Imagine yourself in an earth science class with emphasis on geology. Your class had been concentrating on characteristics of sedimentary rocks. The textbook had really neat pictures of sandstones, ripple marks and mudcracks which were indicators of sedimentary deposits.
On your local geology field trip to certain White Oak Mountain hardened sediments, the book illustrations became alive: here in a rock slab before you were distinct impressions of real mudcracks! You remembered having read that ancient mudcracks were naturally preserved irregular fractures caused by shrinkage of drying silt, clay or mud.
As a former teacher, I believe that well-organized field trips added fun to a student's learning.
Copyright © 2001–2002 William T. Hathaway.