6 chapter 9 jeffrey r keaton and jerome v degraff surface observation and geologic mapping 1 introduction basic tools and techniques needed in surface observation and geologic mapping include access ...
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...Chapter jeffrey r keaton and jerome v degraff surface observation geologic mapping introduction basic tools techniques needed in include access by assessing causes of factors contributing to existing information use topographic maps slope movement aerial photographs aircraft for re slopes provide the basis connaissance field site limited subsurface investigations engineering analyses hardware simple instruments ability that follow accurate interpretation observe interpret features caused a landslide can be used evaluate related instability some mode judge direction rate are described this estimate geometry slip relatively new have not received widespread exposure those well known should done on with active or inactive will mentioned context landslides no evidence past but discussed detail review more so evaluation phisticated survey technology applicable land likelihood renewed slide evaluations is also included obtained through duties geologist particular extends utilizes knowledge ty...