Jewett C. Gilson, Wealth of the World's Waste Places and Oceania
“ The chief divisions of Oceania are Australasia, Melanesia, Micronesia, and Polynesia. Australia, the largest body of land, is usually regarded as a continent. Nearly all the smaller islands are of coral or of volcanic origin; in many instances both agencies have contributed to their formation. The coral and volcanic islands seem to be the tops of mountain ranges that, little by little, have sunk, until only their higher summits are now above sea level.The central part of the Pacific Ocean is pre-eminently the home of the reef-building coral. ”
