Section C (Cesana Brianza), 24.5 m: Early/Lower Aptian, Italy
collected by Landra & Cecca
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Cephalopoda
- Ammonoidea
|
|||||||
|
Ammonoidea indet.
Zittel 1884
|
3 specimens | ||||||
|
Cephalopoda
- Macroscaphitidae
|
|||||||
|
Macroscaphites (Costidiscus) sp.
(Uhlig 1883)
|
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: | 24.5 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 "Livello Selli equivalenti and 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 24.5 m above base. | |||||
Lithology and environment
| Primary lithology: | lithified calcareous lime mudstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Pelagic calcilutite. 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: | 82827 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2008-08-02 12:28:49 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2008-08-02 12:28:49 |
| 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] |