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A model for the development of types of atolls and volcanic islands on the Pacific lithospheric plate

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dc.contributor.author Scott, G. A. J.
dc.contributor.author Rotondo, G. M.
dc.date.accessioned 2017-09-15T20:43:03Z
dc.date.available 2017-09-15T20:43:03Z
dc.date.issued 1983-09
dc.identifier.citation G. A. J. Scott and G. M. Rotondo, A model for the development of types of atolls and volcanic islands on the Pacific lithospheric plate. Atoll Research Bulletin no. 260 (September 1983). en_US
dc.identifier.issn 0077-5630
dc.identifier.uri http://hdl.handle.net/10680/1295
dc.description "This paper is an expansion of a paper first delivered to the Annual Meeting of the Association of Canadian Geographers at Laval University, Quebec, May 1976." en_US
dc.description.abstract A literature review on atoll origins and volcanic island development on the Pacific lithospheric plate is combined with bathymetric data on the Hawaiian, Marshall, Caroline, Tuamotu and Society island chains to produce a model which helps explain the development of all major Pacific plate island types. This model incorporates the concept that as new lithosphere is formed along the East Pacific Rise older crust moves north-west towards Asia, cools and causes ocean deepening. Some distance from the East Pacific Rise relatively fixed melting anomalies produce volcanic island chains. In warmer waters these islands develop fringing reefs which continue to grow to wave level as the islands are carried on the cooling plate into deeper water. Raised volcanic island forms can develop on arches produced by the isostatic subsidence of new magmatic outpourings close by. As volcanic islands with fringing reefs move into deeper water almost-atolls and finally true atolls develop. Partly raised and raised forms result if atolls rise over minor upwarps on the crust produced by, 1) asthenospheric bumps, 2) arch flexuring resulting from isostatic subsidence of nearby magmatic outpourings, 3) compression within the lithosphere alongside Pacific plate subduction zones. The model also helps explain certain types of drowned atolls and guyots. en_US
dc.description.sponsorship "Financial assistance from the University of Winnipeg is acknowledged." en_US
dc.language.iso en en_US
dc.publisher The Smithsonian Institution, Washington, D.C. en_US
dc.relation.ispartofseries Atoll Research Bulletin;260
dc.title A model for the development of types of atolls and volcanic islands on the Pacific lithospheric plate en_US
dc.type Technical Report en_US
dc.provenance Extracted from Smithsonian Libraries collection at https://archive.org/details/atollresearch26027219smit.


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