10 



MARINE BOTTOM SAMPLES OF LAST CRUISE OF CARNEGIE 



Table A. Summary of characteristics and composition of 



Physical composition 



Organic constituents in per cent 

 CaC03, maximum 



Minimum 



Average 

 Pelagic foraminifera, maximum 



Minimum 



Average 

 Benthonic foraminifera, maximum 



Minimum 



Average 

 Other calcareous remains, maximum 



Minimum 



Average 

 Siliceous remains, maximum 



Minimum 



Average 

 Inorganic constituents in per cent 



>0.05 mm diameter, maximum 



Minimum 



Average 



<0.05 mm diameter "fine washings' 



Maximum 



Minimum 



Average 



No. of samples averaged 



16 



Number of samples in which substance is recorded 



Principal inorganic constituents other than 



clay minerals, hydroxides, and colloidal 



silica 

 Allogenic minerals 

 Amphibole^ 

 Chlorite 

 Epidote 

 Feldspar, undifferentiated 



orthoclase^ 



sanidine 



plagioclaseS 

 Garnet 

 Magnetite 

 Mica, undifferentiated 



white mica 



black mica** 

 Olivine 

 Pyroxene, undifferentiated 



enstatite 



hyper sthene' 



augite 

 Quartz 

 Tourmaline 

 Zircon 



Authigenic minerals 

 Analcite 

 Glauconite 



Manganese grains, nodules 

 Palagonite 

 Phillipsite 



