Franklin Township
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Franklin Township - Township These two mine shafts are the only such openings remaining in this area that represents the once major copper district. A number of copper mines are found in this region and was one of the leading copper districts in the United States in the late 1800ís into the early 1900ís. This is the Reed Hill Mine along Copper Run. Many of the abandoned mines are now on the property of Michaux State Forest.
 
Franklin Township - A sample of native copper in quartz found within the basalt in the Copper Run area north of Gladhill. Copper was mined from this area from the mid 1800ís into the early 1900ís. Many of the visible prospects are now on the property of Michaux State Forest.
 
Franklin Township - Township This is a classic example of a diabase dike intruding older rocks in the Balley Quarry at Fairfield. Diabase is an igneous rock formed inside the Earth. A crack in the crust allowed the magma to migrate up through the limestone to fill in the fracture. The dike is about 15 feet wide.
 
Franklin Township - The age of the limestones in the Valley Quarry at Fairfield has been debated for some years. Some geologists thought the limestone correlated with the Early Paleozoic e limestones in the Great Valley under Hagerstown, MD and Chambersburg. Others thought the rock was Triassic in age, matching those rocks surrounding Fairfield. In 2011, members of the Franklin County Rock and Mineral Club discovered dinosaur footprints while on a fieldtrip to the quarry. This is a Grallator footprint. This find placed a Triassic age on the age exposed in the quarry.
 

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