The southwestern corner of Wisconsin is a geologic curiosity.
In such classification the geologic factors are more important.
This is accomplished by geologic and topographic mapping of the surface.
Just as minerals may be grouped by provinces, they may be grouped by geologic ages.
Field work is an essential part of any course of geologic training.
The distribution of forest and prairie is due to geologic causes.
"It is," he agreed, and waited, boring his company with his geologic gaze.
Exactly this principle applies to any subdivision of geologic time.
The term “erosion” is one of the most important in geologic science.
What, then, are the laws of succession of organic forms in geologic times?