The James River Park System - Richmond, VA

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South Geology Tour

Stop 1: Time to Rock

[Lat/Long Coordinates: 37.524189 N, 077.457133 W] To orient yourself, use the google map below.

Or you may skip map

DIRECTIONS: Start in the northeast corner of the 22nd St. Parking lot below the stone staircase. Face the parking lot.

Geologic Time: Eons, Eras, and Periods

How old is the earth?
The 100 meter long (328-ft) parking lot represents earth’s age. At this scale, human presence is less than the thickness of a human hair!

Scientists estimate:

  • The earth formed about 4.5 billion years ago.
  • Life began 3.6 billion years ago
  • The age of the rock in the Fall Zone is about 330 million years old
  • Homo sapiens (humans) evolved 0.1 MYA (MYA=Million Years Ago)

geologic time graph

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