APPENDIX D 

 CONSTITUENT ANALYSIS 



This appendix contains data concerning the mineralogical character 

 of sediments from the study area. Table D-1 lists the frequency of 

 occurrence of the more readily identifiable constituents from selected 

 samples of the main lithologic types described in Section III. The 

 samples were examined by obtaining a small split which was then dispersed 

 on a gridded paper for analysis. Frequency was determined by placing the 

 paper under a light microscope and counting the various constituents 

 (1,000 particles) in randomly selected grid squares. Large fragments 

 such as whole shells were removed from the splits before counting so the 

 frequency data pertain to sample material smaller than 2-millimeter sieve 

 diameter. 



Roundness and sphericity were determined for 300 quartz grains in 

 randomly selected squares by comparison with a roundness and sphericity 

 chart in Krumbein and Sloss (1963, p. 111). 



Table D-2 presents the results of acid digestion of carbonate elements 

 in selected samples using dilute hydrochloric acid. The table shows the 

 percent by weight of material dissolved by the acid. A visual analysis 

 of sediment constituents indicates that the acid soluable elements consist 

 almost entirely of biogenic calcium carbonate. 



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