PBDB Collection

USGS core 1A, sample D6720-I (Paleocene of the United States)

Where: Sheridan County, Wyoming (44.8° N, 106.1° W: paleocoordinates 50.5° N, 84.3° 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; coal

• 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 more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 236851: 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

Angiospermae
Proteales -	Triatriopollenites granulatus Triatriopollenites granulatus
Santalales - Loranthaceae	Syncolporites cf. minimus Syncolporites cf. minimus mistletoe
unclassified
-	Insulapollenites rugulatus Insulapollenites rugulatus
Angiospermae
Fagales - Fagaceae	Quercus explanata Quercus explanata oak
Mesangiosperms - Arecaceae	Arecipites cf. tenuiexinous Arecipites cf. tenuiexinous palm
unclassified
-	Ulmipollenites "krempii/tricostatus" Ulmipollenites "krempii/tricostatus"
Pteridopsida
-	Reticuloidosporites pseudomurii Reticuloidosporites pseudomurii
unclassified
-	"Tricolporate B." indet., "Tricolporate A." indet., "Tricolpate A." indet., "Bisaccate pollen" indet. "Tricolporate B." indet. "Tricolporate A." indet. "Tricolpate A." indet. "Bisaccate pollen" indet.
Angiospermae
Gunnerales -	Tricolpites hians Tricolpites hians
unclassified
-	"Tricolpate fine reticulum" indet. "Tricolpate fine reticulum" indet.
Angiospermae
Cornales - Nyssaceae	Nyssa ingentipollinia Nyssa ingentipollinia tupelo
unclassified
-	"Taxodiaceae/Cupressaceae" indet. "Taxodiaceae/Cupressaceae" indet.
Angiospermae
Fagales - Betulaceae	Alnus scoticus Alnus scoticus alder
unclassified
-	Polyatriopollenites vermontensis Polyatriopollenites vermontensis
Angiospermae
Malvales - Tiliaceae	Tilia tetraforaminipites Tilia tetraforaminipites linden
Fagales - Betulaceae	Alnipollenites trina Alnipollenites trina birch
Pteridopsida
-	Leiotriletes spp. Leiotriletes spp. Potonie and Kremp 1954
Polypodiopsida
- Polypodiaceae	Laevigatosporites spp. Laevigatosporites spp. Ibrahim 1933
Bryopsida
-	Stereisporites spp. Stereisporites spp. Pflug 1953
Magnoliopsida
-	"Tricolpites anguloluminosus" = Albertipollenites anguloluminosus "Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Archangelsky 1973
Angiospermae
Fagales - Betulaceae	Alnipollenites verus Alnipollenites verus Potonie 1931 birch
Fagales - Fagaceae	Cupuliferoipollenites spp. Cupuliferoipollenites spp. Potonié
Fagales - Juglandaceae	Caryapollenites imparalis, Caryapollenites wodehousei, Caryapollenites veripites, Caryapollenites inelegans, Momipites wyomingensis, Momipites ventifluminis Caryapollenites imparalis Nichols and Ott 1978 Caryapollenites wodehousei Nichols and Ott 1978 Caryapollenites veripites Wilson and Webster 1946 Caryapollenites inelegans Nichols and Ott 1978 Momipites wyomingensis Nichols and Ott 1978 Momipites ventifluminis Nichols and Ott 1978
Proteales - Proteaceae	Triporopollenites spp. Triporopollenites spp. Pflug and Thomson 1953
Gunnerales -	Tricolpites "cf. Eucommia sp." Tricolpites "cf. Eucommia sp." Couper 1953
Mesangiosperms - Liliaceae	Liliacidites spp. Liliacidites spp. Couper 1953
Dicotyledoneae
Ericales - Ericaceae	Ericipites sp. Ericipites sp. Wodehouse 1933 heather