On Sunday, June 25, my ecology class visited the Wissahickon Valley Park, situated in northwest Philadelphia along the Wissahickon Creek. The park is located in the Upland Piedmont region of the Piedmont province; the creek runs through a gorge characterized by schist and gneiss, crystal-flecked metamorphic rocks used for building materials in many historic structures… Continue reading Walking the Wissahickon
Sara Davis 