Myoponga Beach SH 23 (Cambrian of Australia)

Where: South Australia, Australia (35.4° S, 138.4° E: paleocoordinates 13.1° N, 160.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bemella communis small shelly zone, B Member (Sellick Hill Formation), Botomian (516.0 - 512.9 Ma)

• "A" is a lithofacies rather than a proper member, intertonguing with lower part of "B." Section 5

• bed-level stratigraphic resolution

Environment/lithology: limestone

• Heterolithic with thinly interbedded clacareous fine to medium grained sandstone, silstone and micaceous shale and rare thin bands of ribbon limestone and intraformational conglomerate. Abundant phosphate coated fossil fragments, peloids and ooids, and developed into irregular phosphate surfaces and stains occur in sandy interbeds.

Size classes: mesofossils, microfossils

Preservation: cast, original phosphate

Collection methods: bulk, chemical

Primary reference: D. I. Gravestock, E. M. Alexander, Y. E. Demidenko, N. V. Esakova, L. E. Holmer, J. B. Jago, T.-r. Lin, L. M. Melnikova, P. Yu Parkhaev, A. Yu Rozanov, G. T. Ushatinskaya, W.-l. Zang, E. A. Zhegallo and A. Yu Zhuravlev. 2001. The Cambrian biostratigraphy of the Stansbury Basin, South Australia. Russian Academy of Sciences, Transactions of the Palaeontological Institute 282:1-344 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 97701: authorized by Pete Wagner, entered by Pete Wagner on 24.08.2010, edited by Hallie Street

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Coeloscleritophora
 Chancelloriida - Chancelloriidae
Allonnia ex gr. tripodophora Doré and Reid 1965
Chancelloria sp. Walcott 1920
Chancelloria racemifundis Bengston et al. 1990
Eremactis mawsoni Bengtson 1990
 Sachitida -
Aculifera
  - Halkieriidae
"Thambetolepis delicata" = Sinosachites
"Thambetolepis delicata" = Sinosachites
 Sachitida -
"Halkieria parva" = Australohalkieria parva
"Halkieria parva" = Australohalkieria parva Bengtson et al. 1990
Watsonella crosbyi
  -
Watsonella crosbyi Grabau 1900
Helcionelloida
 Helcionellida - Helcionellidae
Obtusoconus brevis Esakova and Zhegallo 1996
Brachiopoda
 Tommotiida - Lapworthellidae
Lapworthella fasciculata Bengtson et al. 1990
Hyolitha
 Orthothecida -
"Cupittheca sp. 1" = Cupitheca
"Cupittheca sp. 1" = Cupitheca Duan 1984
 Orthothecida - Circothecidae
Conotheca australiensis Bengtson et al. 1990
 Hyolithida - Nelegerocornidae
Microcornus sp. Mambetov 1972