Kalbarri (Darragh/Kendrick 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accumulated in inner neritic conditions (following Murray 1991), at water depths between about 10 and 30 m (based on unpublished observations of DW Haig for present-day assemblages along the Western Australian coast).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 T.A. Darragh, G.W. Kendrick in 2005; reposited in the WAM

• Repository: Museum Victoria, Melbourne (NMV) for some specimens

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 179825: authorized by Matthew Clapham, entered by Matthew Clapham on 02.07.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Glycymerididae
Tucetona lenticularis Tate 1886 clam
 Arcida - Limopsidae
Limopsis chapmani Singleton 1932 clam
 Pectinida - Pectinoidae
cf. Talochlamys eyrei Tate 1886 scallop
 Pectinida - Limidae
? Plicacesta sp. Vokes 1963 file clam
 Ostreida - Malleidae
Vulsella cf. laevigata Tate 1886 oyster
 Mytilida - Crenellidae
 Carditida - Carditidae
 Pholadida - Corbulidae
Caryocorbula pixidata Tate 1887 clam
 Cardiida - Chamidae
Chama sp. Linnaeus 1758 jewel box
 Cardiida - Veneridae
cf. Fossacallista tatei Cossmann 1920 venus clam
 Lucinida - Lucinidae
Epicodakia sp. Iredale 1930 clam
 Protobranchia - Sareptidae
Sarepta planiuscula Tate 1886 clam
Gastropoda
 Triphoroidea - Triforidae
Cerithiella sp. Verrill 1882 snail
 Neogastropoda -
Gracilispira cf. ligata Tate 1889 snail
 Neogastropoda - Fasciolariidae
Dennantia aldingensis Tate 1888 snail
? Brocchitas sp. Finlay 1927 snail
 Neogastropoda - Gemmoliva adelaidae
Gemmoliva cf. adelaidae Tate 1889 snail
 Neogastropoda - Mitridae
Mitridae "indet. B" Swainson 1831 mitre shell
 Neogastropoda - Marginellidae
Marginella "sp. A" Lamarck 1799 margin shell
 Neogastropoda - Volutidae
Lyria lamellatoplicata n. sp. Darragh and Kendrick 2008 volute
 Neogastropoda - Turbinellidae
Turbinellidae indet. Swainson 1840 snail
 Neogastropoda - Muricidae
Murexsul sp. Iredale 1915 murex snail
 Neogastropoda - Cochlespiridae
Cochlespira sp. Conrad 1865 snail
 Neogastropoda - Turridae
? Gemmula sp. Weinkauff 1875 turrid
 Neogastropoda - Horaiclavidae
Mauidrillia cf. aldingensis Powell 1944 snail
 Neogastropoda - Conidae
Conorbis sp. Swainson 1840 cone shell
 Vanikoroidea - Eulimidae
? Margineulima sp. Cossmann 1888 snail
 Tonnoidea - Cassidae
Galeodea sp. Link 1807 snail
 Sorbeoconcha - Siliquariidae
Tenagodus sp. Guettard 1770 snail
 Sorbeoconcha - Turritellidae
Zeacolpus bartoni n. sp. Darragh and Kendrick 2008 turret shell
 Sorbeoconcha - Cerithiidae
Cerithium wilya n. sp. Darragh and Kendrick 2008 cerith snail
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium (Fissidentalium) mawsoni Ludbrook 1956 tusk shell
Cephalopoda
 Nautilida - Nautilidae
Eutrephoceras sp. Hyatt 1894 nautiloid