Also known as Bridge Creek Flora
Where: Wheeler County, Oregon (44.9° N, 120.4° W: paleocoordinates 44.6° N, 109.6° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Early/Lower Oligocene (33.9 - 28.4 Ma)
• formation-level stratigraphic resolution
Environment/lithology: terrestrial
Size class: mesofossils
Preservation: mold/impression, original carbon
Collection methods: bulk,
• The most common taxa in the Iron Mountain assemblage are Metasequoia, Alnus, and Asterocarpinus/Paracarpinus, followed by Acer, and Cercidiphyllum. Pinus, Quercus, and Ulmus are very rare.
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 35236: authorized by Bruce Tiffney, entered by Julia Fosdick on 19.11.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Craigia | |
Dicotyledoneae | |
Angiospermae | |
Cercis maurerae redbud
Cladrastis oregonensis yellowwood | |
Ulmus speciosa Newberry 1883 elm | |
Amelanchier grayi shadbush
Crataegus merriamii hawthorn | |
Hovenia oregonensis buckthorn | |
Alnus heterodonta alder
Alnus sp. Miller 1754 alder | |
Quercus consimilis Newberry 1883 oak | |
Rhus lesquereuxii Knowlton and Cockerell 1919 sumac | |
Cedrela merrillii mahogany | |
Acer osmontii, Acer ashwillii, Acer sp. 1, Acer sp. A, Acer sp. B, Acer sp. C, Acer manchesteri, Acer cranei
Acer osmontii maple
Acer ashwillii maple
Acer sp. 1 Linnaeus 1753 maple
Acer sp. A Linnaeus 1753 maple
Acer sp. B Linnaeus 1753 maple
Acer sp. C Linnaeus 1753 maple
Acer manchesteri Wolfe and Tanai 1987 maple
Acer cranei Wolfe and Tanai 1987 maple | |
Zingiberopsis sp. Hickey 1977 | |
Florissantia speirii Manchester 1992 nightshade | |
Cercidiphyllum crenatum Brown 1935 katsura | |
Ribes sp. Linnaeus 1753 currant | |
Hydrangea sp. Linnaeus 1753 hydrangea | |
Palaeophytocrene sp. Reid and Chandler 1933 white pear | |
Mahonia simplex barberry | |
Metasequoia sp. Miki 1941 dawn redwood | |
Pinopsida | |
Pinus johndayensis pine | |
Torreya masonii yew | |
Polypodiopsida | |
Equisetum sp. Linnaeus 1753 horsetail | |
Saportaspermum | |
Plafkeria | |