The Story in Rocks: Geology with Sarah West
The Schuylkill Center for Environmental Education 8480 Hagy's Mill Road, Philadelphia, Pennsylvania, Select a Country:The Wissahickon’s dramatically beautiful rock formations—huge banded gneiss formed deep underground, garnet-studded schist that grace the foundations of so many homes—tell a great story of continents crashing into each other, mountains rising and falling, and time slowly revealing the Earth’s...