Fossil pollen dating
In addition to the many plant and animal fossils in the paleontological collections, the Illinois State Museum is home to the North American Fossil Pollen Database.
Scientists contribute pollen data from study sites throughout North America to add to this body of information.
As the database grows, we can learn more and more about past environments.
Fossils are the remains of ancient plants and animals.
CATEGORY: technique DEFINITION: Absolute pollen counting is the determination of the number of grains of each pollen type per unit weight (grains/gram) or unit volume (grains/cm3) of sample.
Variation in the rate of sedimentation sometimes makes the number of years represented uncertain; absolute counts for different samples may therefore not be compatible.
In the past 150 years they have not found any fossils that Darwin would not have expected.
Glacial geologists dated the wood from these trees to learn more about the timing of this event.