PBDB Collection

USGS core 4A, sample D6709-A (Paleocene of the United States)

Where: Sheridan County, Wyoming (44.9° N, 106.1° W: paleocoordinates 50.6° N, 84.2° W)

• coordinate estimated from map

• hand sample-level geographic resolution

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

• Wall coal bed.

Environment/lithology: fluvial; coal

• From Pocknall and Nichols 1996 Figure 2: 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 236814: 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
-	"Tricolpate B." indet. "Tricolpate B." indet. A further 5 specimens were recorded in the additional count
Angiospermae
Proteales -	Triatriopollenites granulatus Triatriopollenites granulatus A further 1 specimens were recorded in the additional count
unclassified
-	"Taxodiaceae/Cupressaceae" indet. "Taxodiaceae/Cupressaceae" indet.
Angiospermae
Fagales - Betulaceae	Alnipollenites trina Alnipollenites trina birch
Mesangiosperms - Araceae	Pandaniidites radicus Pandaniidites radicus
unclassified
-	Paraalnipollenites cf. confusus, Pistillipollenites mcgregorii, Insulapollenites rugulatus Paraalnipollenites cf. confusus Pistillipollenites mcgregorii Insulapollenites rugulatus
Angiospermae
Buxales - Buxaceae	Erdtmanipollis pachysandroides Erdtmanipollis pachysandroides boxwood
Cornales - Nyssaceae	Nyssa ingentipollinia Nyssa ingentipollinia tupelo
Mesangiosperms - Arecaceae	Arecipites cf. tenuiexinous Arecipites cf. tenuiexinous palm
unclassified
-	"Bisaccate pollen" indet., "Tricolpate C." indet. "Bisaccate pollen" indet. A further 4 specimens were recorded in the additional count "Tricolpate C." indet. A further 6 specimens were recorded in the additional count
Angiospermae
Gunnerales -	Tricolpites hians Tricolpites hians A further 38 specimens were recorded in the additional count
unclassified
-	Ulmipollenites "krempii/tricostatus", "Tricolpate/tricolporate" indet. Ulmipollenites "krempii/tricostatus" A further 14 specimens were recorded in the additional count "Tricolpate/tricolporate" indet. A further 4 specimens were recorded in the additional count
Angiospermae
Santalales - Loranthaceae	Syncolporites cf. minimus Syncolporites cf. minimus mistletoe A further 21 specimens were recorded in the additional count
Equisetopsida
Pinidae - Pinidae	? Araucariacites sp., "Corollina sp." = Classopollis ? Araucariacites sp. Cookson and Couper 1953 A further 4 specimens were recorded in the additional count "Corollina sp." = Classopollis Pflug 1953
Ginkgoopsida
Ephedrales -	Ephedripites spp. Ephedripites spp. Bolkhovitina and Potonié 1958
Pteridopsida
-	Leiotriletes spp. Leiotriletes spp. Potonie and Kremp 1954 A further 4 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
Bryopsida
-	Stereisporites spp. Stereisporites spp. Pflug 1953 A further 1 specimens were recorded in the additional count
Magnoliopsida
-	Malvacipollis spp., Periporopollenites sp., "Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Malvacipollis spp. Harris 1965 Periporopollenites sp. Pflug and Thomson 1953 A further 1 specimens were recorded in the additional count "Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Archangelsky 1973 A further 5 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 4 specimens were recorded in the additional count
Fagales - Juglandaceae	Caryapollenites imparalis, Caryapollenites wodehousei, Caryapollenites veripites, Caryapollenites inelegans, Momipites wyomingensis, Momipites amplus, Momipites ventifluminis Caryapollenites imparalis Nichols and Ott 1978 A further 10 specimens were recorded in the additional count Caryapollenites wodehousei Nichols and Ott 1978 A further 4 specimens were recorded in the additional count Caryapollenites veripites Wilson and Webster 1946 A further 6 specimens were recorded in the additional count Caryapollenites inelegans Nichols and Ott 1978 Momipites wyomingensis Nichols and Ott 1978 A further 45 specimens were recorded in the additional count Momipites amplus Leffingwell 1971 Momipites ventifluminis Nichols and Ott 1978 A further 12 specimens were recorded in the additional count
Proteales - Proteaceae	Triporopollenites spp. Triporopollenites spp. Pflug and Thomson 1953 A further 8 specimens were recorded in the additional count
Dicotyledoneae
Ericales - Ericaceae	Ericipites sp. Ericipites sp. Wodehouse 1933 heather