The little present must not be allowed wholly
to elbow the great past out of view

- Andrew Lang

Key words or concepts:
Relative Time
Absolute Time
Types of units
Time Units
eras
periods
epochs
age
Rock Units
groups
formations
member
Time/Rock units
not covered in any detail

Useful links:

Earth Science Picture of the Day
Strata Smith and the Geologic Map of England
Geologic Time Scale
Geologic Time Scale

Return to Historical Geology syllabus