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Caves and speleogenesis of Mangaia, Cook Islands
Citation
Ellison, JC, Caves and speleogenesis of Mangaia, Cook Islands, Atoll Research Bulletin, No. 417 pp. 1-25. ISSN 0077-5630 (1994) [Refereed Article]
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Copyright Statement
Copyright 1994 The Author
DOI: doi:10.5479/si.00775630.417.1
Abstract
Ten caves in the makatea limestone of Mangaia, Cook Islands were explored and mapped, totalling over 3.7 km of passage. Of these, there was an apparent grouping by elevation that corresponds with previously described sea-level terraces in the makatea. Four caves have major level sections 10-20 m above sea-level, corresponding with a 14.5 m Pleistocene terrace. The high dimensions of these caves indicate downcutting during slow uplift, or multiple reoccupations by highstands of Pleistocene sealevels. One major cave has level passage 20-30 m above sea-level, corresponding with a 26-27.5 m terrace. Three caves have level passage 40 m above sea-level, corresponding with a m terrace. Active conduit caves are developed at the present sea-level, but are closed with heavy clay deposits from recent soil erosion.
Item Details
Item Type: | Refereed Article |
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Keywords: | makatea, sea-level change, cave formation |
Research Division: | Earth Sciences |
Research Group: | Physical geography and environmental geoscience |
Research Field: | Geomorphology and earth surface processes |
Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
Objective Group: | Understanding climate change |
Objective Field: | Effects of climate change on the South Pacific (excl. Australia and New Zealand) (excl. social impacts) |
UTAS Author: | Ellison, JC (Associate Professor Joanna Ellison) |
ID Code: | 132760 |
Year Published: | 1994 |
Deposited By: | Geography and Spatial Science |
Deposited On: | 2019-05-20 |
Last Modified: | 2019-06-12 |
Downloads: | 0 |
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