Ascot Formation (older), Perth Basin: Late/Upper Pliocene, Australia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Hypotrochus monachus
Hypotrochus penetricinctus
Turella morologus
Bivalvia - Arcida - Noetiidae
Arcopsis ? afra
Bivalvia - Arcida - Glycymerididae
Glycymeris informal sp. A Da Costa 1778
Bivalvia - Arcida - Cucullaeidae
Cucullaea corioensis McCoy 1876
Bivalvia - Arcida - Arcidae
Arca ? ventricosa Lamarck 1819
recombined as Lamarcka ventricosa
Bivalvia - Arcida - Limopsidae
Limopsis depressa
Limopsis beaumariensis
Bivalvia - Carditida - Carditidae
Carditidae indet. Fleming 1820
Bivalvia - Lucinida - Lucinidae
Epicodakia perobliqua
Bivalvia - Cardiida - Donacidae
Hemidonax chapmani
Bivalvia - Cardiida - Tellinidae
Tellina (Quadrans) parvitas
original and current combination Quadrans
Tellina (Pseudarcopagia) basedowi Tate 1901
recombined as Macomona basedowi
Strigilla sp. n. sp. Turton 1822
Tellina (Semelangulus) subdiluta
Bivalvia - Cardiida - Veneridae
Placamen sp. Iredale 1925
Timoclea protomarica
Chioneryx cardioides (Lamarck 1818)
Tawera sp. n. sp. Marwick 1927
Notocallista (Striacallista) mollesta
Notocallista (Striacallista) pestis
Bivalvia - Cardiida - Mactridae
Zenatia (Zenatiopsis) sp. (Darragh 1965)
Mactra informal sp. A Linnaeus 1767
Bivalvia - Nuculanida - Nuculanidae
Nuculana (Scaeoleda) sp. n. sp. (Iredale 1924)
Nuculana (Scaeoleda) crassa
Bivalvia - Nuculida - Nuculidae
Leionucula kalimnae
Gastropoda - Lepetellida - Haliotidae
Haliotis ? cyclobates
Gastropoda - Skeneidae
Solariorbis sp. n. sp. Conrad 1865
Gastropoda - Trochidae
Leiopyrga informal sp. A Adams 1863
Gastropoda - Solariellidae
Solariella (Spectamen) informal sp. A Wood 1842
Gastropoda - Janthinidae
Hartungia dennanti
Subspecies: H. dennanti chavani
Gastropoda - Litiopidae
Alaba pagodula
Gastropoda - Cerithiidae
Cerithium sp. n. sp. Bruguière 1789
Bittium subgranarium
Gastropoda - Naticidae
Natica gualteriana Récluz 1843
Polinices (Conuber) balteatella (Tate 1893)
Polinices (Conuber) cf. subvarians
Gastropoda - Rissoidae
Rissoina elegantula
Rissoina axisculpta
Gastropoda - Neogastropoda - Nassariidae
Nassarius ? nuttalli
Nassarius sp. Duméril 1806
Gastropoda - Neogastropoda - Olividae
Belloliva nymphalis
Oliva sp. n. sp. Bruguière 1789
Gastropoda - Neogastropoda - Volutidae
Amoria cf. undulata
Subspecies: Amoria cf. undulata masoni
Gastropoda - Neogastropoda - Muricidae
Bedeva cf. crassiplicata
Bedeva paivae Crosse 1864
Gastropoda - Struthiolariidae
Tylospira sp. n. sp. Harris 1897
Gastropoda - Ranellidae
Cabestana ? tabulata
Subspecies: C. tabulata tabulata?
see common names

Geography
Country:Australia State/province:Western Australia
Coordinates: 32.1° South, 115.9° East (view map)
Paleocoordinates:34.1° South, 114.8° East
Geographic resolution:local area
Time
Period:Neogene Epoch:Pliocene
Stage:Piacenzian 10 m.y. bin:Cenozoic 6
Key time interval:Late/Upper Pliocene
Age range of interval:3.60000 - 2.58000 m.y. ago
Stratigraphy
Formation:Ascot
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: Unconformably overlies Albian-Cenomanian Osborne Fm (Cockbain 1980). Minor transitional units (Balme 1980) separate the top of the Ascot Fm from both the Bassendean Sand and the Guildford Fm (Low 1971; Playford et al. 1976) THICKNESS: Approximately 20 m in figure well logs. AGE: Extended discussion of age in text (Kendrick et al., 1991), but generally regarded as Late Pliocene on the basis of molluscan and foraminiferal biostratigraphy, well-dated presumed correlatives and the age of bounding units. STRATIGRAPHIC POSITION: From "older" Ascot Formation, presumably lower in the stratigraphic succession, or encountered in wells further up dip.
Lithology and environment
Primary lithology:very coarse,brown,gray,yellow unlithified calcareous sandstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Very coarse, grey to yellow-brown quartz sands with subordinate carbonate and less frequently quartzose calcarenites. LITHIFICATION: Presumed to be unlithified given age, siliciclastic nature and limited carbonate.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Environmental data not reported. Presumably shallow water, siliciclastic fauna.
Taphonomy
Modes of preservation:body,original aragonite,original calcite
Size of fossils:macrofossils
Preservation of anatomical detail:excellent
Collection methods and comments
Collection methods:selective quarrying,survey of museum collection
Reason for describing collection:biostratigraphic analysis
Collection method comments: COLLECTOR: Faunal list is a composite of decades of collecting effort, including that reported by Darragh and Kendrick (1971), Kendrick (1981), Ponder (1985), and Kendrick unpublished data. REPOSITORY: Collection assembled from material reposited in Western Australian Museum (WAM).
Taxonomic list comments:COMPLETENESS: Not exhaustive (stated to be selective, presumably on the basis of biogeographic utility of taxa), but certainly comprehensive. NOMENCLATURE: Not an authoritative publication, but nomenclature appears modern with extensive subgeneric and species-level assignments.
Metadata
Database number:63352
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2006-08-11 20:59:13 Last modified:2013-11-25 13:37:23
Access level:the public Released:2006-08-11 20:59:12
Creative Commons license:CC BY
Reference information

Primary reference:
18220. G. W. Kendrick, K.-H. Wyrwoll, and B.J. Szabo. 1991. Pliocene-Pleistocene coastal events and history along the western margin of Australia. Quaternary Science Reviews 10:419-439 [A. Miller/A. Hendy]