Sample 48, Puerto Rican Lignites C: Oligocene - Late Oligocene, Puerto Rico

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
19 %-specimens
Lycopodiopsida - Selaginellales - Selaginellaceae
Selaginella sp. microspore Beauvois 1804
<.5 %-specimens
Lycopodiopsida - Lycopodiales - Lycopodiaceae
<.5 %-specimens
unclassified
Bernoullia sp. microspore Heer 1876
2.5 %-specimens
Brunellia sp. microspore
1.5 %-specimens
Catostemma sp. microspore
<.5 %-specimens
Dendropanax sp. microspore
<.5 %-specimens
Polypodiopsida - Polypodiaceae
8 %-specimens
unclassified
5 %-specimens
Polypodiopsida - Cyatheales - Cyatheaceae
Hemitelia sp. microspore Brown 1810
<.5 %-specimens
Angiospermae - Malpighiales - Salicaceae
.5 %-specimens
unclassified
Tetrorchidium sp. microspore
1 %-specimens
Angiospermae - Malpighiales - Euphorbiaceae
.5 %-specimens
Angiospermae - Fagales - Juglandaceae
41.5 %-specimens
Angiospermae - Myrtales - Myrtaceae
.5 %-specimens
unclassified
Guarea sp. microspore
.5 %-specimens
Hauya sp. microspore
<.5 %-specimens
Angiospermae - Ericales - Tetrameristaceae
<.5 %-specimens
Angiospermae - Cornales - Nyssaceae
4.5 %-specimens
Angiospermae - Saxifragales - Hamamelidaceae
2 %-specimens
Angiospermae - Arecaceae
Palmae indet. microspore de Jussieu
12 %-specimens
see common names

Geography
Country:Puerto Rico
Coordinates: 18.4° North, 66.2° West (view map)
Paleocoordinates:19.3° North, 60.4° West (Wright 2013)
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 Oligocene
Age range of interval: 33.9 - 23.04 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Rio Guatemala Formation:San Sebastian
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: claystone
Includes fossils?Y
Lithology description: Clay is lignitic.
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:32297
Authorizer:E. Kowalski Enterer:E. Kowalski
Modifier:E. Kowalski Research group:paleobotany
Created:2003-06-19 13:09:07 Last modified:2025-02-22 15:12:02
Access level:the public Released:2003-06-19 13:09:07
Creative Commons license:CC0
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]