Everetts Quarry, Kakanui (Oligocene of New Zealand)

Where: New Zealand (45.2° S, 170.9° E: paleocoordinates 52.0° S, 172.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ototara Formation, Rupelian (33.9 - 28.1 Ma)

• The Ototara Limestone ranges in age from Kaiatan to Early Whaingaroan (Edwards et al. 1991). The d18O values for brachiopods from Everett’s Quarry are the highest for any Lower Oligocene brachiopods and possibly correspond with either Antarctic glacial maxima Oi-1a or Oi-1b (Buening et al. 1998). This would place the Ototara Limestone at Everett’s Quarry in the C13n magnetic chronozone just after the Eocene/Oligocene boundary, with deposition occurring between 33.6 and 33 Ma (Buening et al. 1998).

• group of beds-level stratigraphic resolution

Environment/lithology: poorly lithified, shelly/skeletal limestone

• The bryozoan facies of the Ototara Limestone was produced and often deposited at a depth of 30-60 m. It is likely that the Ototara Limestone that blanketed the area after the cessation of volcanism was laid down over a number of partially eroded volcanoes that formed a submarine volcanic high on the sea floor. Subjected to high-velocity tidal currents.
• Bioclastic limestone, open-textured and soft in most places. Contains friable horizons. Poorly lithified based on washing/sieving methodology in Robinson & Lee, 2011.

Size class: macrofossils

Reposited in the USNM

Primary reference: G. A. Cooper. 1983. The Terebratulacea (Brachiopoda) Triassic to Recent: a study of the brachidia (loops). Smithsonian Contributions to Paleobiology 50:1-290 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 187643: authorized by Matthew Clapham, entered by Matthew Clapham on 06.08.2017, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Terebratulida - Terebratulidae
Bivalvia
 Pectinida - Dimyidae
Dimya sp. Rouault 1850 scallop
 Pectinida - Anomiidae
Anomia trigonopsis Hutton 1873 jingle
Pododesmus sp. Philippi 1837 scallop
 Ostreida - Ostreidae