UCMP loc. P3345, Chalk Bluff (Eocene of the United States)

Where: Nevada County, California (39.2° N, 120.9° W: paleocoordinates 40.8° N, 106.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Middle Eocene (47.8 - 37.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; brown claystone

Size class: macrofossils

Preservation: mold/impression, adpression, original carbon

Collection methods: surface (in situ),

Primary reference: H. D. MacGinitie. 1941. A Middle Eocene Flora from the Central Sierra Nevada. Carnegie Institution of Washington Publication 534:1-178 [H. Sims/H. Lindon/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 23995: authorized by Hallie Sims, entered by Heather Lindon on 26.07.2002, edited by Hallie Sims

Creative Commons license: CC BY (attribution)

Taxonomic list

Dicotyledoneae
 Myrtales - Combretaceae
Terminalia estamina MacGinitie 1941
 Ericales - Theaceae
Gordonia egregia Lesquereux 1878 tea
 Ericales - Ebenaceae
Diospyros retinervis MacGinitie 1941
Angiospermae
 Vitales - Vitaceae
Cissus pyriformis MacGinitie 1941
 Sapindales - Anacardiaceae
Rhus mixta Lesquereux 1878 sumac
 Sapindales - Sapindaceae
Thouinopsis myricaefolia Lesquereux 1878 soapberry
 Sapindales - Burseraceae
Canarium californicum Lesquereux 1878
 Fabales - Fabaceae
Dalbergia rubra n. sp. MacGinitie 1941 legume
 Rosales - Rosaceae
Vauquelinia exigua n. sp. MacGinitie 1941 rose
 Rosales - Rhamnaceae
Rhamnidium chaneyi Potbury 1935 buckthorn
Rhamnus calyptus MacGinitie 1941 buckthorn
Rhamnus plenus MacGinitie 1937 buckthorn
 Rosales - Ulmaceae
Chaetoptelea pseudofulva Lesquereux 1878 elm
 Malpighiales - Euphorbiaceae
Mallotus riparius MacGinitie 1941 spurge
 Malpighiales - Salicaceae
Salix ionensis MacGinitie 1941 willow
 Fagales - Fagaceae
Quercus nevadensis Lesquereux 1878 oak
Quercus distincta Lesquereux 1878 oak
Castanopsis longipetiolatum Knowlton 1899 chinquapin
 Fagales - Betulaceae
Alnus operia MacGinitie 1941 alder
 Fagales - Juglandaceae
Engelhardtia nevadensis MacGinitie 1941
 Proteales - Platanaceae
Platanophyllum whitenyi, Platanus appendiculata, "Platanophyllum angustiloba" = Macginitiea angustiloba, "Calycites mikanoides" = Macginistemon mikanoides
Platanus appendiculata Lesquereux 1878 plane tree
"Platanophyllum angustiloba" = Macginitiea angustiloba Lesquereux 1878
Plantanophyllum angustiloba serrata, new variety
"Calycites mikanoides" = Macginistemon mikanoides MacGinitie 1941
 Saxifragales - Hamamelidaceae
Liquidambar californicum Lesquereux 1878 sweetgum
 Saxifragales - Saxifragaceae
Hydrangea californica n. sp. MacGinitie 1941 hydrangea
 Saxifragales - Cercidiphyllaceae
Cercidiphyllum elongatum Brown 1939 katsura
 Gentianales - Apocynaceae
Asclepiadites laterita n. sp. MacGinitie 1941 dogbane
 Ranunculales - Menispermaceae
Hyperbaena diforma Potbury 1935
 Laurales - Lauraceae
Persea pseudocarolinensis Lesquereux 1878 laurel
Cinnamomum dilleri Knowlton 1902 cinnamon
 Bennettitales -
Zamites californica MacGinitie 1941
Phyllites
  -
Phyllites cordiaefolia n. sp. MacGinitie 1941
Carpites
  -
Carpites egregia MacGinitie 1941