Oligo-Miocene unconformities in North Otago and the Tasman Sea
- 1 June 1987
- journal article
- research article
- Published by Taylor & Francis in Journal of the Royal Society of New Zealand
- Vol. 17 (2) , 177-180
- https://doi.org/10.1080/03036758.1987.10423344
Abstract
The stratigraphie ranges of key planktonie foraminifera, in Oligo-Miocene sections at Kokoamu Cliff and Earthquakes in North Otago and in the Deep Sea Drilling Project Site 593 in the Tasman Sea, have been correlated with a recently published time-scale. There appear to be two unconformities at Kokoamu Cliff, with durations of c. 2 Ma and c. 5 Ma; two at Earthquakes, with c. 2 Ma and c. 6.4 Ma intervals; and at the DSDP Site 593 a possible unconformity with a duration of c. 7 Ma. An alternative postulate, that there are no time-signifieant unconformities in the North Otago sections, is also considered, and the problem of the Dontroonian Stage discussed.Keywords
This publication has 5 references indexed in Scilit:
- The opening of Drake PassagePublished by Elsevier ,2003
- Jurassic to Paleogene: Part 2 Paleogene geochronology and chronostratigraphyGeological Society, London, Memoirs, 1985
- Mid Tertiary Unconformities in the Waitaki Subdivision, North OtagoJournal of the Royal Society of New Zealand, 1984
- Middle Oligocene cooling from equatorial Pacific DSDP Site 77BGeology, 1984
- Unconformities of the North AtlanticPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1980