S136/f575 - Tapui Railway Tunnel [Incholme Mbr, Tapui Glauconitic Sst] (Eocene of New Zealand)

Also known as GS3883

Where: New Zealand (45.0° S, 170.7° E: paleocoordinates 52.5° S, 167.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Gardiner Greensand Member (Tapui Glauconitic Sandstone Formation), Bartonian (41.3 - 38.0 Ma)

• STRATIGRAPHIC RELATIONS: From Incholme Glauconitic Sand Mbr of the Tapui Glauconitic Sand Fm, immediately overlying the Kauru Fm (Teurian), and overlain locally by Raki Siltstone (Kaiatan). AGE: upper Bortonian of Gage (1957) = Bartonian. STRATIGRAPHIC POSITION: From upper member within the formation.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, fine-grained, glauconitic, micaceous, calcareous, carbonaceous sandstone

• ENVIRONMENT: Deposited in still water beyond reach of strong wave action.
• SPECIFIC LITHOLOGY: Fine calcareous micaceous sand, with fine glauconite and unusually fine, disseminated carbonaceous material. LITHIFICATION: Presumably lithified, based on facies description (detailed in Gage 1957), taphonomy, and age.

Size class: macrofossils

Preservation: cast, mold/impression, concretion

Reposited in the IGNS

Collection methods: quarrying,

• COLLECTOR: Collected by various authors, which may include: Marwick (1924-1944), Laws (1930-1941), and Powell (1942). REPOSITORY: New Zealand Geological Survey (now GNS Science, Lower Hutt, New Zealand).

Primary reference: M. Gage. 1957. The Geology of the Waitaki Subdivision. New Zealand Geological Survey Bulletin 55 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 64732: authorized by Austin Hendy, entered by Austin Hendy on 13.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalvia, gastropoda, and brachiopoda. IDENTIFIER: J.A. Marwick and O.P Olson(NZGS). NOMENCLATURE: Somewhat antiquated but identified by specialist and often to subgeneric and species resolution.
Bivalvia
 Arcida - Glycymerididae
"Glycymeris (Glycymerita) cf. subglobosa" = Glycymerita
"Glycymeris (Glycymerita) cf. subglobosa" = Glycymerita clam
 Arcida - Cucullaeidae
Cucullaea sp. Lamarck 1801 clam
 Ostreida - Ostreidae
Ostrea "n. sp." Linnaeus 1758 oyster
 Carditida - Crassatellidae
"Crassatellites australis" = Crassatella
"Crassatellites australis" = Crassatella clam
 Carditida - Carditidae
 Cardiida - Tellinidae
Tellina sp. Linnaeus 1758 tellin clam
 Cardiida - Veneridae
Dosinia sp. Scopoli 1777 venus clam
Gastropoda
 Cerithioidea - Turritellidae
Zeacolpus "n. sp." Finlay 1926 turret shell
 Sorbeoconcha - Naticidae
 Sorbeoconcha - Ficidae
"Proficus "n. sp."" = Priscoficus
"Proficus "n. sp."" = Priscoficus Conrad 1866 fig shell
 Neogastropoda - Volutidae
 Sorbeoconcha - Cassidae