294 THE TRAP MINERALS OF NOVA SCOTIA—GILPIN. 
4. Chabazite Group. 
Chabazite. Thisis one of the most characteristic of our trap 
minerals, and occurs usually in rhombohedrons of gray or wine- 
colour tints, with Heulandite, Analcite, and Calcite at Five Is- 
lands, Swan’s Creek, Mink Cove, and Williams Brook. This 
mineral occasionally contains Baryta, and Strontia. 
The following are analyses of specimens from Parrsboro’: 
Si. O—AI. 0O—Ca. 0—Na. 0—K. 0—H. 0 —Fe. 0 
2 2 3 2 
2 2 
51:46—17°65—8-91—1.09 — 17 —19°66— ‘85 Hoffman. 
52°14—19'14—7-84— ‘71 — ‘98 —19:19— — Ramelsberg. 
Acadialite is a reddish coloured variety, so named from its 
having been first found in Nova Scotia. In some specimens 
the colouring matter is arranged in layers and bands in the body 
of the crystals. 
The following analyses are by Hayes : 
Si.0 — Al.0 — Ca.0 — Na.0 — K.0 — H.0 
2 2 3 2 
52:02 — 1788 — 424 — 407 — 303 — 18°30 
52:20 — 1827 — 658 — 2:12 — —-- — 20°52 
The difference being chiefly in the greater amounts alkalies 
and lessened percentage of lime in the latter mineral. Among 
the localities yielding it most abundantly may be mentioned Two 
Islands. 
Gmelinite. This species is not very common here, it being 
met principally at Blomidon (as Ledererite) and on the north 
shore nearly opposite Cape Sharp, in geodes with analcite, and 
frequently implanted on quartz. 
Ledererite (mentioned above) is ordinary Gmelinite impure 
with free silica. Marsh has shown that it does not differ in the 
percentage of water, and Descloiseaux that its crystalline angles 
are the same. 
The following analyses by Prof. Marsh are of specimens from 
the vicinity of Cape Blomidon. The two first show an excess of 
silica due to visible quartz which was separated in the third 
analysis: 
