Name: Presentation: Climate and Vegetation of Oregon Over the Past 50 Million Years
Start: 2025-11-17T19:00:00-08:00
End: 2025-11-17T21:00:00-08:00
Location: Amazon Community Center, City of Eugene

Presentation: Climate and Vegetation of Oregon Over the Past 50 Million Years

Come and listen to Dr. Greg Retallack, Geology Professor Emeritus, Department of Earth Sciences, University of Oregon!!
At our monthly meeting he will share his knowledge about Oregons climate and vegetation over the past 50 million years.
Oregon has a long fossil record of fossil plants and soils revealing dramatic paleoclimatic changes over the past 50 million years. Central Oregon 45 million years ago supported tropical soils and vegetation like that of central America, and the advent of temperate climate and deciduous forests goes back 33 million years. The rise of grassland vegetation over the past 20 million years is also revealed in Oregon. Richly organic grassland soils coevolved with grazing mammals to sequester carbon in anticipation of the Pleistocene ice age. Carbon farming aims similarly to enlist soils and livestock to curb modern global warming.