Sentences with phrase «for ancient pollen»

Not exact matches

Paleoclimatologists have probed ancient silt for grains of crop pollen and charcoal from fires, for instance, in attempts to say definitively whether and when human beings were on the scene.

In the new study, pollen grains of a modern dwarf pine species, considered an analog for the ancient species, were similarly malformed under high levels of ultraviolet - B radiation (bottom row).

With the help of a graduate student, Williams will look for a kind of mammoth proxy: sporormiella, a fungus that lives in the dung of large herbivores, and grains of ancient pollen that can reveal what kind of vegetation once grew around the lake.