J32/f1 - Stillwater Mudstone, Power Road (Miocene of New Zealand)

Also known as GS 11556

Where: New Zealand (42.5° S, 171.2° E: paleocoordinates 48.7° S, 173.7° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Stillwater Mudstone Formation (Blue Bottom Group), Waiauan (12.7 - 11.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Stillwater Mudstone, which overlies the Inangahua Formation (Otaian-Altonian) and underlies the Eight Mile Formation (Tongaporutuan-Waipipian) of the Blue Bottom Group. The Stillwater Mudstone includes the Tindale Limestone Member. AGE: Macrofossil biostratigraphy indicates a Waiauan-Tongaporutuan age, while microfossils suggest a Waiauan age.

• bed-level stratigraphic resolution

Environment/lithology: deep-water; unlithified, concretionary, gray, blue siltstone

• ENVIRONMENT: Upper, but not uppermost, bathyal environment, probably in the range of 400-800 m.
• SPECIFIC LITHOLOGY: Massive or indistinctly bedded blue-grey siltstone with very little sand-sized material and with scattered, irregularly tabular concretions; macrofossils relatively abundant and locally concentrated in small shell-rich pockets. LITHIFICATION: Unlithified based on figured specimens.

Size class: macrofossils

Preservation: original aragonite, original calcite

Collection methods: quarrying,

• COLLECTOR: A.G. Beu, M. Gage, R.H. Hoskins, S.M. Jarman, P.A. Maxwell, S.G. Nathan. REPOSITORY: Mostly reposited at New Zealand Geological Survey (now GNS Science), Lower Hutt, New Zealand

Primary reference: P. A. Maxwell. 1988. Late Miocene Deep-Water Mollusca from the Stillwater Mudstone at Greymouth, Westland, New Zealand: Paleoecology and Systematics. New Zealand Geological Survey Paleontological Bulletin 55 [A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 63090: authorized by Austin Hendy, entered by Austin Hendy on 04.08.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• COMPLETENESS: Exhaustive for gastropoda, bivalvia and scaphopoda. Some other groups known to be present (decapoda, teleost fish, sharks) but not listed. NOMENLCATURE: Authoritative publication using modern nomenclature.
Gastropoda
 Trochoidea - Skeneidae
Dolicrossea sp. Iredale 1924 snail
 Trochoidea - Solariellidae
 Pseudomelanoidea - Pseudomelaniidae
Leucosyrinx climoi n. sp. snail
 Neogastropoda - Nassariidae
 Neogastropoda - Fasciolariidae
 Neogastropoda - Cochlespiridae
Cochlespira (Cochlespira) sp. n. sp. Conrad 1865 snail
 Neogastropoda - Drilliidae
 Neogastropoda - Mangeliidae
 Neogastropoda - Raphitomidae
Rugobela sp. n. sp. Finlay 1924 snail
 Neogastropoda - Horaiclavidae
 Neogastropoda - Terebridae
Zeacuminia viapollentia n. sp. auger snail
 Neogastropoda - Turridae
 Neogastropoda - Volutomitridae
 Neogastropoda - Ptychatractidae
Exilia wellmani n. sp. snail
 Neogastropoda - Costellariidae
 Neogastropoda - Marginellidae
Serrata flemingi n. sp. margin shell
 Neogastropoda - Muricidae
Terefundus lamelliferus n. sp. murex snail
 Neogastropoda - Cancellariidae
 Sorbeoconcha - Cassidae
Echinophoria sp. Sacco 1890 snail
 Sorbeoconcha - Ranellidae
Sassia sp. n. sp.
Sassia sp. n. sp. Bellardi 1872 triton shell
 Sorbeoconcha - Capulidae
 Sorbeoconcha - Naticidae
Magnatica (Spelaenacca) sp. Finlay 1930 moon snail
Taniella mima moon snail
 Sorbeoconcha - Rissoidae
 Sorbeoconcha - Newtoniellidae
 Heterostropha - Ringiculidae
 Heterostropha - Pyramidellidae
 Heterostropha - Architectonicidae
Wangaloa sp. n. sp.
Wangaloa sp. n. sp. Maxwell 1992 snail
 Opisthobranchia - Cylichnidae
? Cylichna sp. n. sp. Lovén 1846 snail
Scaphander sp. Monfort 1810 snail
Cylichnania sp. Marwick 1931 snail
Bivalvia
 Arcida - Arcidae
Bathyarca aff. cybaea Hedley 1906 clam
 Lucinida - Lucinidae
 Poromyida - Verticordiidae
Euciroa sp. n. sp.
Euciroa sp. n. sp. Dall 1881 clam
 Pholadida - Corbulidae
"Notocorbula innerans" = Corbula (Notocorbula)
"Notocorbula innerans" = Corbula (Notocorbula) clam
 Nuculida - Nuculidae
"Varinucula crepida" = Nucula (Varinucula), "Linucula delli" = Nucula (Linucula), "Deminucula bergmansi n. sp." = Nucula (Deminucula)
"Varinucula crepida" = Nucula (Varinucula) nut clam
"Linucula delli" = Nucula (Linucula) nut clam
"Deminucula bergmansi n. sp." = Nucula (Deminucula) nut clam
 Nuculanida - Tindariidae
"Austrotindaria mawheraensis" = Austrotindaria, "Pseudotindaria catillus n. sp." = Austrotindaria
"Austrotindaria mawheraensis" = Austrotindaria clam
"Pseudotindaria catillus n. sp." = Austrotindaria clam
 Nuculanida - Nuculanidae
"Saccella andrewi" = Nuculana (Saccella) andrewi Marwick 1931 pointed nut clam
Zealeda crassicostata n. sp. pointed nut clam
 Nuculanida - Yoldiidae
 Nuculanida - Malletiidae
Neilo sp. Adams 1854 clam
Scaphopoda
 Dentaliida - Dentaliidae
? Dentalium "sp. A" Linnaeus 1758 tusk shell
 Dentaliida - Laevidentaliidae
Laevidentalium fodinense n. sp. tusk shell