Q11/f0041, Powell Bay [Nihotupu Fm] (Miocene of New Zealand)

Where: New Zealand (36.8° S, 174.4° E: paleocoordinates 44.1° S, 176.8° E)

• coordinate based on unpublished field data

• outcrop-level geographic resolution

When: Wairere Member (Nihotupu Formation), Altonian (19.0 - 15.9 Ma)

• STRATIGRAPHIC RELATIONS: Akarana Supergroup, Waitakere Group, Manukau Subgroup, Nihotupu Formation, Wairere Member (Hayward 1976b). AGE: The Wairere Member conformably overlies andesite Maori Bay pillow lavas dated at 16.8 Ma (Bandy et al. 1970), indicating early mid-Altonian (Late Burdigalian). STRATIGRAPHIC POSITION: From 15 m up cliff face.

• bed-level stratigraphic resolution

Environment/lithology: deep-water; lithified, tuffaceous, calcareous sandstone

• ENVIRONMENT: Mid-bathyal
• SPECIFIC LITHOLOGY: Well bedded, laminated, sparsely fossiliferous, epivolcaniclastic arenites and less abundant lutites and granule rudites. LITHIFICATION: Lithfiied, as stated to be moderately hard.

Size class: macrofossils

Preservation: replaced with calcite

Collected by Eagle in 1990

• COLLECTOR: M. K. Eagle. REPOSITORY: Auckland Museum, New Zealand.

Primary reference: M.K. Eagle. 1999. A new early Miocene Pseudarchaster (Asteroida: Echinodermata) from New Zealand. New Zealand Journal of Geology and Geophysics 42:551-556 [L. Villier/L. Villier]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 91055: authorized by Austin Hendy, entered by Austin Hendy on 03.09.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to described taxon and other characteristic taxa mentioned in text. NOMENCLATURE: Authoritative publication, with modern nomenclature and species-resolution identifications.
Bivalvia
 Nuculanida - Nuculanidae
Saccella sp. Woodring 1925 pointed nut clam
 Lucinida - Lucinidae
Lucinoma taylori Powell 1935 clam
Gastropoda
 Neogastropoda - Borsoniidae
 Neogastropoda - Turridae
Gemmula sp. Weinkauff 1875 turrid
 Neogastropoda - Fasciolariidae
 Sorbeoconcha - Naticidae
Asteroidea
 Paxillosida - Pseudarchasteridae
Pseudarchaster motutaraensis n. sp. Eagle 1999 sea star