How cunningly nature hides every wrinkle of her inconceivable
antiquity under roses and violets and morning dew!

- Ralph Waldo Emerson


Key words or concepts:
Kaskaskia Sequence
Oriskany, overlaid by
Devonian Black shales
oil shales as an energy resource
Orogenies
Acadian Orogeny
Ouachita Orogeny
Antler Orogeny

Useful links:

Earth Science Picture of the Day

Return to Historical Geology syllabus


Return to Historical Geology syllabus