CLASSIFICATION OF ORE DEPOSITS. 45 



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B. von Cotta, idem, p. 80. According to Shape and Position. 

 I. Wahre, einfache Spaltengange (Fissures). 



(a) Querdurchsetzende, Cross fissures. 



(b) Lagergange, Bed veins. 



(c) Kliifte (Cracks), Adern (Yeinlets). 

 II. Gangziige (Linked Veins). 1 



III. Netzgange (Reticulated Veins). 



IV. Contaktgiinge (Contact Veins). 

 V. Lenticulargange (Lenses). 



VI. Stockformige Gange (Stocks, Masses). 



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 B. von Cotta, idem, p. 80. According to the texture of the 



vein filling. 



I. Dichte Gange (Compact Veins). 

 II. Krystallinische Gange. 



III. Krystallinisch, kornige (granular) Gange. 



IV. Krystallinisch, massige (massive) Gange. 



V. Gange mit Lagentextur (Banded veins). 



(a) Ohne Symmetric der Lagen (unsymmetrical). 



(b) Mit Symmetric der Lagen (symmetrical). 

 VI. Gange mit Breccien oder Conglomerattextur. 



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J. Leconte, Amer. Jour. Sci., July, 1883, p. 17. 



1. Fissure Veins. 



2. Incipient Fissures, or Irregular Veins. 



3. Breceiated Veins. 



4. Substitution Veins. 



5. Contact Veins. 



6. Irregular Ore Deposits. 



1.06.05. In Von Weissenbach's table the sedimentary veins 

 are much the same as the " sandstone dikes " which J. S. Diller 

 has recently described. (Bull. Geol. Soc. Amer., I. 411.) They 

 and the stalactitic veins have small practical value, although of 

 great scientific interest. Under (d), the stockworks with tin ores 



1 Gangziige is happily translated "linked veins," by Mr. G. F. Becker 

 (Quicksilver Deposits, p. 410). Any attempt to render the original by 

 preserving the figure of a flock of birds or of a school of fish, etc., is, as 

 Mr. Becker remarks, infelicitous, if not impossible. 



