Hickory Run Boulder Field
It’s not something you see every day: a field of boulders spanning 16.5 acres (6.7 ha). How they got there is a tale involving ice, water, rock, frozen soil and gravity.
Amazing But True!
- The jumble of boulders is loosely packed.
- Most are fairly small, less than 4-feet in diameter, but some are 25-feet long.
- The rock in the northern half of the field is red sandstone and in the southern portion is red conglomerate with white quartz pebbles.
- The rocks are fractured in a block-like pattern; they are rounded at the west end and angular boulders towards the east.
With the links below, learn more about the Hickory Run Boulder Field. Then answer the following questions.
- Science Friday, This Field Rocks (video): http://www.sciencefriday.com/video/05/13/2010/this-field-rocks.html
- Hickory Run State Park, Boulder Field (brochure): http://www.dcnr.state.pa.us/cs/groups/public/documents/document/dcnr_015931.pdf
- What features in the sandstone allowed it to break apart?
- How did water cause the rock to break up?
- How did the rocks move?
- Did mechanical weathering, chemical weathering or both play a major role in creating the boulder field?