Bagdad Member, Herschell Limestone - Rottnest Island: Holocene, Australia
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Tubothalamea
- Miliolida
- Soritidae
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Marginopora cf. vertebralis
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Bivalvia
- Mytilida
- Mytilidae
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Brachidontes ustulatus
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Bivalvia
- Cardiida
- Cardiidae
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Fragum erugatum
(Tate 1889)
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Bivalvia
- Cardiida
- Tellinidae
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Tellina perna
Spengler 1798
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recombined as Tonganaella perna | |||||||
Bivalvia
- Cardiida
- Veneridae
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Katelysia scalarina
Lamarck 1818
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Gastropoda
- Littorinidae
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Bembicium auratum
Quoy 1834
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Gastropoda
- Neogastropoda
- Nassariidae
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Nassarius pyrrhus
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Gastropoda
- Neogastropoda
- Buccinidae
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Cominella tasmanica
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Gastropoda
- Batillariidae
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Batillaria estuarina
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Gastropoda
- Patellida
- Lottiidae
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Patelloida insignis
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Notoacmaea conoidea
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original and current combination Notoacmea | |||||||
see common names |
Geography
Country: | Australia | State/province: | Western Australia |
Coordinates: | 32.0° South, 115.5° East (view map) | ||
Paleocoordinates: | 32.0° South, 115.5° East | ||
Basis of coordinate: | estimated from map | ||
Geographic resolution: | outcrop |
Time
Period: | Quaternary | Epoch: | Holocene |
Key time interval: | Holocene | ||
Age range of interval: | 0.01170 - 0.00000 m.y. ago |
Stratigraphy
Formation: | Herschell Limestone | Member: | Bagdad | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: LITHOSTRATIGRAPHY: The Herschell Limestone of Playford (1977) is subdivided here (Playford, 1988) into two members: the lower Vincent Member and the upper Bagdad Member. STRATIGRAPHIC RELATIONS: Overlying the Vincent Member of the Herschell Limestone, which further overlies and abuts the Tamala Limestone, and is overlain by superficial Holocene deposits. THICKNESS: Thickness at type section is 0.6 metres. AGE: Dated as being around 2,200 to 3,100 years old. STRATIGRAPHIC POSITION: Fossils from throught the unit (informally divided into four lithologic units, all containing macrofossils). |
Lithology and environment
Primary lithology: | medium,shelly/skeletal poorly lithified sandy,calcareous "mixed carbonate-siliciclastic" |
Secondary lithology: | coarse,very coarse,shelly/skeletal poorly lithified calcareous sandstone |
Includes fossils? | Y |
Includes fossils? | Y |
Lithology description: SPECIFIC LITHOLOGY: Weakly lithified medium-coarse grained coquinite and interbedded weakly lithified coarse-to very coarse grained calcarenite. LITHIFICATION: Poorly lithified as text states the unit is "weakly lithified". | |
Environment: | foreshore |
Geology comments: ENVIRONMENT: Above wave base, probably in a beach deposit in the upper intertidal zone. |
Taphonomy
Modes of preservation: | body,original aragonite,original calcite |
Size of fossils: | macrofossils |
Abundance in sediment: | abundant |
Articulated whole bodies: | none |
Disassociated major elements: | all |
Temporal resolution: | time-averaged |
Spatial resolution: | parautochthonous |
Collection methods and comments
Collection methods: | field collection,survey of museum collection,observed (not collected) |
Reason for describing collection: | taxonomic analysis |
Collection method comments: COLLECTOR: Collection a composite of taxa listed from various publications and personal comments by G.W. Kendrick. REPOSITORY: No repository stated, though presumably reference material exists at the Western Australian Museum (WAM). | |
Taxonomic list comments:COMPLETENESS: Not exhaustive, only limited to common and characteristic taxa. 99 species are recorded from this unit. NOMENCLATURE: Not an authoritative publication, and many names lack species-level assignments. |
Metadata
Database number: | 63358 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 2006-08-11 23:19:46 | Last modified: | 2013-11-25 13:37:23 |
Access level: | the public | Released: | 2006-08-11 23:19:46 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
18221. | P. E. Playford. 1988. Guidebook to the geology of Rottnest Island. Geological Society of Australia Western Australia Division Excursion Guidebook 2 [A. Miller/A. Hendy] |