OUTLINF.s Ol FIELD 



1 



Uralite . . . II. A mineral having the crystalline form 

 of augite but the mi' ; irons 



character of hornblende, with some- 

 times a eentr.il core of still unaltered 

 augite. In some old |'. i]. 1 

 Urals, Norway, Alp* 



I. A constituent of the rock called eclogUe 

 and some forms of gabbro. 



Talc .... I. Abundant among foliated rocks, some 

 of which (e& talc-schisi) consist 

 largely of it. 



II. As an alteration-product among crys- 

 talline rocks. 



Chlorite ... I. Constituting almost the whole of the 

 rock termed chlorite-slate, and found 

 among other foliated and crystalline 

 rocks. 



II. Frequent as an alteration - product in 

 rocks containing hornblende, augite, 

 olivine, or other anhydrous magnesian 

 silicate. 



I. Constitutes entire rock - masses, but 

 Serpentine . . these appear in all cases to have been 



originally anhydrous, often olivine- 

 rocks. 



II. Frequent as an alteration-product, par- 

 ticularly in rocks containing olivine. 



Delessite . . ^ II. Alteration-products in crystalline rocks, 

 especially volcanic masses rich in mag- 



Saponite . . \ nesian silicates ; occur in kernels filling 



cavities, as incrustations round nod- 



(Celadonite) J ules, or in irregular veinings and 



blotches. 



Glauconite . . II. Abundantly diffused through some sand - 



(Silicate of stones and limestones ; found also as an 



Iron and alteration - product among many old 



Potash. ) augitic and hornblendic volcanic rocks, 



lining cavities or running in threads 



through the altered mass. 



