PBDB Collection

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

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

• Paleocoordinates: 53.4° N, 71.6° W (Wright 2013)

• 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; shale

• 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 (86-117)more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 236795: authorized by Phillip Jardine, entered by Hannah Morck on 31.10.2024

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

Angiospermae
Gunnerales -	Tricolpites hians Tricolpites hians A further 11 specimens were recorded in the additional count
unclassified
-	Ulmipollenites "krempii/tricostatus", "Tricolpate/tricolporate" indet., "Tricolporate B." indet. Ulmipollenites "krempii/tricostatus" A further 4 specimens were recorded in the additional count "Tricolpate/tricolporate" indet. A further 3 specimens were recorded in the additional count "Tricolporate B." indet. A further 2 specimens were recorded in the additional count
Angiospermae
Malvales - Tiliaceae	Tilia tetraforaminipites Tilia tetraforaminipites linden A further 1 specimens were recorded in the additional count
Santalales - Loranthaceae	Syncolporites cf. minimus Syncolporites cf. minimus mistletoe A further 1 specimens were recorded in the additional count
Mesangiosperms - Araceae	Pandaniidites radicus Pandaniidites radicus A further 1 specimens were recorded in the additional count
unclassified
-	"Tricolpate A." indet., "Taxodiaceae/Cupressaceae" indet., "Bisaccate pollen" indet. "Tricolpate A." indet. "Taxodiaceae/Cupressaceae" indet. "Bisaccate pollen" indet.
Angiospermae
Fagales - Fagaceae	Quercus explanata Quercus explanata oak A further 2 specimens were recorded in the additional count
unclassified
-	Polyatriopollenites vermontensis, Insulapollenites rugulatus Polyatriopollenites vermontensis A further 4 specimens were recorded in the additional count Insulapollenites rugulatus A further 6 specimens were recorded in the additional count
Pteridopsida
-	Reticuloidosporites pseudomurii Reticuloidosporites pseudomurii A further 2 specimens were recorded in the additional count
unclassified
-	"Tricolpate fine reticulum" indet. "Tricolpate fine reticulum" indet. A further 13 specimens were recorded in the additional count
Angiospermae
Cornales - Nyssaceae	Nyssa ingentipollinia Nyssa ingentipollinia tupelo A further 20 specimens were recorded in the additional count
Proteales - Proteaceae	Triporopollenites spp. Triporopollenites spp. Pflug and Thomson 1953 A further 15 specimens were recorded in the additional count
Fagales - Juglandaceae	Caryapollenites imparalis, Caryapollenites veripites, Caryapollenites inelegans, Momipites ventifluminis, Momipites wyomingensis, Momipites amplus Caryapollenites imparalis Nichols and Ott 1978 A further 10 specimens were recorded in the additional count Caryapollenites veripites Wilson and Webster 1946 A further 13 specimens were recorded in the additional count Caryapollenites inelegans Nichols and Ott 1978 A further 1 specimens were recorded in the additional count Momipites ventifluminis Nichols and Ott 1978 Momipites wyomingensis Nichols and Ott 1978 A further 9 specimens were recorded in the additional count Momipites amplus Leffingwell 1971
Fagales - Fagaceae	Cupuliferoipollenites spp. Cupuliferoipollenites spp. Potonié A further 3 specimens were recorded in the additional count
Fagales - Betulaceae	Alnipollenites verus Alnipollenites verus Potonie 1931 birch A further 3 specimens were recorded in the additional count
Magnoliopsida
-	"Tricolpites anguloluminosus" = Albertipollenites anguloluminosus "Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Archangelsky 1973 A further 9 specimens were recorded in the additional count
Lycopodiopsida
Lycopodiales - Lycopodiaceae	Lycopodiumsporites sp. Lycopodiumsporites sp. Delcourt and Sprumont 1955 clubmoss
Equisetopsida
Pinidae - Pinidae	"Corollina sp." = Classopollis "Corollina sp." = Classopollis Pflug 1953