S136/f499 - Rifle Butts Fm, Awamoa (Miocene of New Zealand)

Also known as GS169, GS1160; Coll# 3082 (Hendy PhD)

Where: New Zealand (45.1° S, 170.9° E: paleocoordinates 49.9° S, 178.4° 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: GS170 collected by McKay (1876); GS1160 collected by Vaughan, Marshall and Marwick (1923). 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 67896: authorized by Austin Hendy, entered by Austin Hendy on 14.12.2006, edited by Mark Uhen

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.
Gastropoda
 Trochoidea - Skeneidae
 Trochoidea - Trochidae
"Venustas suteri" = Calliostoma
"Venustas suteri" = Calliostoma top snail
 Epitonioidea - Epitoniidae
 Neotaenioglossa - Trichotropidae
 Neotaenioglossa - Calyptraeidae
Sigapatella maccoyi slipper shell
Zegalerus peramplus slipper shell
 Cerithioidea - Turritellidae
Zeacolpus abscisa turret shell
Zeacolpus pukeuriensis Marwick 1934 turret shell
 Pseudomelanoidea - Pseudomelaniidae
 Sorbeoconcha - Struthiolariidae
Struthiolaria subspinosa Marwick 1924 snail
 Neogastropoda - Ancillariidae
"Baryspira (Alocospira) hebera" = Amalda (Baryspira), "Baryspira gigartoides" = Amalda (Baryspira)
"Baryspira (Alocospira) hebera" = Amalda (Baryspira) snail
"Baryspira gigartoides" = Amalda (Baryspira) snail
 Neogastropoda - Buccinidae
"Verconella marwicki" = Penion marwicki Finlay 1930 true whelk
 Neogastropoda - Siphonaliidae
 Neogastropoda - Nassariidae
"Hima (Mirua) socialis" = Nassarius (Hima)
"Hima (Mirua) socialis" = Nassarius (Hima) snail
 Neogastropoda - Fasciolariidae
 Neogastropoda - Conidae
"Conospirus huttoni" = Conilithes
"Conospirus huttoni" = Conilithes cone shell
 Neogastropoda - Raphitomidae
 Neogastropoda - Turridae
 Neogastropoda - Volutomitridae
"Parvimitra pukeuriensis" = Peculator (Parvimitra) snail
 Neogastropoda - Columbariidae
 Neogastropoda - Marginellidae
"Marginella (Glabella) conica" = Glabella, "Marginella (Glabella) fraudulenta" = Glabella, Marginella harrisi
"Marginella (Glabella) conica" = Glabella margin shell
"Marginella (Glabella) fraudulenta" = Glabella margin shell
Marginella harrisi margin shell
 Neogastropoda - Muricidae
 Neogastropoda - Volutidae
Alcithoe reflexa, Alcithoe (Leporemax) ? scopi, "Waihaoia (Pachymelon) murdochi" = Alcithoe (Waihaoia), "Waihaoia (Teremelon) awamoaensis" = Alcithoe (Waihaoia), Spinomelon mira
"Waihaoia (Pachymelon) murdochi" = Alcithoe (Waihaoia) volute
"Waihaoia (Teremelon) awamoaensis" = Alcithoe (Waihaoia) volute
 Neogastropoda - Cancellariidae
 Sorbeoconcha - Ficidae
 Sorbeoconcha - Cassidae
Galeodea apodemetes, "Euspinacassis emilyae" = Echinophoria
"Euspinacassis emilyae" = Echinophoria snail
 Sorbeoconcha - Ranellidae
"Austrosassia maoria" = Sassia
"Austrosassia maoria" = Sassia triton shell
 Sorbeoconcha - Triviidae
Trivia sp. Broderip 1837 snail
 Sorbeoconcha - Eratoidae
Proterato sp. Schilder 1927 snail
Proterato "n. sp." Schilder 1927 snail
Proterato awamoana Schilder 1933 snail
 Sorbeoconcha - Naticidae
"Polinella modesta" = Polinices (Polinella) moon snail
Tanea socia moon snail
 Sorbeoconcha - Rissoidae
"Linemera awamoaensis" = Alvania (Linemera)
"Linemera awamoaensis" = Alvania (Linemera) snail
 Sorbeoconcha - Newtoniellidae
 Sorbeoconcha - Cerithiopsidae
 Heterostropha - Acteonidae
Acteon sp. Montfort 1810 snail
 Heterostropha - Pyramidellidae
  -
"Zeminolia carinata" = Spectamen
"Zeminolia carinata" = Spectamen snail
Bivalvia
 Arcida - Arcidae
 Arcida - Limopsidae
 Pectinida - Limidae
Lima colorata Hutton 1873 file clam
 Pectinida - Pectinoidae
 Carditida - Carditidae
"Venericardia cf. perscrupulosa" = Purpurocardia perscrupulosa, Venericardia awamoensis
"Venericardia cf. perscrupulosa" = Purpurocardia perscrupulosa Marwick 1932 clam
 Carditida - Crassatellidae
Spissatella trailli Hutton 1873 clam
 Nuculanida - Malletiidae
Actinopteri
 Gadiformes - Macrouridae
Macrurus toulai1 Schubert 1906 grenadiers
 Pleuronectiformes - Pleuronectidae
Pleuronectidarum acuminatus1 Koken 1891 flatfish
 Myctophiformes - Myctophidae
Scopelus sulcatus1 Bassoli 1906 lanternfish