Scenery, Science and Art: Being Extracts from the Note-book of a Geologist and Mining EngineerJ. Van Voorst, 1854 - 323 páginas |
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Página 4
... quantity has been got from numerous shallow pits opened on the crop of some one of the seams , and following the coal down till the pit has fallen in . It is supposed that scarcely any shafts have been sunk more than about 100 fathoms ...
... quantity has been got from numerous shallow pits opened on the crop of some one of the seams , and following the coal down till the pit has fallen in . It is supposed that scarcely any shafts have been sunk more than about 100 fathoms ...
Página 4
... quantity has been got from numerous shallow pits opened on the crop of some one of the seams , and following the coal down till the pit has fallen in . It is supposed that scarcely any shafts have been sunk more than about 100 fathoms ...
... quantity has been got from numerous shallow pits opened on the crop of some one of the seams , and following the coal down till the pit has fallen in . It is supposed that scarcely any shafts have been sunk more than about 100 fathoms ...
Página 5
... quantity , taken for the use of Nantes and various towns in Brittany accessible by water carriage . It is however difficult , if not im- possible , to decide whether a very greatly increased supply would be met by a corresponding demand ...
... quantity , taken for the use of Nantes and various towns in Brittany accessible by water carriage . It is however difficult , if not im- possible , to decide whether a very greatly increased supply would be met by a corresponding demand ...
Página 13
... of the different seams is generally a grit of tolerable hardness , and standing well without timbering . The floor is also generally of the same nature . Over the roof is a large quantity of COAL AND IRON OF AVEYRON . 13.
... of the different seams is generally a grit of tolerable hardness , and standing well without timbering . The floor is also generally of the same nature . Over the roof is a large quantity of COAL AND IRON OF AVEYRON . 13.
Página 14
... quantity of pyritous shale , which occasionally burns spontaneously for a long time , pro- ducing a singular appearance , not unlike that which may be seen sometimes near Newcastle , where the slack or small coal is left in heaps at the ...
... quantity of pyritous shale , which occasionally burns spontaneously for a long time , pro- ducing a singular appearance , not unlike that which may be seen sometimes near Newcastle , where the slack or small coal is left in heaps at the ...
Outras edições - Ver tudo
Scenery, Science and Art: Being Extracts from the Note-book of a Geologist ... David Thomas Ansted Visualização integral - 1854 |
Scenery, Science and Art: Being Extracts from the Note-book of a Geologist ... David Thomas Ansted Visualização integral - 1854 |
Scenery, Science and Art: Being Extracts from the Note-book of a Geologist ... David Thomas Ansted Visualização integral - 1854 |
Palavras e frases frequentes
abundant Algiers Alpujarras Amposta appears Aubin Aveyron bands basalt beauty beds Berja Cagliari chain character Cheliff Cherchel chiefly Chiffa coal coal-field coast coloured commenced considerable consists constructed copper crossing cultivated Délémont deposits distance district east Ebro elevation entering exist extending extremely feet France French gorge gossan granite ground hills houses inhabitants interesting interior island Kanawha kind labour land less limestone lode lofty Madrid Mediterranean miles mineral mines Moorish mountains Mouzäia natural nearly numerous obtained occasionally occupied Ohio oolite passing peculiar picturesque Pittsburg plains Porrentruy present principal Pyrenees pyrites quantity quartz range reached remarkable rich ridge rising river road rocks Rodez Roman Sahel sandstone Sardinia scenery schists seams seen shales side Sierra Nevada soon Spain Spanish stream surface Tarragona Tenez tertiary thickness tion town tract traveller valley various vegetation veins village walls whole
Passagens conhecidas
Página 292 - The ore in both cases is an auriferous pyrites, occurring in a whitish or white schist. The vein is worked at a depth of 90 feet or thereabouts, but has been proved to 160, and remains uniform. It yields about 6 dwts.