands. None of the islands are more than three metres above sea level, with the biggest island, Vaitupu, having a land area of just over 1000 acres. The total land area is approximately twenty-six square kilometres with a sea area of 900,000 square kilometres. During the pre-independence period, 1938 - 1978,
Ridge to Reef data on the reef outline of Nauru, limited metadata, compiled in 2018
Ridge to Reef Data on Seamounts in Nauru, limited metadata, compiled in 2018
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Ridge to Reef Data, Grassland Vegetation Class, Limited Metadata, Compiled in 2018
Ridge to Reef data, mining class, limited metadata, compiled in 2018
Ridge to Reef Data, Open Land in Nauru, limited metadata, compiled in 2018
Ridge to Reef Data on Sand Bay in Nauru, limited metadata, compiled in 2018
Ridge to Reef Data, Secondary Forest in Nauru, limited metadata, compiled in 2018
Ridge to Reef data on Nauru's settlement, limited metadata, compiled in 2018
Nauru, in the central Pacific Ocean, is a raised atoll capping a volcanic seamount arising from an ocean floor depth of 4300m. The land area is 22km, and the island rises to 70m above sea level. Drilling has proved dolomitised limestone of upper Miocene or younger age to a depth of 55m below sea level. Gravity and magnetic surveys indicate that the limestone probably overlies volcanic bedrock at a depth of about 500m. Reverse-circulation drilling and geoelectrical probes indicate that there is a discontinuous freshwater layer averaging 5m thick beneath Nauru.
Ridge to reef data on Nauru's water sources, limited metadata, compiled in 2018
Ridge to Reef Data on the Common Hazard Areas on Anabar, Nauru. Limited metadata compiled in 2018
Ridge to Reef Data on Food Sources on Anabar, Nauru. Limited metadata, compiled in 2018
Ridge to Reef data on water sources for Anabar, Nauru. Limited metadata, compiled in 2018
Ridge to Reef data showing locations where household surveys took place, limited metadata, compiled in 2018
Ridge to Reef data on the locations of Traditional and Cultural Heritage Sites on Nauru, limited metadata, compiled in 2018
Ridge to Reef Data on the location of Water Tanks on Buada and Ijuw, limited metadata, compiled in 2018
Ridge to Reef Data on Vegetation Type A located on Nauru, limited metadata, compiled for 1994 and earlier
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