138 PHYSIOGRAPHY. 



Pyroxene. 



liated, conchoidal, and common Augite, are found in the first kind of 

 these repositories; granular Augite, Coccolite and Sahlite, occur in the 

 second, and are associated with ores of iron and titanium, Hornblende, 

 Epidote, Feldspar, Scapolite, &c. Omphazite occurs in beds, with 

 Quartz, Garnet and Hornblende ; Diopside in veins, traversing serpen- 

 tine, with Garnet and Mica ; and Fassaite and Baikalite also seem to oc- 

 cur in veins, when they are accompanied by Limestone. 



5. The imbedded varieties of Augite are found almost in every kind 

 of basalt, and those rocks which are allied to it. The largest crystals 

 occur near Aussig in Bohemia ; but it is met with also in the Rhon and 

 Vogel mountains in Germany, in France and Italy, in Scotland and its 

 western islands, &c. Granular Augite and Sahlite are chiefly obtained 

 from Arendal in Norway, and Sahla in Sweden; Baikalite from the 

 mouth of the Sljamanka river, that falls into lake Baikal. Diopside is 

 found in Piedmont ; Fassaite in the valley of Fassa in the Tyrol, and in 

 the Bannat of Temeswar ; Omphazite in the Saualpe in Carinthia, and 

 near Hof in Bayreuth. The beautifully green varieties of granular 

 Pyroxene occur in the Bacher mountain in Lower Stiria; the crystalli- 

 zed green-earth in the valley of Fassa in the Tyrol. The black mineral 

 found in certain meteoric stones, appc'ars to belong to the present species. 

 One of the most interesting localities of Pyroxene in North America, 

 is at Bytown, Lower Canada, where it occurs, in white semi-transparent 

 crystals, disseminated through Calcareous Spar: the crystals are an inch 

 in diameter, and one and a half inches long, of the form of Fig. 352. 

 The cleavage parallel with P is effected with perfect facility, and the 

 whole crystal streaked parallel with that face. Handsome crystals of 

 Diopside occur in the limestone quarry of Bolton, (Mass.) ; and very 

 distinct crystallizations of dark green Augite and Sahlile have been 

 found in veins at the iron-mine of Munroe, (N. Y.) Black crystals oc- 

 cur in the trap of Montreal. The white variety, in large, though often 

 imperfect forms, abounds at Canaan, (Conn.) in the Dolomite beds; also 

 at Kingsbridge, (N. Y.) with white Hornblende. Massive Sahlite, in 

 large individuals, abounds at the Verd Antique quarries of West Haven 

 and Mil ford, (Conn.) ; also at Bolton, (Mass.) : at the latter place, masses 

 compound in the direction of P and r, at the same time, are sometimes 

 observed, A dark green imperfectly crystallized Pyroxene, abounds at 

 Rogers' Rock upon lake George, near Ticonderoga, (N. Y.) where it is 

 imbedded in Feldspar, and associated with Sphene and Plumbago. Coc- 

 colite, of a handsome green color, exists at Willsborough, (N. Y.) in a 

 vein with granular Garnet and Tabular Spar. Granular Pyroxene 

 exists also at Munroe, (N. Y.) 



