A team of archaeologists in Orange County, Virginia use #groundpenetratingradar to find slave burials: http://www.nbc29.com/story/39594787/archeologists-scan-montpelier-for-potential-slave-grave-sites … #utilityscan #gssi #gpr #georadar
source https://twitter.com/GSSI_GPR/status/1071060465072123909
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