1. What is the difference between Rescue Archaeology and proble
... conditions can produce good results when snow and frost met more slowly in hollows and therefore show up as white marks on the open ground. Soil marks are produced by different tones of sub-soil revealed by deep ploughing. Also they are created when ploughs hit buried building remains and drag up fragments of motar or other building material. Crop marks reveal ... buried features that are affecting the growth of the crop above them. A buried ditch cut through the sub-soil may hold more moisture that would benefit the crop, making it grow taller and ripen later ... a site has been locat...
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- Grade Level: Undergraduate