Butler basin (Oligocene of the United States)

Also known as Bridge Creek Flora

Where: Grant County, Oregon (44.6° N, 119.6° W: paleocoordinates 44.3° N, 108.8° W)

• coordinate stated in text

• local area-level geographic resolution

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

• formation-level stratigraphic resolution

Environment/lithology: lacustrine

• tuffaceous shales

Size class: mesofossils

Preservation: mold/impression, original carbon

Collection methods: bulk,

• Collection includes Calocedrus and Pterocarya as unique taxa.

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 35269: authorized by Bruce Tiffney, entered by Julia Fosdick on 21.11.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Pinopsida
 Pinales - Pinaceae
 Pinales - Taxodiaceae
Metasequoia sp. Miki 1941 dawn redwood
Dicotyledonae
 Urticales - Dilleniidae
 Juglandales - Hamamelidae
Pterocarya sp. Kunth 1824 wingnut
Magnoliopsida
 Saxifragales - Cercidiphyllaceae
 Malvales - Tiliaceae
 Rosales - Rosaceae
 Sapindales - Aceraceae
Acer sp. A Linnaeus 1753 maple
 Proteales - Platanaceae
 Cornales - Cornaceae
Cornus sp. Linnaeus 1753 dogwood
 Fagales - Betulaceae
 Fagales - Fagaceae