Dense, less than medium in which they lived 107 

 Denser than in nature 420 

 Densities, high and moderate 801 



, varying 537, 538 



Density, average 417 



, greatest 467 



, highest 1335 



/ in grams per square meter 19 30 



, increased 562 



/ large increases in 1904 



, lowest 1335 



i multiply total area by mean 778 



per acre 205 



square foot 244, 245, 500, 502, 507, 663, 664, 



meter 1237 

 yard 758 



_ studies 34, 35, 36, 49, 65 

 _-time relationship 538 

 vs substrate 1742 



Dentin 2156 



Deoxyribonuclease 20 83 

 Depauperate, particularly 1519 

 Dependence, ionic 2108 

 Dephosphorylation 2101 

 Depleted, totally 512 

 Depletion, recovery from 797 

 Deposit feeders 1069 



-feeding organisms 1539 



Deposition 159, 403 

 , increment 1797 



Depreciation 861 



























Depresses 709 



























Depressions covered 



with 



sediment 



502 



















Depth of aggregate 



380 

























burial 



2088 



85, 



371, 



133, 

 1433, 



101, 



413 



211, 

 1482, 



286, 



275, 

 2071 



337, 

 337, 



481, 

 400, 



519 

 414, 



423, 



621, 



677, 



717, 



781, 





burrowing 





clamming 





water 



827, 



1025, 1097, 1193, 



range/depth s- 



9R"7 7T/I 



tudies 



35, 



49, 



51, 



53, 



54, 



58, 



60, 



61, 



65, 



80, 



152, 



sampled 6 76 















Depths, considerable 





1025 











Depuration 71, 

 518, 570, 573, 



81, 

 583, 



140, 

 620, 



148, 

 787, 



174, 

 816, 



179, 

 817, 



246, 



886, 



1658, 1670, 1886, 1921, 2032, 2068 

 confidence in 1091 

 duration of 460 



247, 248, 249, 324, 356, 460, 

 887, 1016, 1092, 1214, 1552, 1656, 



675 



