CLASSIFICATION OF ORE DEPOSITS. 49 



II. Stratified. 



(a) Forming entire strata. 



(b) Disseminated through strata. 



(c) Segregated from strata. 

 III. Unstratified. 



(a) Eruptive masses. 



(b) Disseminated through eruptive rock. 



(c) Contact deposits. 



(d) Stockworks. 



(e) Fahlbands. 

 (/) Chambers. 

 (g) Mineral veins. 



1. Gash veins. 



2. Segregated veius. 



3. Bedded veins. 



4. Fissure veins. 



(12) 



J. A. Phillips, Ore Deposits, 1884. 

 I. Superficial. 



(a) By mechanical action of water. 



(b) By chemical action. 

 II. Stratified. 



(a) Deposits constituting the bulk of metalliferous 



beds formed by precipitation from aqueous 

 solution. 



(b) Beds originally deposited from solution but sub- 



sequently altered by metamorphism. 



(c) Ores disseminated through sedimentary beds, in 



which they have been chemically deposited. 

 III. Unstratified. 



(a) True veins. 



(b) Segregated veins. 



(c) Gash veins. 



(d) Impregnations. 



(e) Stockworks. 

 (/) Fahlbands. 



(g) Contact deposits. 

 (h) Chambers or pockets. 



1.06.09. It is at once apparent that Whitney's scheme contains 

 the essentials of the others, which are merely slight modifications. 

 Xewberry introduces impregnations, chambers, and bedded veins. 



