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

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Hypotrochus monachus
Turella morologus
Bivalvia - Nuculida - Nuculidae
Leionucula kalimnae
Bivalvia - Nuculanida - Nuculanidae
Nuculana (Scaeoleda) sp. n. sp. (Iredale 1924)
Nuculana (Scaeoleda) crassa
Bivalvia - Pectinida - Pectinidae
Pecten sp. Müller 1776
Chlamys (Equichlamys) bifrons (Lamarck 1819)
recombined as Equichlamys bifrons
Subspecies: C. (E.). bifrons bifrons
Bivalvia - Arcida - Glycymerididae
Glycymeris informal sp. A Da Costa 1778
Glycymeris informal sp. B Da Costa 1778
Glycymeris striatularis
Bivalvia - Arcida - Noetiidae
Arcopsis afra
Bivalvia - Arcida - Arcidae
Arca ventricosa Lamarck 1819
recombined as Lamarcka ventricosa
Bivalvia - Arcida - Limopsidae
Limopsis depressa
Limopsis forteradiata
Bivalvia - Lucinida - Lucinidae
Epicodakia perobliqua
Anodontia sphericula (Basedow 1902)
Bivalvia - Cardiida - Mactridae
Zenatia (Zenatiopsis) sp. (Darragh 1965)
Mactra informal sp. B Linnaeus 1767
Bivalvia - Cardiida - Mesodesmatidae
Anapella cycladea Lamarck 1818
Bivalvia - Cardiida - Veneridae
Anomalocardia sp. n. sp. Schumacher 1817
Placamen placidum
Katelysia rhytiphora Lamy 1937
Katelysia scalarina Lamarck 1818
Chioneryx cardiodes
Tawera informal sp. A Marwick 1927
Tawera informal sp. B Marwick 1927
Bivalvia - Cardiida - Donacidae
Donax (Plebidonax) deltoides (Lamarck 1818)
original and current combination Donax deltoides
Hemidonax chapmani
Bivalvia - Cardiida - Tellinidae
Tellina (Pseudarcopagia) basedowi Tate 1901
recombined as Macomona basedowi
Strigilla sp. Turton 1822
Tellina (Semelangulus) subdiluta
Tellina (Pseudarcopagia) victoriae (Gatliff 1914)
Tellina (Tellinella) sp. (Mörch 1853)
Bivalvia - Carditida - Carditidae
Carditidae indet. Fleming 1820
Cardita crassicosta Lamarck 1819
Gastropoda - Naticidae
Natica gualteriana Récluz 1843
Gastropoda - Littorinidae
Bembicium vittatum
Gastropoda - Rissoidae
Rissoina elegantula
Gastropoda - Neogastropoda - Cancellariidae
Sydaphera undulata
Gastropoda - Neogastropoda - Volutidae
Lyria mitraeformis (Lamarck 1811)
Subspecies: L. mitraeformis mitraeformis
Nannamoria strophodon
Gastropoda - Neogastropoda - Muricidae
Bedeva paivae Crosse 1864
Gastropoda - Neogastropoda - Olividae
Belloliva nymphalis
Oliva australis Duclos 1835
recombined as Oliva (Strephona) australis
Gastropoda - Neogastropoda - Conidae
Conus anemone
Gastropoda - Neogastropoda - Nassariidae
Fusus bednalli
Nassarius nuttalli
Nassarius sp. n. sp. Duméril 1806
Gastropoda - Ranellidae
Cabestana tabulata
Subspecies: C. tabulata tabulata
Gastropoda - Cassidae
Cassis (Hypocassis) fimbriata Quoy 1833
Semicassis pyrum (Lamarck 1822)
Gastropoda - Struthiolariidae
Tylospira sp. n. sp. Harris 1897
Gastropoda - Campanilidae
Campanile symbolicum Iredale 1917
Gastropoda - Litiopidae
Alaba pagodula
Gastropoda - Cerithiidae
Semivertagus subcalvatus
spelled with current rank as Clava (Semivertagus)
Bittium icarus
Gastropoda - Turritellidae
Gazameda iredalei Finlay 1927
Gastropoda - Turbinidae
Turbo (Ninella) torquatus Gmelin 1791
Gastropoda - Solariellidae
Solariella (Spectamen) informal sp. B Wood 1842
Gastropoda - Trochidae
Leiopyrga informal sp. B Adams 1863
Clanculus (Isoclanculus) philippi
Gastropoda - Lepetellida - Haliotidae
Haliotis cyclobates
Gastropoda - Neritidae
Nerita atramentosa Reeve 1855
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. Correlated to Darragh's (1985) Molluscan Assemblage XVIII. STRATIGRAPHIC POSITION: From "younger" Ascot Formation, presumably lower in the stratigraphic succession, or encountered in shallow wells further down 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:63353
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2006-08-11 21:01:54 Last modified:2013-11-25 13:37:23
Access level:the public Released:2006-08-11 21:01:53
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]