1.   The first is to look for geological records of ancient tsunamis in coastal areas throughout the world.

2.   A geochemist, Berner studies the geological record through such methods as silicate rock weathering.

3.   He also has analyzed the geological record to help him understand the role of asteroids and comets in delivering organic molecules to the surface of the early Earth.

4.   They might have left evidence of their passing in the geological record.

5.   He said phased cycles of extinction, as evidenced in the geological record, are compatible with a massive, prolonged flood of molten basalt.