Kalbarri (Barton collection) (Eocene to of Australia)

Where: Western Australia, Australia (27.8° S, 114.3° E: paleocoordinates 48.7° S, 99.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bartonian to Bartonian (41.3 - 33.9 Ma)

• Collectively, the planktonic foraminifers indicate that the newly discovered site belongs within the P13 to P16 zonal range (40.5 – 34.0 Ma BKSA95).

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified, cherty/siliceous mudstone and poorly lithified, cherty/siliceous sandstone

• Because of the abundance of robust diverse miliolid foraminifers and the low planktonic percentage (about 10%), the new unit probably accumulated in inner neritic conditions (following Murray 1991), at water depths between about 10 and 30 m (based on unpublished observations of DW Haig for present-day assemblages along the Western Australian coast). Darragh & Kendrick inferred a deeper water, perhaps middle shelf environment of deposition, although the rolled and broken nature of all the fossils and the coarse sediment in which they are found may indicate that the material had been washed into shallower water.
• Iron-stained siliceous argillites with scattered large fragments of silicified bryozoans as well as large (up to about 30 cm) intact siliceous sponges. A relatively clean sponge spicule dominated arenite that includes silicified calcareous skeletal grains (including abundant foraminifers, and common gastropods and bryozoan fragments) is also present.

Size class: macrofossils

Preservation: original silica, replaced with silica

Collected by David Barton in 2000-2001; reposited in the WAM

• Acquired over the period 2000-2001 and presented to the Western Australian Museum in 2005.

Primary reference: T. A. Darragh and G. W. Kendrick. 2008. Silicified Eocene molluscs from the Lower Murchison district, southern Carnarvon Basin, Western Australia. Records of the Western Australian Museum 24:217-246 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 179823: authorized by Matthew Clapham, entered by Matthew Clapham on 02.07.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pholadida - Corbulidae
Caryocorbula pixidata Tate 1887 clam
 Lucinida - Lucinidae
Epicodakia sp. Iredale 1930 clam
Gastropoda
 Triphoroidea - Triforidae
Cerithiella sp. Verrill 1882 snail
 Triphoroidea - Cerithiopsidae
Notoseila sp. Finlay 1926 snail
 Neogastropoda - Mitridae
Mitridae "indet. A" Swainson 1831 mitre shell
 Neogastropoda - Marginellidae
Marginella "sp. B" Lamarck 1799 margin shell
 Neogastropoda - Volutidae
Notovoluta capitonica Darragh 1989 volute
Notopeplum protorhysum Tate 1889 volute
Lyria lamellatoplicata Darragh and Kendrick 2008 volute
 Neogastropoda - Conidae
? Conus sp. Linnaeus 1758 cone shell
 Naticoidea - Naticidae
Euspirocrommium sp. Sacco 1890 moon snail
 Xenophoroidea - Xenophoridae
Xenophora cf. tatei Harris 1897 carrier shell
 Sorbeoconcha - Turritellidae
Zeacolpus bartoni Darragh and Kendrick 2008 turret shell
 Sorbeoconcha - Cerithiidae
Cerithium wilya Darragh and Kendrick 2008 cerith snail
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium (Fissidentalium) mawsoni Ludbrook 1956 tusk shell
Cephalopoda
 Nautilida - Nautilidae
Eutrephoceras sp. Hyatt 1894 nautiloid