The hundreds of millions of years of history folded within Pennsylvania's rocks tell a remarkable story of destruction, creation, and transformation. With an as

Maps, cross-sections, diagrams, photos, and text describe the geologic foundations of the state of New York.

Informative travel companions about roadside terrain and geology with photos, diagrams, and glossary.

From the sandstone ridges and shale valleys of western Maryland to the sand dunes and tidal estuaries on Delaware's coast, the geologic features of the Mid-Atla

With this informative guide, you can explore the mineral-rich regions of Pennsylvania and New Jersey, from the beaches to the mountains. It describes the states