PBDB Collection

USGS core 2A, sample D6707-CC (Eocene of the United States)

Where: Sheridan County, Wyoming (44.7° N, 106.2° W)

• Paleocoordinates: 51.3° N, 83.2° W (Wright 2013)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Wasatch Formation, Eocene (56.0 - 33.9 Ma)

• Arvada coal bed.

Environment/lithology: fluvial; coal

• From Pocknall and Nichols 1996 Figure 2: Anastomosed fluvial facies.

Size class: microfossils

Preservation: original sporopollenin

Collected by USGS, Denver, Colorado

Collection methods: core, chemical, hydrochloric, hydroflouric

• All slides are held in the Denver laboratory of the U.S. Geological Survey.

Primary reference: D. Pocknall. 1986. Palynological data from the Fort Union and Wasatch formations, Powder River basin, Wyoming and Montana. Open-File Report (86-117)more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 236730: authorized by Phillip Jardine, entered by Hannah Morck on 24.10.2024

Creative Commons license: CC0 (CC0)

Taxonomic list

• From Pocknall and Nichols 1996: 'Relative abundance (percentage) data were derived initially on the basis of counts of 200 specimens per sample. Dominance of assemblages from most samples by inaperturate pollen necessitated that these palynomorphs be excluded from our pollen sum in order to evaluate the abundance of the other species. Additional counts were then made until a total of 200 specimens exclusive of inaperturates had been counted for each sample. After completion of counting, slides were scanned and the presence of species not included in the count were recorded.’

•

•Abundance data have been entered here based on the initial counts (i.e. those that included the inaperturate pollen), with abundances from the additional counts included as comments for the relevant taxa. Taxa without abundance data were those recorded as present in the post-count scans.

Show authors, comments, and common names

unclassified
-	"Tricolporate B." indet., "Tricolpate/tricolporate" indet. "Tricolporate B." indet. A further 7 specimens were recorded in the additional count "Tricolpate/tricolporate" indet. A further 7 specimens were recorded in the additional count
Angiospermae
Gunnerales -	Tricolpites hians Tricolpites hians A further 6 specimens were recorded in the additional count
Pteridopsida
-	Reticuloidosporites pseudomurii Reticuloidosporites pseudomurii A further 1 specimens were recorded in the additional count
unclassified
-	"Tricolpate fine reticulum" indet., "Taxodiaceae/Cupressaceae" indet., "Tricolporate A." indet. "Tricolpate fine reticulum" indet. "Taxodiaceae/Cupressaceae" indet. "Tricolporate A." indet.
Angiospermae
Mesangiosperms - Arecaceae	Arecipites cf. tenuiexinous Arecipites cf. tenuiexinous palm
Fagales - Fagaceae	Quercus explanata Quercus explanata oak
unclassified
-	"Tricolpate B." indet. "Tricolpate B." indet.
Angiospermae
Malvales - Tiliaceae	Tilia tetraforaminipites Tilia tetraforaminipites linden A further 1 specimens were recorded in the additional count
unclassified
-	Ulmipollenites "krempii/tricostatus", Insulapollenites rugulatus Ulmipollenites "krempii/tricostatus" A further 1 specimens were recorded in the additional count Insulapollenites rugulatus A further 1 specimens were recorded in the additional count
Angiospermae
Cornales - Nyssaceae	Nyssa ingentipollinia Nyssa ingentipollinia tupelo A further 11 specimens were recorded in the additional count
unclassified
-	Polyatriopollenites vermontensis, "Bisaccate pollen" indet. Polyatriopollenites vermontensis A further 4 specimens were recorded in the additional count "Bisaccate pollen" indet. A further 31 specimens were recorded in the additional count
Angiospermae
Fagales - Juglandaceae	Momipites wyomingensis, Caryapollenites veripites Momipites wyomingensis Nichols and Ott 1978 A further 1 specimens were recorded in the additional count Caryapollenites veripites Wilson and Webster 1946 A further 5 specimens were recorded in the additional count
Fagales - Fagaceae	Cupuliferoipollenites spp. Cupuliferoipollenites spp. Potonié A further 2 specimens were recorded in the additional count
Fagales - Betulaceae	Alnipollenites verus Alnipollenites verus Potonie 1931 birch A further 1 specimens were recorded in the additional count
Proteales - Proteaceae	Triporopollenites spp. Triporopollenites spp. Pflug and Thomson 1953 A further 10 specimens were recorded in the additional count
Mesangiosperms - Liliaceae	Liliacidites spp. Liliacidites spp. Couper 1953 A further 1 specimens were recorded in the additional count
Magnoliopsida
-	"Tricolpites anguloluminosus" = Albertipollenites anguloluminosus "Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Archangelsky 1973 A further 3 specimens were recorded in the additional count
Polypodiopsida
- Polypodiaceae	Laevigatosporites spp. Laevigatosporites spp. Ibrahim 1933
Bryopsida
-	Stereisporites spp. Stereisporites spp. Pflug 1953 A further 6 specimens were recorded in the additional count