Not until recently has the mid-Atlantic Piedmont region of the Appalachians been viewed from plate tectonic theory. Eight papers derived from 1995 and 1997 symp

Grasses are among the most ubiquitous plants on the planet. They inhabit a wide geographic range and are found in a variety of natural habitats. The small parts

This is the most comprehensive and up-to-date guide to the wildlife of Pennsylvania, New Jersey, Delaware, Maryland, Virginia, and West Virginia. Approximately