GS3329, Mangamaire Stream: Tortonian, New Zealand
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Cephalopoda
- Nautilida
- Aturiidae
|
||||||||||
|
Aturia coxi
Miller 1947
|
||||||||||
| A. grangei in Fleming, 1945 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | New Zealand |
| Coordinates: | 38.9° South, 175.2° East (view map) |
| Paleocoordinates: | 43.7° South, 176.9° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Tortonian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Tortonian | ||
| Age range of interval: | 11.63000 - 7.24600 m.y. ago |
Stratigraphy
| Formation: | Mohakatino | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Basal tuff bed of Mohakatino Formation. Maier et al. (2016) conducted detailed biostratigraphic and geochronologic dating. A sample 15 m above the base contains a rich planktic foraminiferal fauna with common Hirsutella panda in conjunction with a sinistrally coiled population of Globoconella miotumida and rare specimens of Paragloborotalia mayeri s.l. This combination of taxa indicates this sample is correlated with the top of the upper Hr. panda acme zone, above the stratigraphic top of the Mapiri Coiling Zone, and that it has a correlated age of 10.65 Ma. Dextrally coiled specimens of Neogloboquadrina incompta at 74 m, the only specimens of Nq. incompta that have been identified in the lower part of the coastal section, are correlated with the upper part of the Glomar Coiling Zone (GCZ), above the stratigraphic level of the lowest common occurrence of species associated with the Nq. pachyderma-incompta group. This interval has a correlated age of 10.36–10.39 Ma. An ash bed 80 m above the base of the formation yielded a U-Pb zircon age of 10.63 ± 0.65 Ma. | |||||
Lithology and environment
| Primary lithology: | tuffaceous lithified "siliciclastic" |
| Environment: | submarine fan |
| Geology comments: According to Shumaker et al. (2018): The Mohakatino Formation has been interpreted previously as a deep-water volcanogenic apron or fan delta (Nodder et al., 1990a). However, submarine volcanic apron facies documented elsewhere are characterized by common dyke intrusions and lava flows that are interbedded or in close lateral association with re-sedimented volcanogenic deposits (e.g. Gamberi, 2001; Allen et al., 2007; Corral et al., 2013). Primary volcanic deposits and intrusions are absent from the Mohakatino Formation in the study area. The findings of the current study instead suggest a submarine lobe environment, implying greater transport distances for the volcanogenic sediments than in an apron setting. Deposited in middle to lower bathyal water depths (Nodder et al., 1990a). | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | IGNS |
Metadata
| Database number: | 180124 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2016-07-08 19:45:59 | Last modified: | 2019-09-07 15:18:15 |
| Access level: | the public | Released: | 2016-07-08 19:45:59 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 59708. | A. G. Beu. 1973. Nautiloids of the genus Aturia from the uppermost Miocene of Australia and New Zealand. Science Reports of the Tohoku University. Second Series, Geology. Special Volume (Hatai Memorial Volume) 6:297-308 [M. Clapham/M. Clapham] |