a close-up photograph of a stone surface with clear layers
illustration of mastodon silhouette with skeleton and a log hut

An Entrance to Former Worlds: the Cave, Landscape, and Geologic History of Valley Forge

Valley Forge National Historical Park

Special Event
  • Oct 17, 2026 at 1:00 PM
  • Free

An Entrance to Former Worlds: the Cave, Landscape, and Geologic History of Valley Forge

1 pm in the Meeting Room at Valley Forge

John A. Sime, PhD
Lecturer, University of Pennsylvania

This is a story about how five-hundred-million-year-old rocks, which formed beneath ancient seas, came to entomb five-hundred-thousand-year-old fossils, that recorded the demise of extinct land mammals.

In honor of the 17th anniversary of National Fossil Day, Valley Forge National Historical Park is celebrating the amazing Ice Age fossils of Valley Forge with a day of interactive, family-friendly activites and special programs.

More information

Fees

This event is free to attend.

Location

The Meeting Room at Valley Forge is located next to the upper doors of the Visitor Center at Valley Forge.

Latitude and Longitude 40.101349, -75.422833

Schedule

Date:

Oct 17, 2026

Time:

1:00 PM

Duration:

1 hour

Contact Information

Sean Walsh-Haehle
610 783-1099
Contact Us

Event Type

  • Talk
Tags: valley forge, fossil day, geology talk