Figure 20.
GPR B-scans for the north aisle (survey B): (a) B-5; (b) B-35; (c) B-143.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.