PBDB Collection

York Ranch Flora (Oligocene of the United States)

Where: Madison County, Montana (45.5° N, 112.5° W: paleocoordinates 46.7° N, 106.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Dunbar Creek Member (Renova Formation), Oligocene (33.9 - 23.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: fluvial; poorly lithified, brown, silty shale and sandstone

• The coarse, lens-enclosing sandstone is about 150 ft. thick and overlain by weakly consolidated gravels. It contains numberous small, non-fossiliferous clay or silt pockets, is distinctly cross-bedded at low angles and the only outcrop of this kind in the Fossil Basin. Generally weakly consolidated, the sandstone is packed, however, forming several resistant low ledges, iron-cemented and rust-stained. Mild rain and melting snow is usually redily absorbed by the remaining sandstone. Both, the angular grains of the sandstone and the mica flakes of the lens, suggest a short distance of transportation for the sediments

Size classes: macrofossils, microfossils

Preservation: mold/impression, adpression

Collection methods: quarrying,

Primary reference: H. F. Becker. 1973. The York Ranch Flora of the Upper Ruby River Basin, Southwestern Montana. Palaeontographica Abteilung B 143:18-93 [H. Sims/H. Lindon/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 23793: authorized by Hallie Sims, entered by Heather Lindon on 21.07.2002, edited by Jason Cassara

Creative Commons license: CC BY (attribution)

Taxonomic list

• Includes a crinoid stem fragment and echinoderm spine fragments, probably reworked from Mississippian Madison Limestone.

Show authors, comments, and common names

unclassified
-	Pyracantha spatulata n. sp. Pyracantha spatulata n. sp.
Aves
-	Aves indet. Aves indet. Linnaeus 1758 bird Feather
Actinopteri
Cypriniformes - Cyprinidae	Amyzon sp. Amyzon sp. Cope 1872 carp-like fish Catastomid fish
Pisces
-	"Pisces indet." = Osteichthyes "Pisces indet." = Osteichthyes Huxley 1880 bony fish Fish scales
unclassified
-	Annelida indet. Annelida indet. Lamarck 1809
Insecta
-	Insecta indet. Insecta indet. Linnaeus 1758 insect wings of Diptera and other orders
Dicondylia -	Coleoptera indet. Coleoptera indet. Linnaeus 1758 beetle
Ephemeroptera - Isonychiidae	Isonychia sp. Isonychia sp. Eaton 1871 mayfly mayfly

Coniferales - Cupressaceae	cf. Metasequoia sp., Sequoia affinis cf. Metasequoia sp. Miki 1941 dawn redwood Winged seeds, cf. Metasequoia ? Sequoia affinis Lesquereux 1876 coast redwood Lesquereux
Dicotyledoneae
Ericales - Ericaceae	cf. Arctostaphylos sp. cf. Arctostaphylos sp. Adanson 1763 heather Leaf, cf. Arctostaphylos ?
Angiospermae
Fagales - Juglandaceae	Carya libbeyi, "Carya antiquorum" = Hicoria antiquora, Juglans cf. regia Carya libbeyi hickory (Lesquereux) MacGinitie "Carya antiquorum" = Hicoria antiquora Newberry 1868 Newberry Juglans cf. regia Linnaeus 1753 walnut L.
Fagales - Fagaceae	Castanea spokanensis, Quercus ? dispersa Castanea spokanensis chestnut (Knowlton) Chaney & Axelrod Quercus ? dispersa Lesquereux 1878 oak (Lesquereux) Axelrod
Fagales - Betulaceae	Carpinus lanceolata, Carpinus fraterna, Betula fairii, Alnus jarbidgana, Alnus relata Carpinus lanceolata hornbeam Becker Carpinus fraterna Lesquereux 1883 hornbeam Lesquereux Betula fairii Knowlton 1926 birch Knowlton Alnus jarbidgana alder Axelrod Alnus relata alder (Knowlton) Brown
Rosales - Ulmaceae	Celtis chaneyi, Celtis mccoshii, Ulmus montanensis, Ulmus speciosa, Zelkova hesperia, Zelkova nervosa Celtis chaneyi hackberry Smiley Celtis mccoshii Lesquereux 1883 hackberry Lesquereux Ulmus montanensis elm Becker Ulmus speciosa Newberry 1883 elm Newberry Zelkova hesperia zelkova Brown Zelkova nervosa zelkova (Newberry) Brown
Rosales - Rhamnaceae	Rhamnus crocea Rhamnus crocea buckthorn Nuttall
Rosales - Rosaceae	Prunus lyoniifolia n. sp., Prunus morangensis, Prunus scottii, Prunus (Amygdalus) wilcoxiana, Spiraea clavidens, cf. Potentilla sp., Rosa hilliae Prunus lyoniifolia n. sp. plum Prunus morangensis plum Axelrod Prunus scottii plum Heer Prunus (Amygdalus) wilcoxiana plum (Berry) LaMotte Spiraea clavidens meadowsweet Becker cf. Potentilla sp. Linnaeus 1753 cinquefoil Unidentified leaf, cf. Potentilla ? Rosa hilliae Lesquereux 1883 rose Lesquereux
Malpighiales - Salicaceae	Salix cockerelli, Salix hesperia, Salix laevigatoides, Salix longiacuminata, Salix stipulata n. sp., Salix succorensis, Salix schimperi, Salix cf. truckeana, Salix wimmeriana, Populus adamantea, Populus cedrusensis, Populus payettensis, Populus washoensis, Populus sp., Populus eotremuloides, Populus balsamoides Salix cockerelli willow Brown Salix hesperia willow (Knowlton) Condit Salix laevigatoides willow Axelrod Salix longiacuminata willow Knowlton Salix stipulata n. sp. willow Salix succorensis willow Chaney & Axelrod Salix schimperi Lesquereux 1888 willow Lesquereux Salix cf. truckeana Chaney 1944 willow Chaney Salix wimmeriana Göppert 1861 willow Goeppert Populus adamantea poplar Becker Populus cedrusensis poplar Wolfe Populus payettensis poplar (Knowlton) Axelrod Populus washoensis poplar Brown Populus sp. Linnaeus 1753 poplar Populus eotremuloides Knowlton 1898 poplar Knowlton Populus balsamoides Göppert 1855 poplar Goeppert
Celastrales - Celastraceae	cf. Euonymus spp. cf. Euonymus spp. Linnaeus 1753 spindle tree Leaf, cf. Euonymus ?
Fabales - Fabaceae	Leguminosites sp., Cercis spokanensis Leguminosites sp. Bowerbank 1840 legume Cercis spokanensis Knowlton 1926 redbud Knowlton
Malvales - Tiliaceae	Tilia inaequalis Tilia inaequalis linden MacGinitie
Sapindales - Anacardiaceae	Rhus praeovata, Rhus milleri Rhus praeovata sumac Chaney Rhus milleri Hollick 1904 sumac Hollick
Sapindales - Sapindaceae	Acer glabroides Acer glabroides Brown 1937 maple Brown
Vitales - Vitaceae	Vitis muscadinioides, Vitis washingtonensis, cf. Vitis sp. Vitis muscadinioides grapevine Becker Vitis washingtonensis grapevine (Knowlton) Brown cf. Vitis sp. Linnaeus 1753 grapevine Seed, cf. Vitis ?
Saxifragales - Hamamelidaceae	Exbucklandia oregonensis Exbucklandia oregonensis pipli (Chaney) Brown
Saxifragales - Cercidiphyllaceae	Cercidiphyllum arcticum Cercidiphyllum arcticum katsura (Heer) Brown
Cornales - Nyssaceae	Nyssa crenata Nyssa crenata tupelo Chaney
Cornales - Cornaceae	Cornus ovalis Cornus ovalis Lesquereux 1878 dogwood Lesquereux
Lamiales - Scrophulariaceae	Paulownia columbiana Paulownia columbiana figwort Smiley
Lamiales - Bignoniaceae	Catalpa rubyensis n. sp. Catalpa rubyensis n. sp. trumpet vine
Proteales - Platanaceae	cf. Platanus sp. cf. Platanus sp. Linnaeus 1753 plane tree
Poales - Poaceae	"? Gramineae indet." = Poaceae "? Gramineae indet." = Poaceae Barnhart 1895 true grass
Poales - Typhaceae	Typha lesquereuxi Typha lesquereuxi Cockerell 1908 bulrush Cockerell
Mesangiosperms - Araceae	Araceaeites sp. Araceaeites sp. Fritel 1910
Laurales - Lauraceae	Sassafras ashleyi, Sassafras hesperia Sassafras ashleyi sassafras Axelrod Sassafras hesperia sassafras Berry
Coniferites
-	Coniferites conicus n. sp., Coniferites ovatus n. sp., Coniferites strobiliformis n. sp., Coniferites "sp. A", Coniferites "sp. B", Coniferites "sp. C", Coniferites "sp. D", Coniferites "sp. E", Coniferites "sp. F", Coniferites "sp. G" Coniferites conicus n. sp. Coniferites ovatus n. sp. Coniferites strobiliformis n. sp. Coniferites "sp. A" Unger 1839 Coniferites "sp. B" Unger 1839 Coniferites "sp. C" Unger 1839 Coniferites "sp. D" Unger 1839 Coniferites "sp. E" Unger 1839 Coniferites "sp. F" Unger 1839 Coniferites "sp. G" Unger 1839
Antholithes
-	Antholithes asterias n. sp., Antholithes botryanthera n. sp., Antholithes divaricanthera n. sp., Antholithes explodens n. sp., Antholithes glandulifera n. sp., Antholithes onagracioides n. sp., Antholithes tropaeoloides n. sp., Antholithes tulipoidea n. sp., Antholithes umbelloidea n. sp., Antholithes urnanthera n. sp., Antholithes zygomorpha n. sp., Antholithes "sp. A", Antholithes "sp. B", Antholithes "sp. C", Antholithes "sp. D", Antholithes "sp. E", Antholithes "sp. F", Antholithes "sp. G", Antholithes "sp. H", Antholithes "sp. I", Antholithes "sp. J", Antholithes "sp. K", Antholithes "sp. L" Antholithes asterias n. sp. Antholithes botryanthera n. sp. Antholithes divaricanthera n. sp. Antholithes explodens n. sp. Antholithes glandulifera n. sp. Antholithes onagracioides n. sp. Antholithes tropaeoloides n. sp. Antholithes tulipoidea n. sp. Antholithes umbelloidea n. sp. Antholithes urnanthera n. sp. Antholithes zygomorpha n. sp. Antholithes "sp. A" Brongniart 1822 Antholithes "sp. B" Brongniart 1822 Antholithes "sp. C" Brongniart 1822 Antholithes "sp. D" Brongniart 1822 Antholithes "sp. E" Brongniart 1822 Antholithes "sp. F" Brongniart 1822 Antholithes "sp. G" Brongniart 1822 Antholithes "sp. H" Brongniart 1822 Antholithes "sp. I" Brongniart 1822 Antholithes "sp. J" Brongniart 1822 Antholithes "sp. K" Brongniart 1822 Antholithes "sp. L" Brongniart 1822
Lycopodiopsida
Isoetales - Isoetaceae	Isoetes trullata n. sp. Isoetes trullata n. sp. quillwort
Polypodiopsida
Equisetales - Equisetidae	Equisetum aquatile n. sp. Equisetum aquatile n. sp. horsetail
Carpites
-	Carpites amygdaloides n. sp., Carpites carumcarvi n. sp., Carpites eludens n. sp., Carpites gracilens n. sp., Carpites paniculatus n. sp., Carpites racemosus n. sp., Carpites "sp. A", Carpites "sp. B", Carpites "sp. C", Carpites "sp. D", Carpites "sp. E", Carpites "sp. F", Carpites "sp. G", Carpites "sp. H", Carpites "sp. I", Carpites "sp. J", Carpites "sp. K", Carpites "sp. L", Carpites "sp. M", Carpites "sp. N", Carpites "sp. O", Carpites "sp. P", Carpites "sp. Q", Carpites "sp. R", Carpites "sp. S", Carpites "sp. T", Carpites "sp. U", Carpites "sp. V", Carpites "sp. W", Carpites "sp. X", Carpites "sp. Y", Carpites "sp. Z", Carpites "sp. 1", Carpites "sp. 2", Carpites "sp. 3", Carpites "sp. 4", Carpites "sp. 5", Carpites "sp. 6" Carpites amygdaloides n. sp. Carpites carumcarvi n. sp. Carpites eludens n. sp. Carpites gracilens n. sp. Carpites paniculatus n. sp. Carpites racemosus n. sp. Carpites "sp. A" Schimper 1874 Carpites "sp. B" Schimper 1874 Carpites "sp. C" Schimper 1874 Carpites "sp. D" Schimper 1874 Carpites "sp. E" Schimper 1874 Carpites "sp. F" Schimper 1874 Carpites "sp. G" Schimper 1874 Carpites "sp. H" Schimper 1874 Carpites "sp. I" Schimper 1874 Carpites "sp. J" Schimper 1874 Carpites "sp. K" Schimper 1874 Carpites "sp. L" Schimper 1874 Carpites "sp. M" Schimper 1874 Carpites "sp. N" Schimper 1874 Carpites "sp. O" Schimper 1874 Carpites "sp. P" Schimper 1874 Carpites "sp. Q" Schimper 1874 Carpites "sp. R" Schimper 1874 Carpites "sp. S" Schimper 1874 Carpites "sp. T" Schimper 1874 Carpites "sp. U" Schimper 1874 Carpites "sp. V" Schimper 1874 Carpites "sp. W" Schimper 1874 Carpites "sp. X" Schimper 1874 Carpites "sp. Y" Schimper 1874 Carpites "sp. Z" Schimper 1874 Carpites "sp. 1" Schimper 1874 Carpites "sp. 2" Schimper 1874 Carpites "sp. 3" Schimper 1874 Carpites "sp. 4" Schimper 1874 Carpites "sp. 5" Schimper 1874 Carpites "sp. 6" Schimper 1874
Carpites pruniformis
-	Carpites pruniformis n. sp. Carpites pruniformis n. sp. Heer 1859