Mud 



If sediment is mud (cohesive) 

 this provides a lower bound for 

 a normally consolidated 

 sediment. 



If site is near river mouth, 

 Miss., Nile, Amazon, etc., mud 

 probably underconsolidated 

 (Young - not yet in equilibrium 

 with wt overlying soil, may be 

 limited strength buildup with 

 depth. Consult an expert for 

 design advice. 



Much of the nearshore is 

 overconsolidated (greater past 

 overburden than presently exist- 

 ing) usually a desirable anchor- 

 ing situation. Locations (e.g., 

 glaciated areas , high current 

 areas, tops of rises, passages). 



Unsually strong overconsoli- 

 dated sediment could lead to 

 less conservative design (long- 

 term loading) . 



2. Deep Ocean (Pelagic) Sediment Properties 



If deep ocean site is not an abyssal plain, determine if depth is 

 above or below Calcite Compensation Depth (CCD) . 





A3 





•pply to flKHi of the nnmcn loih 



OecanoMlly •eikcr <p<MHbty mch 

 ■nkn) proTiln miy be found aeu 









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. 









T1>bc>r.«Mt>«.d*ntniief 







y irpinltofi 



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•,„ . 1!0 k,/™,' ., m ,<, «« V' .HO » 



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Ik,/.' 



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145 fcrto.^ 



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Topography of the calcite compensation depth (CCD). Calcareous sediments are found 

 only in those locations where actual water depth is less than the CCDi numbers on 

 contours denote kilometers below sea surface 



