1961 In Paleontology
Plants Angiosperms Archosauromorphs Phytosaurs Pseudosuchians Dinosaurs Data courtesy of George Olshevsky's dinosaur genera list. Birds References {{DEFAULTSORT:1961 In Paleontology 1960s in paleontology Paleontology 1 ...
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Acer Beckianum
''Acer beckianum'' is an extinct maple species in the family Sapindaceae described from a single fossil wood section. The species is solely known from the Middle Miocene sediments exposed in central Washington in the United States. It is one of three Washington state ''Acer'' species described in 1961 from petrified wood. Distribution and paleoenvironment The type specimen was part of a collection compiled by Jay O'Leary, who was then a student of Harvard College, in 1954 from the west bank of the Columbia River near Vantage, Washington. The petrified woods of the area are preserved in an interbed area between the older Grande Ronde Basalt and the younger Wanapum basalts, with the interbed overlain by the Ginkgo Flow, the oldest segment of the Frenchman Springs Member of the Wanapum basalts. K–Ar dating performed on the Grande Ronde Basalts gives an age of 15.6 million years old, and dating of the Frenchman Springs Member gives a date of 15.3 million years old. This places the ...
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