Geophysical Archaeology (also known as Archaeological Prospection) uses instruments such as ground-penetrating radar, magnetometry, resistivity, and conductivity to record information about below ground features without or before excavating. Geophysical archaeology data are often gathered using a grid system of survey units 20 m x 20 m with some recent advances using RTK-DGPS to rapidly collect data using RTVs to tow the instruments across the site. The instruments are moved along a transect (a straight line) while taking a reading every 2 cm or so. After reaching the end of the transect line the instrument is turned around and moved over 5 cm, 10 cm, 25 cm, or 50 cm and data are then collected while travelling back along this new line. Due to the dense sampling of data post-acquisition plots can reveal details about information of interest below the ground. Building foundations, road and walkways, storage pits, human graves, and locations where people had fires are just a few of the human-made sub-surface features that geophysical archaeology can identify.
![GPR and Magnetometer surveys at Rockaway](https://clas.ucdenver.edu/rogers-lab/sites/default/files/styles/large_wide_thumbnail/public/callout/rpce-raw-foto-100617-154.jpg?itok=tSlAWp_m)
Rockaway Presbyterian Cemetery, NJ
![Magnetometer survey at KAD](https://clas.ucdenver.edu/rogers-lab/sites/default/files/styles/large_wide_thumbnail/public/callout/kambe-raw-foto-080620-041.jpg?itok=PRGNeiqp)
Kalavasos and Maroni Built Environments Project, Cyrpus
![GPR Survey at Rose Hill](https://clas.ucdenver.edu/rogers-lab/sites/default/files/styles/large_wide_thumbnail/public/callout/img_1526.jpg?itok=hjjzXh5m)
Rose Hill Mansion, Geneva, NY
![Kevin Faehndrich conducting magnetometer survey at Gila Encantada site, NM](https://clas.ucdenver.edu/rogers-lab/sites/default/files/styles/large_wide_thumbnail/public/callout/p1010670.jpg?itok=ul7TX530)
Gila Encantada Village Site, NM
![Liquid Effluent being sprayed on fields at Oregon State University Research Dairy Farm](https://clas.ucdenver.edu/rogers-lab/sites/default/files/styles/large_wide_thumbnail/public/callout/odip-020404-foto-0009.jpg?itok=KAYLFsaS)
Oregon Drainage Infiltration Project, OR
![GPR survey at Liverpool Cemetery, NY](https://clas.ucdenver.edu/rogers-lab/sites/default/files/styles/large_wide_thumbnail/public/callout/img_2889.jpeg?itok=taTUReQo)
Liverpool Village Cemetery, NY
![Dyea Alaska](https://clas.ucdenver.edu/rogers-lab/sites/default/files/styles/large_wide_thumbnail/public/callout/dyea_groupshot_1.jpg?itok=jQneRuTV)