The Naturalist in Nicaragua |
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Page 74
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
Sedimentary strata have been carried down , by movements of the earth's crust ,
far below the surface , covered by other deposits , and subjected to great heat ,
which , aided by the water contained in the rocks and various chemical reactions
...
Sedimentary strata have been carried down , by movements of the earth's crust ,
far below the surface , covered by other deposits , and subjected to great heat ,
which , aided by the water contained in the rocks and various chemical reactions
...
Page 199
The Laurentian Formation 199 got higher and steeper , the soil more sandy and
barren , with scattered pine trees growing amongst the rocks . Great , bare ,
rounded masses of hard quartzite protruded through the scanty soil , and in the
river ...
The Laurentian Formation 199 got higher and steeper , the soil more sandy and
barren , with scattered pine trees growing amongst the rocks . Great , bare ,
rounded masses of hard quartzite protruded through the scanty soil , and in the
river ...
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