This guidebook features field trips at the joint meeting of GSA's Northeastern and Southeastern Sections in Baltimore, Maryland, in March 2010. Chapters in this guide range from the lowlands of eastern Pennsylvania to the highlands of northeastern West Virginia. Four physiographic provinces are covered: Piedmont (Piedmont Upland and Gettysburg-Newark Lowland Sections), Blue Ridge, Valley and Ridge, and Appalachian Plateau. The geologic foci are likewise variable, ranging from Precambrian basement rocks to Pleistocene sediments.

The Appalachian Mountain chain to which the Appalachian Trail is anchored are America's classic mountains, featuring pieces of almost every major geological event in Earth's history. This amateur geologist (a chemical engineer by occupation) walked the entire trail over a period of more than 10 years, looking at the manifestations today of events millions of years ago-through a hiker's eyes. This book, reviewed before publication by three top academics in the field, provides background on the development of the rocks beneath the hiker's feet, with layperson-friendly maps and photographs.

Many appreciate Richard P. Feynman's contributions to twentieth-century physics, but few realize how engaged he was with the world around him -- how deeply and thoughtfully he considered the religious, political, and social issues of his day. Now, a wonderful book -- based on a previously unpublished, three-part public lecture he gave at the University of Washington in 1963 -- shows us this other side of Feynman, as he expounds on the inherent conflict between science and religion, people's distrust of politicians, and our universal fascination with flying saucers, faith healing, and mental telepathy. Here we see Feynman in top form: nearly bursting into a Navajo war chant, then pressing for an overhaul of the English language (if you want to know why Johnny can't read, just look at the spelling of "friend"); and, finally, ruminating on the death of his first wife from tuberculosis. This is quintessential Feynman -- reflective, amusing, and ever enlightening.