144 



VOLCANIC ROCKS OF EIFEL 



Upper 

 Gallery, 



12° 



o. 



Scoriaceous basaltic lata, remarkably hard and 



Wall-case 1. 



a few crystals 



containing fine crystals of augite, with 



of reddish coloured felspar, from the Laacher-see . , 



Hibbert " On the Extinct Volcanos of the Rhine," p. 148 ) 



124.— Vesicular basaltic lava, with crystals of auqite 



■Biebrich. 



125,— Slightly vesicular basaltic lava, with crystals of 



augite and olivine. — Norcnberg. 



126— Slightly vesicular basaltic lava, with a few 

 crystals of augite, glassy felspar, and quartz, and small 

 specks of Haiiyne, and containing entangled fragments of 

 laminated felspatlio-hornblendic rock. 



p. 116.) 



May en. 

 Hibbert « On Extinct Volcanos of the Rhine " 



127.— Scoriaceous basaltic lava. 



ifi, 



128— Slightly vesicular basaltic lava, composed almost 

 entirely of crystals of augite, with a crystalline structure 

 and partly scoriaceous ; occurring in numerous large ejected 



blocks on the 



Vbrder Eifeh 



ifelder Maar, near I) 



129— Part of a volcanic bomb, consisting of a core of 

 vesicular augitic lava, surrounded by a coating of more 

 compact lava. — Pulver Maar. 



130.— Olivine coated with scoriaceous lava, a portion of 

 an ejected mass. — Dachueiler. 



(See Hibbert "On Extinct Volcanos," foot note, p. 24.) 



Volcanic rocks from the summit of the Volcanic Mountain 



of St. Vincent. 



Presented by Mr. Gilding. 



131. — Scoriaceous lava, with crystals cf hornblende 



hndfelspar. 



132. — Slightly vesicular lava, with numerous crystals 

 of glassy felspar and hornblende. 



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