Subsurface Laboratory Methods 



TABLE 3— Continued 

 Argillaceous material 



145 



Spongelike 



Clay 

 _J 



naky 



I 



Massive 



\/ 



Shale 



Unmodified Dolomoldic Oomoldic Oolitic 



Lacy 



Dolomorphic 



Skeletal Concentric 



Abundant Radiate 



Sandy 



Silly 



Fossiliferous 



Glauconitic 



Pyritic 



Scattered 



Sand-centered Micaceous 



Smooth 



I 

 Flaky 

 Waxy 

 Laminated 



Massive 



Other minerals 



Silt 



Arenaceous material 

 I 



Loose 



Consolidated 



Poorly 



Well 



I ~1 \ 1 



Fossiliferous Dolomoldic Oomoldic Oolitic 



Sandy \ / I 



Quartzose \ / I 



Glauconitic Abundant Concentric 



Pyritic Scattered Radiate 

 Micaceous 

 Other minerals 



Sand 



Loose 



1 



Consolidated 



Poorly 



Well 



_J 



Rounded Angular 



Subrounded Regenerated 



I 

 Frosted 

 Polished 



Sand-centered Etched 

 Massive 



Massive 



Anhydrite 



Fibrous 



Subhedral 



Fine, granular 



I ^ 



Subhedral Anhedral 



Coarse aggregates 



Anhedral 



Massive 



Gypsum 



Fibrous 



Selenitic 



Unclassified Accessory Residues 



Sulphur, pyrite, marcasite, sphalerite, millerite, magnetite, hematite, limonite, 

 feldspar, muscovite, biotite, chlorite, glauconite, barite, celestite, other insoluble min- 

 erals, fossils, pellets, beekite. 



