 In case there was no time, or money during the finding of the site, archaeologists can come back and visit the site for further digging to find out the extent of the site.Archaeologist can also sample randomly within a given area of land as another form of conducting surveys.Surveys are very useful, according to Jess Beck, “it can tell you where people were living at different points in the past.” Geophysics is a branch of survey becoming more and more popular in archaeology, because it uses different types of instruments to investigate features below the ground surface.