PBDB Collection

USGS core 2A, sample D6707-A (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; 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 (86-117)more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 236799: 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
Santalales - Loranthaceae	Syncolporites cf. minimus Syncolporites cf. minimus mistletoe A further 2 specimens were recorded in the additional count
Fagales - Betulaceae	Alnipollenites trina Alnipollenites trina birch A further 1 specimens were recorded in the additional count
Proteales -	Triatriopollenites granulatus Triatriopollenites granulatus A further 1 specimens were recorded in the additional count
unclassified
-	"Tricolpate A." indet., "Taxodiaceae/Cupressaceae" indet. "Tricolpate A." indet. "Taxodiaceae/Cupressaceae" indet.
Angiospermae
Proteales - Proteaceae	Proteacidites cf. thalmanni Proteacidites cf. thalmanni
Cornales - Nyssaceae	Nyssa ingentipollinia Nyssa ingentipollinia tupelo
Pteridopsida
-	Reticuloidosporites pseudomurii Reticuloidosporites pseudomurii
Angiospermae
Malvales - Tiliaceae	Tilia tetraforaminipites Tilia tetraforaminipites linden A further 2 specimens were recorded in the additional count
Mesangiosperms - Arecaceae	Arecipites cf. tenuiexinous Arecipites cf. tenuiexinous palm A further 4 specimens were recorded in the additional count
unclassified
-	Ulmipollenites "krempii/tricostatus", "Tricolpate/tricolporate" indet., "Tricolpate fine reticulum" indet., "Bisaccate pollen" indet. Ulmipollenites "krempii/tricostatus" A further 4 specimens were recorded in the additional count "Tricolpate/tricolporate" indet. A further 1 specimens were recorded in the additional count "Tricolpate fine reticulum" indet. A further 6 specimens were recorded in the additional count "Bisaccate pollen" indet. A further 13 specimens were recorded in the additional count
Angiospermae
Gunnerales -	Tricolpites hians Tricolpites hians A further 37 specimens were recorded in the additional count
Pteridopsida
-	Leiotriletes spp. Leiotriletes spp. Potonie and Kremp 1954 A further 1 specimens were recorded in the additional count
Polypodiopsida
- Polypodiaceae	Laevigatosporites spp. Laevigatosporites spp. Ibrahim 1933 A further 1 specimens were recorded in the additional count
- Gleicheniaceae	Gleicheniidites sp. Gleicheniidites sp. Dettmann 1963 A further 2 specimens were recorded in the additional count
Equisetopsida
Pinidae - Pinidae	"Corollina sp." = Classopollis "Corollina sp." = Classopollis Pflug 1953
Magnoliopsida
-	"Tricolpites anguloluminosus" = Albertipollenites anguloluminosus "Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Archangelsky 1973 A further 17 specimens were recorded in the additional count
Angiospermae
-	Paraalnipollenites cf. confusus Paraalnipollenites cf. confusus
Proteales - Proteaceae	Triporopollenites spp. Triporopollenites spp. Pflug and Thomson 1953 A further 10 specimens were recorded in the additional count
Fagales - Fagaceae	Cupuliferoipollenites spp. Cupuliferoipollenites spp. Potonié A further 4 specimens were recorded in the additional count
Fagales - Betulaceae	Alnipollenites verus Alnipollenites verus Potonie 1931 birch
Fagales - Juglandaceae	Momipites ventifluminis, Momipites wyomingensis, Caryapollenites wodehousei, Caryapollenites inelegans, Caryapollenites veripites, Caryapollenites imparalis Momipites ventifluminis Nichols and Ott 1978 A further 2 specimens were recorded in the additional count Momipites wyomingensis Nichols and Ott 1978 A further 17 specimens were recorded in the additional count Caryapollenites wodehousei Nichols and Ott 1978 A further 2 specimens were recorded in the additional count Caryapollenites inelegans Nichols and Ott 1978 A further 5 specimens were recorded in the additional count Caryapollenites veripites Wilson and Webster 1946 A further 17 specimens were recorded in the additional count Caryapollenites imparalis Nichols and Ott 1978 A further 12 specimens were recorded in the additional count
Dicotyledoneae
Ericales - Ericaceae	Ericipites sp. Ericipites sp. Wodehouse 1933 heather
Bryopsida
-	Stereisporites spp. Stereisporites spp. Pflug 1953