1 



c 



IGNEOUS ROCKS OF SCHEMNITZ. 



137 



Upper 

 Gallery. 



merates, or rather breccias, wherein fragments of trachyte 



are bound together by pumiceous tuff, or sometimes by silex. __ 



" It is probable that these rocks were permeated by the Wall - case 1 - 

 waters of hot springs, impregnated, like the Geysers, with 

 silica j or in some instances, perhaps, by aqueous vapours, 

 which liKe those of Lancerote, may have precipitated 

 hydrate of silica. 



"It appears from the species of shells collected principally 

 by M. Boue, and examined by M. Deshayes, that the fossil 

 remains imbedded in the volcanic tuffs, and in strata 

 alternating with them in Hungary, are of the Miocene 

 type, and not identical, as was formerly supposed, with the 



fossils of the Paris basin." ^ — 



43. 



from the trachytes of the GlashUtte. 



felspa 



nents of Geology.") 

 quartz, and mica, 



44 — Basalt. 

 45, 



'/ 



•Basalt, containing a very small quantity of olivine. 

 Giesshiibl. 



46.— Amygdaloidal basalt, the kernels filled with zeo- 

 lite and calc spar. 



47— Basalt, enclosing fragments of trachyte and a zeo- 

 litic mineral, from the west edge of the basaltic mass of 

 Giesshiibl. 



48. 



Compact pearlstone, from the western extremity 



of Hlinik 



49— Grey porphyritic pearlstone, composed of crys- 



base. 



sij felsp 



fHh 



50— Porphyritic pearlstone, another variety. 



5 1 . — Porphyritic pearlstone. 



52.— Pearlstone, with sphcerulite. ) GlashUtte. 



Two miles west of 



53. 



Pearlstone, with sphcerulite and specks of black 



mica, some in crystals. 

 Hlinik. 



of 



54.— Pearlstone, with a few small specks and lamina? 



of black mica. (« Perlite Retinique" of Beudant. 



of Hlinik. 



Vale 



