The Naturalist in Nicaragua |
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Page 76
Mr. David Forbes , in his account of the geology of Peru and Bolivia , has
advanced the opinion that auriferous quartz veins belong to two different systems
, one occurring in connection with Granitic , the other with Diorytic intrusive rocks .
Mr. David Forbes , in his account of the geology of Peru and Bolivia , has
advanced the opinion that auriferous quartz veins belong to two different systems
, one occurring in connection with Granitic , the other with Diorytic intrusive rocks .
Page 77
Origin of Mineral Veins 77 plete gradation from veins of perfectly crystallised
granite , through others abounding in quartz at the expense of the other
constituents , up to veins filled with pure quartz , as at Porth Just , near Cape
Cornwall ; and ...
Origin of Mineral Veins 77 plete gradation from veins of perfectly crystallised
granite , through others abounding in quartz at the expense of the other
constituents , up to veins filled with pure quartz , as at Porth Just , near Cape
Cornwall ; and ...
Page 78
Quartz veins extend sometimes for miles , and it is necessary to suppose on the
hydro - thermal theory that the fissures remained open sufficiently long for the
gradual deposition of the veinstones , without the soft and shattered rocks at their
...
Quartz veins extend sometimes for miles , and it is necessary to suppose on the
hydro - thermal theory that the fissures remained open sufficiently long for the
gradual deposition of the veinstones , without the soft and shattered rocks at their
...
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Contents
CHAPTER I | 3 |
Commence journey up San Juan riverPalms and wild canes | 13 |
CHAPTER III | 27 |
15 other sections not shown
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America amongst ancient animals ants appear attacks beautiful beetles believe birds body branches brought called carried cattle Central America clear close colour common continued covered crossed dark distance excepting feet flowers followed forest four fruit glacial grass green ground growing head hills hundred Indians inhabitants insects islands lake land latter leaves less live look maize miles mines mountain mules natives natural nearly nest never Nicaragua night numerous origin passed period plains plantains plants probably protection quartz range reached reason resemblance rising river road rocks running Santo Domingo savannahs seen side sometimes soon species stones surface taken told town travelling trees tropical turned valley variety veins wasp whilst whole young
Bibliographic information
| Title | The Naturalist in Nicaragua |
| Author | Thomas Belt |
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