PBDB Collection

USGS core 2A, sample D6707-I (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)

• Anderson coal bed.

Environment/lithology: fluvial; coal

• From Pocknall and Nichols 1996 Figure 2: Anastomosed fluvial to meandering 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 more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 236797: authorized by Phillip Jardine, entered by Hannah Morck on 31.10.2024

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 A." indet., "Tricolpate/tricolporate" indet., "Taxodiaceae/Cupressaceae" indet. "Tricolporate A." indet. A further 8 specimens were recorded in the additional count "Tricolpate/tricolporate" indet. A further 3 specimens were recorded in the additional count "Taxodiaceae/Cupressaceae" indet.
Angiospermae
Malvales - Tiliaceae	Tilia tetraforaminipites Tilia tetraforaminipites linden
Fagales - Fagaceae	Quercus explanata Quercus explanata oak A further 1 specimens were recorded in the additional count
unclassified
-	Insulapollenites rugulatus, Ulmipollenites "krempii/tricostatus", "Bisaccate pollen" indet., Polyatriopollenites vermontensis Insulapollenites rugulatus A further 1 specimens were recorded in the additional count Ulmipollenites "krempii/tricostatus" A further 2 specimens were recorded in the additional count "Bisaccate pollen" indet. A further 17 specimens were recorded in the additional count Polyatriopollenites vermontensis A further 2 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
Gunnerales -	Tricolpites hians Tricolpites hians A further 12 specimens were recorded in the additional count
unclassified
-	"Tricolpate fine reticulum" indet. "Tricolpate fine reticulum" indet. A further 16 specimens were recorded in the additional count
Pteridopsida
-	Reticuloidosporites pseudomurii Reticuloidosporites pseudomurii A further 2 specimens were recorded in the additional count
Lycopodiopsida
Lycopodiales - Lycopodiaceae	Lycopodiumsporites sp. Lycopodiumsporites sp. Delcourt and Sprumont 1955 clubmoss
Pteridopsida
-	Leiotriletes spp. Leiotriletes spp. Potonie and Kremp 1954 A further 1 specimens were recorded in the additional count
Polypodiopsida
- Osmundaceae	Baculatisporites sp. Baculatisporites sp. Thomson and Pflug 1953
- Polypodiaceae	Laevigatosporites spp. Laevigatosporites spp. Ibrahim 1933
- Gleicheniaceae	Gleicheniidites sp. Gleicheniidites sp. Dettmann 1963
Magnoliopsida
-	Malvacipollis spp., "Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Malvacipollis spp. Harris 1965 "Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Archangelsky 1973 A further 12 specimens were recorded in the additional count
Angiospermae
Fagales - Betulaceae	Alnipollenites verus Alnipollenites verus Potonie 1931 birch
Fagales - Fagaceae	Cupuliferoipollenites spp. Cupuliferoipollenites spp. Potonié A further 3 specimens were recorded in the additional count
Fagales - Juglandaceae	Caryapollenites imparalis, Caryapollenites wodehousei, Caryapollenites veripites, Caryapollenites inelegans, Momipites wyomingensis, Momipites ventifluminis Caryapollenites imparalis Nichols and Ott 1978 A further 11 specimens were recorded in the additional count Caryapollenites wodehousei Nichols and Ott 1978 A further 5 specimens were recorded in the additional count Caryapollenites veripites Wilson and Webster 1946 A further 9 specimens were recorded in the additional count Caryapollenites inelegans Nichols and Ott 1978 A further 2 specimens were recorded in the additional count Momipites wyomingensis Nichols and Ott 1978 A further 10 specimens were recorded in the additional count Momipites ventifluminis Nichols and Ott 1978
Proteales - Proteaceae	Triporopollenites spp. Triporopollenites spp. Pflug and Thomson 1953 A further 28 specimens were recorded in the additional count
Mesangiosperms - Liliaceae	Liliacidites spp. Liliacidites spp. Couper 1953