PBDB Collection

USGS core 2A, sample D6707-Z (Paleocene of the United States)

Where: Sheridan County, Wyoming (44.7° N, 106.2° W: paleocoordinates 50.5° N, 84.4° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Tongue River Member (Fort Union Formation), Paleocene (66.0 - 56.0 Ma)

• Smith coal bed.

Environment/lithology: fluvial; shale

• 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 236779: authorized by Phillip Jardine, entered by Hannah Morck on 30.10.2024

Creative Commons license: CC BY (attribution)

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 fine reticulum" indet. "Tricolporate B." indet. A further 10 specimens were recorded in the additional count "Tricolpate fine reticulum" indet. A further 8 specimens were recorded in the additional count
Angiospermae
Fagales - Fagaceae	Quercus explanata Quercus explanata oak A further 6 specimens were recorded in the additional count
unclassified
-	"Tricolpate B." indet., "Taxodiaceae/Cupressaceae" indet. "Tricolpate B." indet. A further 1 specimens were recorded in the additional count "Taxodiaceae/Cupressaceae" indet.
Angiospermae
Buxales - Buxaceae	Erdtmanipollis pachysandroides Erdtmanipollis pachysandroides boxwood
Mesangiosperms - Arecaceae	Arecipites cf. tenuiexinous Arecipites cf. tenuiexinous palm
Pteridopsida
-	Reticuloidosporites pseudomurii Reticuloidosporites pseudomurii A further 1 specimens were recorded in the additional count
unclassified
-	Polyatriopollenites vermontensis, Insulapollenites rugulatus, Ulmipollenites "krempii/tricostatus" Polyatriopollenites vermontensis A further 1 specimens were recorded in the additional count Insulapollenites rugulatus A further 1 specimens were recorded in the additional count Ulmipollenites "krempii/tricostatus" A further 6 specimens were recorded in the additional count
Angiospermae
Gunnerales -	Tricolpites hians Tricolpites hians A further 3 specimens were recorded in the additional count
unclassified
-	"Bisaccate pollen" indet. "Bisaccate pollen" indet. A further 3 specimens were recorded in the additional count
Angiospermae
Cornales - Nyssaceae	Nyssa ingentipollinia Nyssa ingentipollinia tupelo A further 12 specimens were recorded in the additional count
Polypodiopsida
- Osmundaceae	Baculatisporites sp. Baculatisporites sp. Thomson and Pflug 1953
- Polypodiaceae	Laevigatosporites spp. Laevigatosporites spp. Ibrahim 1933 A further 1 specimens were recorded in the additional count
Cycadopites
-	Cycadopites spp. Cycadopites spp. Wodehouse 1933
Equisetopsida
Pinidae - Pinidae	"Corollina sp." = Classopollis "Corollina sp." = Classopollis Pflug 1953
Magnoliopsida
-	"Tricolpites anguloluminosus" = Albertipollenites anguloluminosus "Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Archangelsky 1973 A further 5 specimens were recorded in the additional count
Angiospermae
Fagales - Fagaceae	Cupuliferoipollenites spp. Cupuliferoipollenites spp. Potonié A further 2 specimens were recorded in the additional count
Fagales - Juglandaceae	Caryapollenites inelegans, Caryapollenites veripites, Caryapollenites imparalis, Momipites wyomingensis, Momipites ventifluminis Caryapollenites inelegans Nichols and Ott 1978 Caryapollenites veripites Wilson and Webster 1946 A further 10 specimens were recorded in the additional count Caryapollenites imparalis Nichols and Ott 1978 A further 4 specimens were recorded in the additional count Momipites wyomingensis Nichols and Ott 1978 A further 6 specimens were recorded in the additional count Momipites ventifluminis Nichols and Ott 1978
Fagales - Betulaceae	Alnipollenites verus Alnipollenites verus Potonie 1931 birch A further 2 specimens were recorded in the additional count
Proteales - Proteaceae	Triporopollenites spp. Triporopollenites spp. Pflug and Thomson 1953 A further 19 specimens were recorded in the additional count