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Curtis Island, Kermadec Islands, New Zealand

Latitude: 30°32'32"S
Longitude: 178°33'39"W
Curtis and nearby Cheeseman Islands are the uplifted portion of a submarine volcano astride the Kermadec Ridge. The age of the small islands is considered to be Pleistocene, and rocks consist dominantly, if not entirely, of andesitic pyroclastic-flow deposits (Lloyd, 1992). Curtis Island, only 500 x 800 m in diameter and 137-m high, contains a large, fumarolically active crater whose floor is only 10 m above sea level. Reports of possible historical eruptions probably represent increased thermal activity. Geologic studies have documented a remarkable uplift of 18 m of Curtis Island during the past 200 years, with 7 m of uplift occurring between 1929 and 1964 (Doyle et al., 1979). An active submarine magmatic or solfataric vent is believed to exist near Curtis Island, but its activity cannot unequivocally be associated with Curtis volcano (Lloyd, 1992).

http://www.volcano.si.edu/world/volcano.cfm?vnum=0402-01=

Mineral List

Aluminite
Alunite
Anhydrite
'Chlorite Group'
Cristobalite
Diaspore
Gibbsite
Halloysite-7Å
Hematite
Kaolinite
Natroalunite
Pyrite
Quartz
'Smectite Group'
Sulphur


15 entries listed. 13 valid minerals.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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