Balai Lontano, meter 17: Burdigalian - Langhian, Italy
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Oichnus simplex
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Echinoidea
- Clypeasteroida
- Clypeasteridae
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Clypeaster marginatus
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Echinoidea
- Clypeasteroida
- Fibulariidae
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Echinocyamus sp.
van Phelsum 1774
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Echinoidea
- Spatangoida
- Hemiasteridae
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Holanthus sp.
Lambert and Thiéry 1924
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| Subordinate | ||||||||||
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Echinoidea
- Spatangoida
- Schizasteridae
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Opissaster sp.
Pomel 1883
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| Subordinate | ||||||||||
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Ova sp.
Gray 1825
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| spelled with current rank as Schizaster (Ova) | ||||||||||
| Dominant | ||||||||||
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Echinoidea
- Spatangoida
- Brissidae
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Metalia sp.
Gray 1855
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| Sporadic | ||||||||||
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Brissopsis sp.
Agassiz 1840
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| Dominant | ||||||||||
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Echinoidea
- Spatangoida
- Loveniidae
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Hemipatagus sp.
Desor 1858
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| Sporadic | ||||||||||
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Echinoidea
- Camarodonta
- Trigonocidaridae
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Trigonocidaridae indet.
Mortensen 1903
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| "small trigonocidarids" | ||||||||||
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unclassified
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Rhodophyta indet.
Wettstein 1922
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| "rhodoliths" | ||||||||||
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Thalassinoides sp.
Ehrenberg 1944
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| "Thalassinoides-like burrows up to 2 cm in diameter which can extend more than 1 m horizontally" | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Italy | State/province: | Sardinia |
| Coordinates: | 40.8° North, 8.4° East (view map) | ||
| Paleocoordinates: | 43.0° North, 4.2° East | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Burdigalian - Langhian | ||
| Age range of interval: | 20.44000 - 13.82000 m.y. ago |
Stratigraphy
| Formation: | Borutta | ||||
| Local section: | Balai Lontano | Local bed: | 17 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "The Borutta Formation, which is assigned to the Late Burdigalian-Langhian based on calcareous nannoplankton (biozones NN4/NN5 of Martini, 1971) by Mazzei and Oggiano (1990) and Francolini (1994) and planktonic foraminifera (biozone N7 of Blow, 1969) by Bossio et al. (2006)." | |||||
Lithology and environment
| Primary lithology: | fine sandstone | ||
| Secondary lithology: | rudstone | ||
| Lithology description: Formation composed of "calcareous siltstones, fine-grained sandstones and marls." "The studied marine sedimentary succession of the Borutta Formation is composed mainly of fine-grained sandstones with intercalated dm- to m-thick rhodolith beds consisting of rudstones to floatstones. Lateral variations of thickness, lithology, and facies are common. Echinoid remains occur throughout the sedimentary sequence. The fine grained sandstones are highly fossiliferous and are dominated by spatangoid echinoids and the minute clypeasteroid Echinocyamus." | |||
| Environment: | transition zone/lower shoreface | Tectonic setting: | pull-apart basin |
| Geology comments: "deeper shelf facies." "mainly located in the NNW-SSE-oriented Sardinian Basin (“Fossa sarda” Auctorum), a tectonic trough that extends from the Gulf of Sassari in the northwest to Cagliari in the south and comprises a number of minor sub-basins." | |||
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils,mesofossils |
| Spatial orientation: | random |
| Fragmentation: | frequent |
| Bioerosion: | none |
| Encrustation: | none |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: "approximately 250 m2 extensive bedding surface of a 20-cm-thick bed at meter 17 of the section" | |
| Taxonomic list comments:Sampling focus is on spatangoid and other echinoids. | |
Metadata
| Database number: | 187430 | ||
| Authorizer: | P. Novack-Gottshall | Enterer: | P. Novack-Gottshall |
| Modifier: | P. Novack-Gottshall | Research group: | marine invertebrate |
| Subset of collection #: | 187431 | ||
| Created: | 2017-07-27 17:36:39 | Last modified: | 2017-07-27 18:20:48 |
| Access level: | the public | Released: | 2017-07-27 17:36:39 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 62892. | A. Mancosu and J. H. Nebelsick. 2017. Palaeoecology and taphonomy of spatangoid-dominated echinoid assemblages: A case study from the Early-Middle Miocene of Sardinia, Italy. Palaeogeography, Palaeoclimatology, Palaeoecology 466:334-352 [P. Novack-Gottshall/P. Novack-Gottshall/M. Uhen] |