Middle Holocene, Guildford, Western Australia (Holocene of Australia)

Where: Western Australia, Australia (31.9° S, 116.0° E: paleocoordinates 31.9° S, 116.0° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Holocene (0.0 - 0.0 Ma)

• AGE: Middle Holocene; a radiocarbon age of 6660 +/- 120 yr BP (shell carbonate) indicate that the fauna lived during the Flandrian transgression. STRATIGRAPHIC POSITION: Stratigraphic relationship of the elements of the spoil-pile was not observed direction, but apparently the modern channel bed is composed of coarse sand. Dredging removed from 0.3-2.1 m of substrate, resulting in a channel level about 4.4-5.6 m below sea level. Shell-bearing siltstone came from low in the cut beneath the channel sand and, from its relative scarcity in the spoil, was either of no great thickness or was only slightly or intermittently penetrated by the dredge.

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; unlithified, shelly/skeletal, gray, sandy, calcareous siltstone

• ENVIRONMENT: Considerable environmental data provided in text. Generally estaurine fauna, but with lowered river discharge than at the present time, accumulated during a relative dry interval.
• SPECIFIC LITHOLOGY: Soft, grey, calcareous, sandy siltstone, mostly shell bearing. Many shells were free from sediment. LITHIFICATION: Unlithified, as described as "soft", with shells free of sediment.

Size class: macrofossils

Preservation: original aragonite, original calcite

Collection methods: salvage, sieve,

• COLLECTORS: H.E. Merrifield (1969) and G.W. Kendrick (1970-71). REPOSITORY: Western Australian Museum (WAM)

Primary reference: G. W. Kendrick. 1977. Middle Holocene marine molluscs near Guildford, Western Australia, and evidence for climate change. Journal of the Royal Society of Western Australia 59(4):97-104 [A. Miller/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 63350: authorized by Austin Hendy, entered by Austin Hendy on 11.08.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• COMPLETENESS: Exhaustive for gastropoda and bivalvia. May contain some modern forms, although author has tried to filter these from his list. NOMENCLATURE: Not an authoritative publication but author uses relatively modern nomenclature and identified to subgeneric and species resolution.
unclassified
  -
Gastropoda
 Trochoidea - Trochidae
Monilea callifera Lamarck 1822 top snail
 Cerithioidea - Diastomatidae
Obtortio (Alabina) sp. Hedley 1899 snail
 Epitonioidea - Epitoniidae
 Neogastropoda - Nassariidae
 Sorbeoconcha - Vitrinellidae
 Sorbeoconcha - Naticidae
Polinices (Conuber) conicus Lamarck 1822 moon snail
 Opisthobranchia -
 Opisthobranchia - Retusidae
Retusa "sp. A" Brown 1827 snail
Retusa "sp. B" Brown 1827 snail
 Heterostropha - Pyramidellidae
"Turbonilla (Chemnitzia) mariae" = Chemnitzia, "Turbonilla (Chemnitzia) sp." = Chemnitzia, Agatha simplex
"Turbonilla (Chemnitzia) mariae" = Chemnitzia snail
"Turbonilla (Chemnitzia) sp." = Chemnitzia d'Orbigny 1840 snail
Bivalvia
 Hiatellida - Hiatellidae
Hiatella australis Lamarck 1818 clam
 Pholadida - Pholadidae
 Cardiida - Veneridae
Irus irus Linnaeus 1767 venus clam
Dosinia sculpta Hanley 1845 venus clam
Listed as Dosinia (Pectunculus) sculpta; Pectunculus not entered to avoid confusion with homonyms in Glycymerididae
Circe sulcata venus clam
 Cardiida - Chamidae
Chama ruderalis Lamarck 1819 jewel box
 Cardiida - Cardiidae
 Cardiida - Tellinidae
Tellina (Pinguitellina) sp. Linnaeus 1758 tellin clam
Tellina sp. Linnaeus 1758 tellin clam
Tellina (Tellinangulus) sp. Linnaeus 1758 tellin clam
 Cardiida - Psammobiidae
 Mytilida - Crenellidae
Musculus cf. nanulus Thiele 1930 mussel
 Ostreida - Ostreidae
Ostrea angasi Sowerby 1846 oyster
 Pectinida - Pectinoidae