S136/f568 - Ardgowan [Rifle Butts Fm] (Miocene of New Zealand)

Also known as GS945, GS3879, GS5671

Where: New Zealand (45.1° S, 171.0° E: paleocoordinates 49.9° S, 178.3° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Rifle Butts Formation (Kaierero Group), Altonian (19.0 - 15.9 Ma)

• STRATIGRAPHIC RELATIONS: From the Rifle Butts Fm, which gradationally overlies the Gee Greensand of the Kaierero Group, and is overlain by the Kurow Group. AGE: Hutchisonian-Awamoan in text of Gage (1957); late Altonian = Burdigalian-earliest Langhian; hereby assigned to the Altonian. STRATIGRAPHIC POSITION: Lower part of the formation.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, fine-grained, glauconitic, shelly/skeletal, gray, green sandstone

• ENVIRONMENT: Shallow marine, siliciclastic. Increasingly rapid accumulation of sediment in deepening water.
• SPECIFIC LITHOLOGY: Fine, glauconitic, greenish-grey sandstone containing brachiopods and molluscs grading up to a fine silt or mudstone. Concretionary bands and layers of tabular concretions indicate bedding in otherwise unstratified sediment. Fossils are disseminated through the silt, and also entombed in concretions and concentrated in shell-limestone lenses. LITHIFICATION: Poorly lithified, largely assumed, as no indication is given text of lithification state, except that concretionary layers are contrasted with the background lithology.

Size class: macrofossils

Preservation: concretion

Reposited in the IGNS

Collection methods: quarrying,

• COLLECTOR: Collected by Park (1915-1916). 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 67899: authorized by Austin Hendy, entered by Austin Hendy on 14.12.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalvia, gastropoda, and polyplacophora. IDENTIFIER: Identifications compiled from previously published accounts and reassessments of NZGS collections, by various paleontologists. NOMENCLATURE: Somewhat antiquated but identified by specialist and often to subgeneric and species resolution.
Bivalvia
 Arcida - Cucullaeidae
 Pectinida - Pectinoidae
Lentipecten hochstetteri Zittel 1864 scallop
 Pectinida - Anomiidae
Anomia trigonopsis Hutton 1873 jingle
 Carditida - Crassatellidae
Spissatella trailli Hutton 1873 clam
 Carditida - Carditidae
 Pholadida - Corbulidae
"Notocorbula pumila" = Corbula (Notocorbula) clam
Notocorbula humerosa Hutton 1885 clam
 Cardiida - Mactridae
 Cardiida - Veneridae
Dosinia (Raina) bensoni Marwick 1927 venus clam
Kuia vellicata venus clam
 Cardiida - Cardiidae
Hedecardium cf. greyi Hutton 1873 cockle
 Hiatellida - Hiatellidae
"Panope cf. orbita" = Panopea
"Panope cf. orbita" = Panopea clam
 Nuculida - Nuculidae
 Protobranchia -
 Protobranchia - Sareptidae
"Ovaleda ardgowanica" = Sarepta
"Ovaleda ardgowanica" = Sarepta clam
Gastropoda
 Ptenoglossa - Epitoniidae
 Cephalaspidea - Retusidae
 Neogastropoda - Buccinidae
"Verconella marwicki" = Penion marwicki Finlay 1930 true whelk
 Neogastropoda - Buccinulidae
"Austrofusus spiniferus" = Aethocola (Aethocola) spinifera
"Austrofusus spiniferus" = Aethocola (Aethocola) spinifera Finlay and McDowall 1923 snail
 Neogastropoda - Nassariidae
"Hima (Mirua) socialis" = Nassarius (Hima)
"Hima (Mirua) socialis" = Nassarius (Hima) snail
 Neogastropoda - Fasciolariidae
 Neogastropoda - Cancellariidae
 Neogastropoda - Marginellidae
"Marginella (Glabella) conica" = Glabella
"Marginella (Glabella) conica" = Glabella margin shell
 Neogastropoda - Volutidae
 Neogastropoda - Turbinellidae
 Neogastropoda - Muricidae
"Xymenella lepida" = Xymene, Murexsul proavitus
"Xymenella lepida" = Xymene murex snail
Murexsul proavitus murex snail
 Neogastropoda - Volutomitridae
Proximitra rutidoloma, "Parvimitra ponsatanae" = Peculator (Parvimitra)
"Parvimitra ponsatanae" = Peculator (Parvimitra) snail
 Neogastropoda - Mangeliidae
 Neogastropoda - Drilliidae
 Neogastropoda - Turridae
 Neogastropoda - Mitromorphidae
Scrinium sp. Hedley 1922 snail
 Neogastropoda -
 Neogastropoda - Horaiclavidae
 Neogastropoda - Borsoniidae
Bathytoma haasti Hutton 1877 snail
 Neogastropoda - Conidae
"Conospirus cf. huttoni" = Conilithes
"Conospirus cf. huttoni" = Conilithes cone shell
 Neogastropoda - Pseudomelatomidae
 Stromboidea - Struthiolariidae
 Vanikoroidea - Eulimidae
? Eulima sp. Risso 1826 snail
 Naticoidea - Naticidae
Tanea socia moon snail
Sinum infirmum moon snail
 Calyptraeoidea - Calyptraeidae
Sigapatella inflata slipper shell
 Tonnoidea - Cassidae
Galeodea apodemetes, "Euspinacassis emilyae" = Echinophoria
"Euspinacassis emilyae" = Echinophoria snail
 Sorbeoconcha - Turritellidae
Zeacolpus "n. sp." Finlay 1926 turret shell
 Pyramidelloidea - Pyramidellidae
 Trochoidea - Trochidae
"Venustas suteri" = Calliostoma, "Fautor marwicki" = Calliostoma (Fautor), "Fautor temporemutatus" = Calliostoma (Fautor)
"Venustas suteri" = Calliostoma top snail
INCLUDES: V. suteri suter and V. suteri fragilis
"Fautor marwicki" = Calliostoma (Fautor) top snail
"Fautor temporemutatus" = Calliostoma (Fautor) top snail
Scaphopoda
 Dentaliida - Dentaliidae
"Dentalium mantelli" = Fissidentalium mantelli Zittel 1865 tusk shell
Polyplacophora
 Neoloricata - Leptochitonidae