Eocene microthermal highland plant communities from the Okanagan Highlands (British Columbia/Washington)

The Eocene Okanagan Highlands was an upland region of southern British Columbia and northern Washington State spanning ~1000 km north-south and a range of elevation. Early to Middle Eocene fossiliferous sediments in the Okanagan Highlands contain extensive and well preserved pollen, and plant and insect megafossils. These fossil biotas provide evidence of thermophilic-temperate associations, with occurrences of 'subtropical' or mesothermal biota...