Section C (Cesana Brianza), 39.3 m: Early/Lower Aptian, Italy
collected by Landra & Cecca
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Macroscaphitidae
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Macroscaphites (Macroscaphites) sp.
Meek 1876
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1 specimen | ||||||
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Cephalopoda
- Ammonitida
- Ptychoceratidae
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Ptychoceras sp.
d'Orbigny 1842
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1 specimen | ||||||
| see common names | |||||||
Geography
| Country: | Italy |
| Coordinates: | 45.7° North, 9.3° East (view map) |
| Paleocoordinates: | 31.0° North, 18.4° East |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Stage: | Barremian | ||
| Key time interval: | Early/Lower Aptian | ||
| Age range of interval: | 121.40000 - 119.50000 m.y. ago |
Stratigraphy
| Local section: | Cesana Brianza | Local bed: | 39.3 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From unnamed lithostratigraphic unit, referred to as "transitional facies", that overlies the Maiolica Fm (Barremian), and is overlain by the Marne di Bruntino Fm (Late Aptian). AGE: Early Aptian, on the basis of ammonoid, calcareous nannofosil and planktonic foraminiferal biostratigraphy, and magnetic polarity. STRATIGRAPHIC POSITION: From near middle of section, at 39.3 m above base; from the Livello Selli equivalenti. | |||||
Lithology and environment
| Primary lithology: | black lithified "shale" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Black shale. LITHIFICATION: Lithified, on the basis of figured specimens and taphonomic description. | |
| Environment: | offshore indet. |
| Geology comments: ENVIRONMENT: Deep water carbonate setting; low oxygen. | |
Taphonomy
| Modes of preservation: | cast,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Landra & Cecca |
| Collection method comments: COLLECTOR: G. Landra & F. Cecca. REPOSITORY: Museo di Paleontologia, University of Milan (MPUM). | |
| Taxonomic list comments:COVERAGE: Exhaustive for ammonoidea, but not listing other taxa, which may include foraminfiera and nannoplankton. Other macrofauna may be depauperate due to anoxia. NOMENCLATURE: Authoritative publication, with modern nomenclature (following Wright, 1996), but often not species resolution identification because of preservation. | |
Metadata
| Database number: | 82834 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2008-08-02 12:37:40 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2008-08-02 12:37:40 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 27848. | G. Landra, F. Cecca, and Z. Vasicek. 2000. Early Aptian ammonites from the top of the Maiolica and the anoxic "Selli level" (Lombardy, Southern Alps). Bollettino della Societa Paleontologica Italiana 39(1):29-45 [A. Hendy/A. Hendy] |