Painted Hills (Oligocene of the United States)

Also known as Bridge Creek Flora

Where: Wheeler County, Oregon (44.6° N, 120.3° W: paleocoordinates 44.3° N, 109.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: John Day Formation, Early/Lower Oligocene (33.9 - 28.4 Ma)

• formation-level stratigraphic resolution

Environment/lithology: lacustrine; tuff

• "fine-grained, bedded lacustrine tuffs"

Size class: mesofossils

Preservation: mold/impression, original carbon

Collection methods: bulk,

• "assemblage is dominated by Alnus, Betula, Quercus, and Metasequoia....apparent absence of Asterocarpinus fruits and Paracarpinus leaves in this assemblage contrasts with their presence in all other Bridge Creek assemblages examined in this study."

Primary reference: H. W. Meyer and S. R. Manchester. 1997. The Oligocene Bridge Creek flora of the John Day Formation, Oregon. University of California Publications in Geological Sciences 141:1-195 [J. Alroy/J. Alroy/H. Wang]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 35220: authorized by Bruce Tiffney, entered by Julia Fosdick on 18.11.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pinales - Taxodiaceae
Metasequoia sp. Miki 1941 dawn redwood
 Equisetales - Equisetaceae
Equisetum sp. Linnaeus
 Urticales - Dilleniidae
Ulmus sp. 1 Linnaeus 1753 elm
 Juglandales - Hamamelidae
 Saxifragales - Hamamelidaceae
Liquidambar sp. Linnaeus 1753 sweetgum
 Saxifragales - Cercidiphyllaceae
 Fabales - Leguminosae
 Malvales - Tiliaceae
 Rosales - Rosaceae
Rosa sp. Linnaeus 1753 rose
 Rosales - Saxifragaceae
Hydrangea sp. Linnaeus 1753 hydrangea
 Sapindales - Anacardiaceae
 Sapindales - Aceraceae
Acer sp. A Linnaeus 1753 maple
Acer sp. C Linnaeus 1753 maple
Dipteronia sp. Oliver 1889
 Proteales - Platanaceae
Platanus exaspera plane tree
Platanus sp. Linnaeus 1753 plane tree
 Fagales - Betulaceae
Alnus sp. Miller 1768 alder
 Fagales - Fagaceae
Quercus sp. Linnaeus 1753
Quercus berryi Trelease 1918
 Ranunculales - Berberidaceae
Florissantia speirii Manchester 1992