|Geologic Time Scale
Geology means "study of the Earth." Perhaps most fundamental to
this endeavor is the concept of "geologic time." As our understanding
of the great antiquity of the Earth developed, names were assigned to segments
of time defined in units ranging from thousands of years (in the relatively
recent geologic past to historic times), to many millions or billions of years
(in the distant geologic past). Geologists use the geologic time scale to define
the ages of rocks, the processes that formed them, or the age of the fossils
they may contain.The geologic time scale (below) highlights selected "events"
relating to the New York City region.
Click here to see the most recently revised geologic time scale provided by the Geological Society of America.
|Figure 5. Geologic time scale for NYC region.