Figure 1
From: The response of zircon to the extreme pressures and temperatures of a lightning strike
copyright-free data, i.e. shapefiles, from the US Census Bureau (https://catalog.data.gov/dataset).
Map showing the location of sampling site for the York County fulgurite. In (c), black lines denote major roads (including Interstate-83) and blue lines denote major waterways. Maps created in QGIS version 2.0.1-Dufour (https://qgis.org), using
