296 THE TRAP MINERALS OF NOVA SCOTIA—GILPIN. 
lustre. It was first described, I believe, by Dr. How, who gave 
the mean of two analyses : 
Si 0 — Al0 — H 0 — Mglod. — Ca 0 KO HO 
57°57 12-60 — 1-14 — 187 — 9:82 — 3715-69 
It has been noticed forming the thin outer crust of amygdules in 
trap near Black Rock. 
Mordenite-—This mineral, also a discovery of Dr. How, occurs 
near Morden in trap with Apophyllite, Barite, and a Phrenite 
like mineral, also with Gyrolite at Peter’s Point, eight miles west 
of the preceding locality. 
The following is his analysis : 
Silica — Alumina — Lime — Soda — Water. 
6340 — 1277 — 346 — 235 — 13:02 
It is presented in small cylindrical and reniform masses, with a 
whitish yellow and pink colour. It is the most highly silicated of 
the Aluminous non magnesian hydrous silicates, yet described.. 
Steelite—This variety occurs at Cape Split, and is so well 
defined that it is proposed to give it a place as a variety of Mor- 
denite. 
Among the better known minerals, outside the zeolite, may be 
mentioned : 
Chloropheite, a dark green to brown inineral, found imbedded 
but generally as a lining in cavities. 
Delessite, or Ferruginous Chlorite, has been reported from 
Partridge Island, where it is said to fill cavities in the amygda- 
loid. 
Glauconite—This hydrous silicate of iron and potash, belong- 
ing to the class found in cavities in eruptive rocks, occurs at 
several points. 
Gypsum.—This mineral occurs fibrous, massive and foliated, at 
numerous localities. 
Calespar is frequently met with. Fine specimens are met as 
rhombohedral, white-yellow crystals, and as dog-tooth spar, at 
Partridge Island, Two Islands and Black Rock. 
Barvite is also met accompanying many of the above mentioned 
minerals, in the massive, lamellar and crested forms. 
