probab]} largely a fimclioTi of pabt events. These nrc j n I crticcs 

 however, and arc not directly substantiated by the r'-ult ^' iM- 

 study. 



3. The shore-ramp boundary uas j,',ei-:erri lly not at the ; ., ue[.t'i 

 as the depth at wliich sliorc-]un al 1 el (.(uiinurs cease 



28 



