106 



Microfossil Mean Relative Abundance 

 by Layer 



D Freshwater, the. 

 DMarsh.ag. 

 DMudflat.cal. 

 ■ Shelf.ag. 

 HShelf.cal. 



100 



S 80 



c 

 re 



1 60 



3 



1 40 



> 



I 20 







CDM 

 No. of Samples 17 

 Survey Postcap Core 



" 





1 





— \ — 









i 







^ 













i*l^ 





1 — 



wm 



-A 



Pseudo-UDM 

 19 



Postcap Core 



Pseudo-UDM 

 9 

 Pre cap Grab 



AMB 

 5 

 Postcap Core 



Mean No. per Gram 

 by Layer 



150 



100 



50 











149.4 









101.5 942 













lathecam./gr 

 nporam./gr. 

























4.8 



18.7 



— 1 — M- 



13.0 



1 rill 





2.0 



L_| <=f=J 



10 





B 



CDM Pseudo-UDM 



No. of Samples 17 19 



Survey Postcap Core Postcap Core 



Pseudo-UDM AMB 



9 5 



Pre cap Grab Postcap Core 



Figure 4-29. Histograms comparing the mean relative abundance and density of 

 microfossils m the sediment samples analyzed as part of the Portland 

 Disposal Site Capping Demonstration Project 



The Portland Disposal Site Capping Demonstration Project, 1995-1997 



