Geoscience Reference
In-Depth Information
determine exactly where a fossil species disappeared. Their initial
response was to rely on the data already collected, and their prior
interpretations of it, but those soon proved inadequate to provide a
proper test. Paleontologists returned to the field to collect the much
larger sample fossil databases that were required to probe the Alvarez
theory. Gradually, enough data became available to allow researchers
to test in detail its predictions for mass extinction.
