Geophysical application to archaeology has been part of research at the GBL for almost 50 years.  In fact, Glenn Black conducted the very first magnetic survey on an archaeological site in North America at Angel Mounds site in 1962.  More recently, the lab’s research fellow Staffan Peterson has continued this work completed the magnetic survey of the entire Angel site.  Over the past decade, the GBL has expanded its geophysical expertise and experience to include all the major types of geophysical commonly employed on sites, including magnetometry, Electrical Resistivity and Conductivity (ER and EC), ground penetrating radar (GPR) as well as borehole geophysics.  These have been applied to a variety of sites types, including large prehistoric villages and small encampments as well as historic pioneer cemetery sites, throughout the Midwestern USA.  The GBL has one of the most extensive lists on geophysical equipment of any firm or research organization in the Midwest region and also has broad research experience in their application to archaeological studies.