Point Allen Fm - Kangaroo Island (Pleistocene of Australia)

Where: South Australia, Australia (36.0° S, 137.2° E: paleocoordinates 37.4° S, 136.8° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Point Allen Formation, Early/Lower Pleistocene (2.6 - 0.8 Ma)

• STRATIGRAPHIC RELATIONS: From Point Allen Fm, lateral equivalent to the Burham Limestone. Of limited extent in distribution and deposited on irregular surfaces. The Point Allen Fm and Burnham Limestone rest unconformably on Hallett Cove Sandstone and its equivalents. THICKNESS: From a few centimetres to two metres. AGE: Early Pleistocene based on biostratigraphy and the age of bounding units. STRATIGRAPHIC POSITION: From throughout the formation.

• formation-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, shelly/skeletal, sandy limestone

• ENVIRONMENT: Presumably very shallow water. Many taxa are common to rocky headlands on an exposed coast.
• SPECIFIC LITHOLOGY: Difficult to determine lithology. Text states Point Allen Fm to be a fossiliferous limestone....interbedded with cross-bedded aeolianites at its base......soft carbonate rock....more porus, less leach and much original shell material is preserved. LITHIFICATION: Poorly lithified based on above comments and figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression, original aragonite, original calcite

Collection methods: quarrying,

• COLLECTORS: The list is a composite made by many collectors, mainly Chapman (1915), Wopfner (1964), Milnes and Cooper (1965), Milnes, Cooper anmd Ludbrook (1981, 1982). REPOSITORY: National Museum of Victoria (NMV) and Geological Survey of South Australia (GSSA).

Primary reference: N.H. Ludbrook. 1983. Molluscan faunas of the Early Pleistocene Point Allen Formation and Burnham limestone, South Australia. Transactions of the Royal Society of South Australia 107(1):37-49 [A. Miller/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 63379: authorized by Austin Hendy, entered by Austin Hendy on 12.08.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• COMPLETENESS: Exhaustive for bivalvia and gastropoda. Other groups not mentioned as present. NOMENCLATURE: An authoritative publication, using modern nomenclature and subgeneric classification.
unclassified
  -
Foraminifera
 Rotalioidea - Elphidiidae
 Lituolida - Lituolidae
 Biokovinacea - Charentiidae
Tubothalamea
 Miliolida - Soritidae
 Miliolida - Hauerinidae
Foraminifera
 Rotaliacea - Rotaliidae
Gastropoda
 Trochoidea - Phasianellidae
Phasianella australis Lamarck 1822 snail
 Trochoidea - Turbinidae
 Trochoidea - Trochidae
 Lepetellida - Fissurellidae
 Lepetellida - Haliotidae
 Epitonioidea - Janthinidae
Hartungia dennanti snail
Subspecies: H. dennanti chavani
 Cerithioidea - Diastomatidae
 Cerithioidea - Turritellidae
Gazameda iredalei Finlay 1927 turret shell
 Cerithioidea - Dialidae
Diala lauta Adams 1862 snail
 Cerithioidea - Potamididae
"Batillaria (Zeacumantus) diemenensis" = Zeacumantus
"Batillaria (Zeacumantus) diemenensis" = Zeacumantus horn snail
 Sorbeoconcha - Campanilidae
Campanile symbolicum Iredale 1917 snail
 Neogastropoda - Ancillariidae
 Neogastropoda - Buccinidae
 Neogastropoda - Nassariidae
"Niotha pyrrhus" = Nassarius (Niotha)
"Niotha pyrrhus" = Nassarius (Niotha) snail
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Volutidae
 Neogastropoda - Cancellariidae
 Sorbeoconcha - Ranellidae
 Sorbeoconcha - Littorinidae
Bembicium nanum Lamarck 1822 periwinkle
 Sorbeoconcha - Naticidae
Polinices (Conuber) conicus Lamarck 1822 moon snail
 Sorbeoconcha - Hipponicidae
Hipponix (Sabia) conicus Schumacher 1817 hoof shell
 Patellogastropoda - Patellidae
Patella (Scutellastra) peronii Blainville 1825 limpet
 Patellida - Lottiidae
 Neritoidea - Neritidae
 Basommatophora - Siphonariidae
Bivalvia
 Arcida - Glycymerididae
Glycymeris (Veletuceta) pseudaustralis, "Glycymeris (Tucetona) convexa" = Tucetona
"Glycymeris (Tucetona) convexa" = Tucetona clam
 Pectinida - Pectinoidae
"Chlamys (Chlamys) asperrima" = Mimachlamys asperrima
"Chlamys (Chlamys) asperrima" = Mimachlamys asperrima Lamarck 1819 scallop
Subspecies: C. (C.) asperrima asperrima
 Ostreida - Ostreidae
Ostrea cf. angasi Sowerby 1846 oyster
 Lucinida - Lucinidae
"Linga (Bellucina) praetermissa n. sp." = Cardiolucina praetermissa Ludbrook 1983 clam
Miltha hamptonensis Ludbrook 1969 clam
Anodontia sphericula Basedow 1902 clam
? Callucina lacteola Tate 1897 clam
 Cardiida - Veneridae
Katelysia scalarina Lamarck 1818 venus clam
 Cardiida - Mactridae
 Cardiida - Tellinidae
Tellina sp. Linnaeus 1758 tellin clam
 Carditida - Carditidae
Scaphopoda
 Dentaliida - Dentaliidae