204 Notices of the Geology and Mineralogy of Sicily. 
under the calcareous stratum covering the island. It is found 
in these cavities in every state of sagan from a 
granular or laminated mass to the finest d points, 
shooting across or lining the cavity. It is sie ways white, 
except in decomposed lavas, where its surface is stained 
by oxide of iron. 
estan Carbonate in opaque masses studded with 
thomboids, in connexion with carbonate and sulphate of 
lime. Brown Spar, oo ‘stalactites with yellowish 
we sided pyramids. In minute rounded ee in the 
es of Spathic iron, at Fv thine di Nist 
Pi iemgats Carbonate, in masses of various sizes in ‘the 
ge” limestone, and.) in small pieces among the crystals 
of calcareous spar. The larger and harder masses ate 
se in She asa black marble. Sometimes it is so 
etroleum, as to be combustible; and — 
a liq Papices the petr ona Sctenitag® miner- 
thy carbonate se 
Balle, ee mixtur 
sul pitiean aes y famous as a panace 
pr ties of absorbents and sulphur. The earth 
is almost universally Marl. The marls of Val di Wittors 
are calcareous ; those of Valdemone, siliceous and ferrugi- 
nous; and in the volcanic districts of Val di Noto, highly 
argillaceous and ferruginous. Indurated Marl is very com- 
mon; some of it is wrought as marble; it often forms i im- 
mense masses, divided by Phe fissures into atic 
blocks. In the mountains of ae a, ic. are strata of i in- 
durated mail, containing petrolet 6 
_ Sulphate of lime is found in ory Corner of Sicily, par- 
wealerly at Raddusa and Paterno, in the plain of Catania 
and at Taormina. It forms entire mountains, subordinate — 
to the limestone mountains. It is also imbedded in chalk 
and marl, and is found in veins in the alt Timestone. In 
all these cases itis secondary. Primitive G mis fo und 
in the granite of Pelorus, It unr eeapees the beds 
_ Of sulphur and salt so common in the islan @ remarlas 
_ ble instance of the sulphur imbedded in chalk, an 
on | sulphur, oeconat Raddusa. It is found in the forme 
gipsum, earthy and farinaceous gypsum, 
and selenite, or oe Byatalabad eiptnin, ota ite de 
of gypsum are found occupying the cavities of lavas in the 
