The Geology And Ore Deposits of the Bully Hill Mining District
The Geology And Ore Deposits of the Bully Hill Mining District
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In our eReader you can find the full English version of the book. Read The Geology And Ore Deposits of the Bully Hill Mining District Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Geology And Ore Deposits of the Bully Hill Mining District
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Of economic significance are the nearly vertical foliation planes and the cracks along which ore-bearing solutions have deposited ores in notable amounts.
The time of the intrusion is not definitely known, but since the FIG. 6. VIEW SHOWING THE RUGGED CHARACTER OF THE ALASKITE-PORPHYRY.
country rock is believed to have accumulated in Middle Triassic time, it follows that the intrusion is as young at least as the late Triassic.
Andesitic Intrusion. A later intrusive of decidedly andesitic affini...ties, mostly decomposed to a reddish brown exfoliated mass, is exposed on the south slope of Bully hill and extends in a more or less continuous mass in a northerly direction for a distance of 0. 75 mile. Because of the readiness with which this dike rock alters, it is mostly obscured, and at times it is difficult to distinguish it from the country rock through which it passes. Were it not for the exposures in ravines and gulches one would notice little difference between this rock and the normal weathered country rock.
What to read after The Geology And Ore Deposits of the Bully Hill Mining District?
You can find similar books in the "Read Also" column, or choose other free books by Albert C Albert Clarence Boyle to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Of economic significance are the nearly vertical foliation planes and the cracks along which ore-bearing solutions have deposited ores in notable amounts.
The time of the intrusion is not definitely known, but since the FIG. 6. VIEW SHOWING THE RUGGED CHARACTER OF THE ALASKITE-PORPHYRY.
country rock is believed to have accumulated in Middle Triassic time, it follows that the intrusion is as young at least as the late Triassic.
Andesitic Intrusion. A later intrusive of decidedly andesitic affini...ties, mostly decomposed to a reddish brown exfoliated mass, is exposed on the south slope of Bully hill and extends in a more or less continuous mass in a northerly direction for a distance of 0. 75 mile. Because of the readiness with which this dike rock alters, it is mostly obscured, and at times it is difficult to distinguish it from the country rock through which it passes. Were it not for the exposures in ravines and gulches one would notice little difference between this rock and the normal weathered country rock.
What to read after The Geology And Ore Deposits of the Bully Hill Mining District?
You can find similar books in the "Read Also" column, or choose other free books by Albert C Albert Clarence Boyle to read onlineMoreLess
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