New Fagaceous pollen taxa from the Miocene Søby flora of Denmark and their biogeographic implications.
Thomas DenkJohannes M BouchalPublished in: American journal of botany (2021)
More northerly distributions during MCO and Eocene probably were determined by temperature. In contrast, fossil occurrences in areas that are arid or semi-humid today were determined by maritime conditions in these areas (western North America, Central Asia) during the Cenozoic.