Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Vol. 16 No. 5 (2006): Jurnal Sumber Daya Geologi

The Age And Paleoenvironment of The Pakaurangi Formation, Waitakere Group, Northland, New Zealand, Based on Ostracoda

Fauzie Hasibuan (Unknown)
A.R Hasibuan (Unknown)
Sudijono Sudijono (Unknown)



Article Info

Publish Date
26 Nov 2017

Abstract

The Early Miocene Pakaurangi Formation, Waitakere Group, have a high diversity of Ostracoda. Key species include Loxoconcha propunctata, Bradleya semiarata, Bradleya lactea pakaurangia, Hemycythere tarakohensis and Bairdia canterburyensis, and indicate an Altonian age, completely in agreement with foraminiferal ages from this area by other workers.The species Trachyleberis zeacristata Hornibrook is transferred to Henryhowella. Paijenborchella iocosa Kingma, and many generic level taxa were also found in a borehole in Bojonegoro, East Jawa, Indonesia. The previously recorded Clifdenian to Waitotaran range of Henryhowella probesioides Hornibrook is extended downwards into the Altonian. The Ostracoda also show the paleoenvironment of the Pakaurangi Formation to be littoral to neritic, which is also in agreement with the evidence of foraminifera and molluscs as reported by previous workers. Keywords: Ostracoda, Pakaurangi Formation, Waitakere Group, Altonian, New Zealand

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Journal Info

Abbrev

JGSM

Publisher

Subject

Chemistry Earth & Planetary Sciences Energy

Description

The JGSM acts as a publication media of high quality scientific investigations resulted from various geological scientific issues. Published articles covers Geo-sciences, Geo-resources, Geo-hazards, and Geo-environments. Geo-sciences are basic earth sciences in geology, geophysics, and ...