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Books Bücher 1 - 5 von 5 in ... particle of evidence to sustain the theory which has been so often brought forward,...
" ... particle of evidence to sustain the theory which has been so often brought forward, that all, or even a portion of the auriferous rocks are older than the Carboniferous, not a trace of a Devonian or Silurian fossil ever having been discovered in California.... "
Palæontology - Seite xviii
1864 - 299 Seiten
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The American Journal of Science and Arts

1864
...gold being chiefly limited to Silurian rocks, that this metal occurs in no inconsiderable quantity in metamorphic rocks belonging as high up in the series as the Cretaceous. Allusion has already been made to the wide-spread occurrence in California of the Cretaceous formation....
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The American Journal of Science and Arts

1864
...gold being chiefly limited to Silurian rocks, that this metal occurs in no inconsiderable quantity in metamorphic rocks belonging as high up in the series as the Cretaceous. Allusion has already been made to the wide-spread occurrence in California of the Cretaceous formation....
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Geological Magazine, Band 2

1865
...Indeed, gold, instead of being chiefly limited to Silurian rocks, occurs in no inconsiderable quantity in Metamorphic rocks belonging as high up in the series as the Cretaceous group (see also p. 330). With regard to the detrital auriferous deposits, they consist of materials...
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The Mississippi Valley: Its Physical Geography, Including Sketches of the ...

John Wells Foster - 1869 - 443 Seiten
...Silurian fossil ever having been discovered in California. or indeed any where to the west of the n6th meridian. It appears, on the other hand, that no inconsiderable...belonging as high up in the series as the Cretaceous.* While such are the generalizations of Whitney as to the age of the auriferous rocks of the Sierra Nevada,...
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The Mississippi Valley: Its Physical Geography, Including Sketches of the ...

John Wells Foster - 1869 - 443 Seiten
...Silurian fossil ever having been discovered in California, or indeed any where to the west of the n6th meridian. It appears, on the other hand, that no inconsiderable...obtained from metamorphic rocks, belonging as high up in Ihe series as the Cretaceous.* While such are the generalizations of Whitney as to the age of the auriferous...
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