MODE III. BASALTIKT. f \ 



basaltin often presents little cavities, lined with 

 chalcedony, and quartz crystals ; sometimes filled 

 with green steatite, calcareous spar, zeolite, or a 

 lithomarga, resembling semiopal. Small grains of 

 olivine also occur, and dots of siderite, or perhaps 

 augite. The pillars are used for many useful and 

 ornamental purposes of architecture ; an example 

 which might be followed in other basaltic coun- 

 tries, with a sacred regard however to the more 

 regular, grand, and conspicuous parts. 



Columnar basaltin, from Italy, Sicily, Auvergne, 

 Hungary, Bohemia, Saxony, Lusatia, Thuringia, 

 Hessia, Goetingen, Nassau, in Germany; from 

 the isle of Bourbon, New Zealand, and other isles 

 in the South Sea, &c, &c. The columns are often 

 so small as to be chosen as specimens. 



Aspect 2. Mingled. Columnar basaltin, min- 

 gled with zeolite, from many countries. 



With nodules of steatite, calcareous spar, chal- 

 cedony, lithomarga, olivine, &c. from Stolpen, and 

 other places. 



