The furrows between his eyes deepened as his brows drew down further.
Numerous old river valleys and furrows entrenched in.
The furrows between his brows deepened.
Rapidly leaping the furrows, he fled across the field with the impetuosity he used to show at catchplay, now and then turning his good-natured, pale, young face to look back.
The very finest sediment is kept in a state of movement until it drops into the gulleys or furrows of the shelf, where it can come to rest together with the finer fragments of the remains of littoral or bank vegetation.