CROSS-SECTION, NEARSURFACE GEOLOGY, 

 SEDIMENTS, AND HYDROLOGY 



^ 





PBE-CAHAL GONDII 



Trappers Ditch 



'i'iJIllfJJH' Trappers Ditch 



g \ 



;;:•■' -Root Mat U mM\ / W ' ma ' '"■' "•' ' '^ 



ft o- 



•5 - 



•10 



Isolated Pond 



Animal Runs 



,fc,i!W 



— 6 



— 3 



•v:MS:;:i;v: ; .^ 



^g MARSH DEPOSIT k\^f»o| 

 i.;^s5(peat & organic muck) Flit j^=" 



■•.-.•• NATURAL LEVEE.'. •.•;••.• /.■:: 



W^-^^^^^Wm^llllllilllllllllll/lllli^h- 



//////// 



— m 



_ -3 



'CHANNEL 



FILL 

 DEPOSITS 



I (clay, sand & silt) 



/////////////////// 



:/f3 POST-GANAl GONDII 



Tidal • /^ 

 Scour ^^ 



Ponds Interconnected 

 by Tidal Channels 

 Marsh 

 Mudflat Remnant 



Tidal 



Scour 



Channel 



.v.-MS&ft:]: 



:.:.-. NATURAL LEVEE f.v.v 

 •;•'.• (silt & clay) ;•;•;•'.•'. 



CHANNEL •;'•'••' 

 FILL ffl 

 DEPOSITS 



100 ft 



i i ■=. 



25 m 



■ ■ i i ■ i 



MARSH DEPOSIT 

 (peat & organic muck) 



Wlllllll 



BAY OR LAKE FILL 



// (clay, sand & silt) 

 ////////////////// 



VERTICAL EXAG. 5X 



OS Organic Sediment 

 MS Mineral Sediment 



Figure 10. Diagrammatic cross sections illustrating pre-canal and post-canal conditions in a 

 naturally impounded marsh. 



44 



