Today's Hours: 10 AM to 5 PM

Granite with Basalt Dike

Basaltic magma intruded into a fracture in the pink granite of the Webhannet Pluton. Thus, the basalt is younger than the granite. This is an example of a crosscutting relationship that geologists use to determine the sequence of geologic events.

Location: Bald Hill Quarry, Wells, York County

Gift of Millennium Granite Quarry and Stoneworks

Specimen Sponsorship: $7,500

granite with basalt dike

Join Our Newsletter

Discover the magic of minerals and gems! Subscribe to our newsletter below.