The chronologically earliest period of time named for this specimen came after the Weichselian, and corresponds to the 1a pollen zone.
A 1989 Dansgaard et al. study used ice cores in Greenland to show that a period of time named for this thing was characterized by a 6 degree Celsius temperature change; that period named for this specimen was once thought to have been caused by an eruption at Lacher See. The chronologically earliest period of time named for this specimen came after the Weichselian, and corresponds to the 1a pollen zone. This specimen gives its name to an (*) impact hypothesis that suggests an asteroid destroyed the Clovis Culture. A period of time named after this specimen reversed the climate induced by the Allerod oscillation, lasted for around 200 years, and occurred between two interglacials. Three stadials are named after, for 10 points, which alpine plant whose "Younger" type names the most recent such period in the Quaternary?
A 1989 Dansgaard et al. study used ice cores in Greenland to show that a period of time named for this thing was characterized by a 6 degree Celsius temperature change; that period named for this specimen was once thought to have been caused by an eruption at Lacher See.
Dryas [prompt on plant or flower before it is mentioned]