PBDB Collection

USGS core 5A, sample D6711-F (Paleocene of the United States)

Where: Custer County, Montana (46.5° N, 105.7° W: paleocoordinates 52.1° N, 83.2° W)

• coordinate estimated from map

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

• Pawnee coal bed.

•From Pocknall and Nichols 1996: Caryapollenites Assemblage Zone, Pistillipollenites mcgregorii Subzone.

Environment/lithology: terrestrial; shale

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 236721: authorized by Phillip Jardine, entered by Hannah Morck on 22.10.2024

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 fine reticulum" indet. "Tricolpate fine reticulum" indet.
Angiospermae
Malvales - Tiliaceae	Tilia tetraforaminipites Tilia tetraforaminipites linden
unclassified
-	"Taxodiaceae/Cupressaceae" indet., Insulapollenites rugulatus, Ulmipollenites "krempii/tricostatus" "Taxodiaceae/Cupressaceae" indet. Insulapollenites rugulatus Ulmipollenites "krempii/tricostatus"
Angiospermae
Cornales - Nyssaceae	Nyssa ingentipollinia Nyssa ingentipollinia tupelo
Gunnerales -	Tricolpites hians Tricolpites hians A further 3 specimens were recorded in the additional count
unclassified
-	"Tricolpate B." indet., "Tricolpate/tricolporate" indet., "Bisaccate pollen" indet., "Tricolporate B." indet. "Tricolpate B." indet. A further 5 specimens were recorded in the additional count "Tricolpate/tricolporate" indet. A further 6 specimens were recorded in the additional count "Bisaccate pollen" indet. A further 8 specimens were recorded in the additional count "Tricolporate B." indet. A further 3 specimens were recorded in the additional count
Magnoliopsida
-	Ailanthipites cf. berryi Ailanthipites cf. berryi A further 3 specimens were recorded in the additional count
Angiospermae
Proteales -	Triatriopollenites granulatus Triatriopollenites granulatus A further 2 specimens were recorded in the additional count
unclassified
-	"Tricolpate A." indet. "Tricolpate A." indet. A further 2 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
Magnoliopsida
-	"Tricolpites anguloluminosus" = Albertipollenites anguloluminosus "Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Archangelsky 1973 A further 8 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 specimen was recorded in the additional count
Fagales - Juglandaceae	Caryapollenites imparalis, Caryapollenites wodehousei, Caryapollenites veripites, Momipites wyomingensis, Momipites ventifluminis Caryapollenites imparalis Nichols and Ott 1978 A further 3 specimens were recorded in the additional count Caryapollenites wodehousei Nichols and Ott 1978 A further specimen was recorded in the additional count Caryapollenites veripites Wilson and Webster 1946 A further 1 specimens were recorded in the additional count Momipites wyomingensis Nichols and Ott 1978 A further 15 specimens were recorded in the additional count Momipites ventifluminis Nichols and Ott 1978 A further 2 specimens were recorded in the additional count
Proteales - Proteaceae	Triporopollenites spp. Triporopollenites spp. Pflug and Thomson 1953 A further 39 specimens were recorded in the additional count
Mesangiosperms - Liliaceae	Liliacidites spp. Liliacidites spp. Couper 1953