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Figure 1 . Location and vicinity map 



Various views of a dolos armor unit are shown in Figure 6. Initial model experi- 

 ments of the unit were performed by the South African Council for Scientific 

 and Industrial Research in 1965 and indicated that dolosse had a stability coeffi- 

 cient higher than other armor units (Merrifield 1974). Subsequently, other labo- 

 ratories, including the Corps of Engineers, experimented with dolosse and 

 verified that they were more stable than natural stone and other existing concrete 



Chapter 1 Introduction 



