Middle Westphalian flora from Alvarelhos strip: Pennsylvanian, Portugal
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Gondomaria discreta
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Neuropteridae
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Linopteris florini leaf
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Pteropsida
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Alethopteris cf. davreuxi axis
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1 specimen | ||||||
| spelled with current rank as Pecopteris (Alethopteris) | |||||||
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Polypodiopsida
- Hymenophyllales
- Hymenophyllaceae
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Eusphenopteris nummularia axis
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Polypodiopsida
- Equisetales
- Calamitaceae
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Asterophyllites sp.
Brongniart 1828
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Equisetopsida
- Sphenophyllales
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Sphenophyllum majus
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Medullosaceae
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Mariopteris nervosa leaf
Brongniart 1879
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Sphenopteridae
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Sphenopteris cf. dixoni
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1 specimen | ||||||
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Sphenopteris sp.
Sternberg 1825
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| see common names | |||||||
Geography
| Country: | Portugal | State/province: | Santo Tirso |
| Coordinates: | 41.3° North, 8.5° West (view map) | ||
| Paleocoordinates: | 7.1° South, 7.1° East | ||
| Basis of coordinate: | based on political unit |
Time
| Period: | Carboniferous | Epoch: | Pennsylvanian |
| 10 m.y. bin: | Carboniferous 4-5 | ||
| *Period: | Late/Upper Carboniferous | ||
| Key time interval: | Pennsylvanian | ||
| Age range of interval: | 323.20000 - 298.90000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Stratigraphy comments: Assemblage is either Westphalian B or C, although an early Westphalian D cannot be regarded as impossible. In view of the occurance of Linopteris florini, it may be considered unlikely that Westphalian B is represented. A Westphalian C is regarded as most probable. |
Lithology and environment
| Primary lithology: | gray mudstone |
| Lithology description: Remains collected from outcrip in cleaved light grey mudrock on which they are imprinted with a silvery sheen representing remnants of organic material. | |
Taphonomy
| Modes of preservation: | mold/impression |
| Fragmentation: | frequent |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taphonomic analysis |
Metadata
| Database number: | 27720 | ||
| Authorizer: | R. Gastaldo | Enterer: | J. Allen |
| Modifier: | J. Allen | ||
| Created: | 2002-12-28 13:42:44 | Last modified: | 2002-12-28 15:42:48 |
| Access level: | database members | Released: | 2002-12-28 13:42:44 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 7621. | R. H. Wagner and M. J. Lemos de Sousa. 1982. A middle Westphalian flora from the Alvarelhos strip near the Serra de Bougado, Santo Tirso, North Portugal. Communicações dos Serviços Geológicos de Portugal 68(2):257-266 [R. Gastaldo/J. Allen/J. Allen] |