Sample 25, Puerto Rican Lignites B: Oligocene - Late/Upper Oligocene, Puerto Rico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Plantae indet. microspore
Haeckel 1866
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15.5 %-specimens | ||||||
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Faramea sp. microspore
|
1.5 %-specimens | ||||||
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informal Fern indet. microspore
|
4 %-specimens | ||||||
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Polypodiopsida
- Polypodiaceae
|
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Polypodiaceae indet. microspore
Presl and Presl 1822
|
5 %-specimens | ||||||
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Polypodiopsida
- Cyatheales
- Cyatheaceae
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Cyathea sp. microspore
Smith 1793
|
1.5 %-specimens | ||||||
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Angiospermae
- Arecaceae
|
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Palmae indet. microspore
de Jussieu
|
7 %-specimens | ||||||
| synonym of Arecaceae | |||||||
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Angiospermae
- Ericales
- Sapotaceae
|
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Chrysophyllum sp. microspore
Linnaeus 1753
|
.5 %-specimens | ||||||
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Angiospermae
- Fagales
- Juglandaceae
|
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Engelhardia sp. microspore
Blume 1825
|
2.5 %-specimens | ||||||
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Angiospermae
- Malpighiales
- Rhizophoraceae
|
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Rhizophora sp. microspore
Linnaeus 1753
|
61.5 %-specimens | ||||||
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Angiospermae
- Malpighiales
- Euphorbiaceae
|
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Alchornea sp. microspore
Swartz 1788
|
1 %-specimens | ||||||
| see common names | |||||||
Geography
| Country: | Puerto Rico |
| Coordinates: | 18.3° North, 66.9° West (view map) |
| Paleocoordinates: | 17.4° North, 66.0° West |
| Basis of coordinate: | based on political unit |
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| 10 m.y. bin: | Cenozoic 4 | ||
| *Period: | Middle Tertiary | *Epoch: | Middle Oligocene - Late/Upper Oligocene |
| Key time interval: | Oligocene - Late/Upper Oligocene | ||
| Age range of interval: | 33.90000 - 23.03000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Rio Guatemala | Formation: | San Sebastian | Local bed: | 4 |
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: 6 inch coal and lignitic clay. | |||||
Lithology and environment
| Primary lithology: | carbonaceous claystone |
| Secondary lithology: | lignite |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: Clay is lignitic and there is coal present. | |
Taphonomy
| Modes of preservation: | body,original sporopollenin |
| Size of fossils: | microfossils |
| Spatial orientation: | random |
| Preservation of anatomical detail: | excellent |
Collection methods and comments
| Collection excludes: | some microfossils,species names |
| Collection methods: | bulk,chemical,mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 32290 | ||
| Authorizer: | E. Kowalski | Enterer: | E. Kowalski |
| Modifier: | E. Kowalski | Research group: | paleobotany |
| Created: | 2003-06-17 17:10:34 | Last modified: | 2003-06-17 20:16:23 |
| Access level: | the public | Released: | 2003-06-17 17:10:34 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 8693. | A. Graham and D. L. Jarzen. 1969. Studies in neotropical paleobotany. I. The Oligocene communities of Puerto Rico. Annals of the Missouri Botanical Garden 56:308-357 [E. Kowalski/E. Kowalski/E. Kowalski] |