Butler basin: Early/Lower Oligocene, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Cinnamomophyllum bendirei leaf
Unknown dicotyledonous sp. 28 leaf
Craigia oregonensis seed/fruit
Coniferales - Cupressaceae
Metasequoia sp. multi organs Miki 1941
Calocedrus schornii leaf, seed repro
Pinopsida - Pinales - Taxaceae
Torreya masonii leaf
Pinopsida - Pinales - Pinaceae
Pinus johndayensis multi organs
Angiospermae - Nymphaeales - Nymphaeaceae
Nuphar sp. axis Smith 1809
Angiospermae - Proteales - Platanaceae
Platanus condonii leaf
Angiospermae - Saxifragales - Cercidiphyllaceae
Cercidiphyllum crenatum leaf Brown 1935
Angiospermae - Cornales - Cornaceae
Cornus sp. leaf Linnaeus 1753
Angiospermae - Fagales - Juglandaceae
Pterocarya sp. leaf Kunth 1824
Pterocarya occidentalis seed/fruit
Angiospermae - Fagales - Betulaceae
Alnus heterodonta leaf
Angiospermae - Fagales - Fagaceae
Quercus consimilis leaf Newberry 1883
Fagus pacifica leaf, seed/fruit
Angiospermae - Rosales - Pomaceae
cf. Malus sp. leaf Miller 1758
Crataegus merriamii leaf
Angiospermae - Rosales - Ulmaceae
Cedrelospermum lineatum leaf, seed/fruit
Angiospermae - Malvales - Tiliaceae
Tilia circularis multi organs
Angiospermae - Sapindales - Sapindaceae
Acer ashwillii leaf
Acer sp. A seed/fruit Linnaeus 1753
see common names

Geography
Country:United States State/province:Oregon County:Grant
Coordinates: 44.6° North, 119.6° West (view map)
Paleocoordinates:44.3° North, 108.8° West
Basis of coordinate:stated in text
Geographic resolution:local area
Time
Period:Paleogene Epoch:Oligocene
Stage:Rupelian 10 m.y. bin:Cenozoic 4
Key time interval:Early/Lower Oligocene
Age range of interval:33.90000 - 27.82000 m.y. ago
Stratigraphy
Formation:John Day
Stratigraphic resolution:formation
Lithology and environment
Lithology description: tuffaceous shales
Environment:lacustrine indet.
Taphonomy
Modes of preservation:body,mold/impression,original carbon
Size of fossils:mesofossils
Collection methods and comments
Collection excludes:all microfossils,some macrofossils
Collection methods:bulk,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Collection includes Calocedrus and Pterocarya as unique taxa.
Metadata
Also known as:Bridge Creek Flora
Database number:35269
Authorizer:B. Tiffney Enterer:J. Fosdick
Modifier:J. Fosdick Research group:paleobotany
Created:2003-11-21 11:24:10 Last modified:2003-11-21 13:24:11
Access level:database members Released:2004-11-21 11:24:10
Creative Commons license:CC BY
Reference information

Primary reference:
2582. 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]