The Naturalist in Nicaragua |
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Page 68
... rocks - Gold- mining - Auriferous quartz veins - Mode of occurrence of the gold -Lodes richer next the surface than at lower depths - Excavation and reduction of the ore - Extraction of the gold- " Mantos " - Origin of mineral veins ...
... rocks - Gold- mining - Auriferous quartz veins - Mode of occurrence of the gold -Lodes richer next the surface than at lower depths - Excavation and reduction of the ore - Extraction of the gold- " Mantos " - Origin of mineral veins ...
Page 76
... rocks , and that even some of the trappean dykes themselves are auriferous.3 Several years ago , I endeavoured to show that mineral veins in granitic districts occurred in regular sequences , with certain intrusive rocks , as follows ...
... rocks , and that even some of the trappean dykes themselves are auriferous.3 Several years ago , I endeavoured to show that mineral veins in granitic districts occurred in regular sequences , with certain intrusive rocks , as follows ...
Page 79
... rocks and various chemical re- actions , has effected a re - arrangement of the mineral contents of the strata , so that by molecular movements , the meta- morphic crystalline rocks , including interstratified granites and greenstones ...
... rocks and various chemical re- actions , has effected a re - arrangement of the mineral contents of the strata , so that by molecular movements , the meta- morphic crystalline rocks , including interstratified granites and greenstones ...
Contents
CHAPTER I | 3 |
Commence journey up San Juan riverPalms and wild canes | 13 |
CHAPTER III | 27 |
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The Naturalist in Nicaragua: A Narrative of a Residence at the Gold Mines of ... Thomas Belt No preview available - 2018 |
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amongst ancient animals ants Atlantic attacks beautiful beetles birds branches bushes butterflies carried cattle Central America Chontales colour continued couvade covered crossed dark Depilto dogs Ecitons feet flowers forest fresh-water fruit glacial period gold grass green Greytown ground hills humming-birds Indians inhabitants insects islands Jinotega Juigalpa lake land larvæ leaf leaf-cutting ants leaves Libertad live lodes longicorn look maize Masaya Matagalpa Mexico miles mines mountain mules Nahuatls natives natural nearly nest Nicaragua night numerous o'clock Ocotal passed plains plants prey probably quartz quartz veins rain range reached resemblance Rio Frio river road rocks rocky San Ubaldo Santo Domingo savannahs seen side slope soon Spaniards species spiders steep stones surface Teustepe told Totagalpa town trachyte travelling trees tropical America valley variety vegetation Velasquez wasp whilst wings yellow