MINI^^EALS OCCUERING IN CANADA. 89 



143. Laumontite — Is very abundant at Port George, where occasionally veins of three 

 inches thickness are seen intersecting the sides of the cliff, and is also found at Mar- 

 garetville, where it occurs colored green by copper, Annapolis county, province of 

 Nova Scotia. Anal., H. How, Am. Journ. Sci., 2 ser., vol. xxvi, p. 30, 1858. 



144. L.\ZUL1TE — fias been found — massive, of a deep azure-blue color, in narrow veins 

 traversing a greyish-white, in parts milk-white, subtrausluceut quartz — three- 

 quarters of a mile east of the mouth of the Churchill River, District of Keewatin. 

 Anal., G. C. Hoffmann, Eep. Geol. Can., 1878-79, p. 2 H. 



145. Lead. Native, — "Was observed by Prof Chapman to occur, in the form of thin strings, 

 in a colorless quartz from the vicinity of Dog Lake of the Kamiuistiquia, Thunder 

 Bay, Lake Superior, province of Ontario. 



146. Lepidomelane — Has been met with, as an associate of arsenopyrite, in the township 

 of Marmora, Hastings county, province of Ontario. (See undi-r Addenda.) 



147. Lignite — Of varying composition, but for the most part of very superior quality, of 

 Cretaceous and Laramie age, is found over very extensive areas throughout the 

 North-west Terril-ories : there are also extensive Tertiary deposits, supposed to be of 

 Miocene age, both on the coast and interior of British Columbia, which in many 

 places contain lignites. For reference to analyses, see under "Mineral coal." 



148. LiMONiTE — Important deposits of this mineral are met with in Pictou and Colches- 

 ter counties, province of Nova Scotia. As there met with, it occurs in the form of 

 lustrous botryoidal or mammillary and stalactitic masses, which exhibit a fibrous 

 structure when broken ; also compact and lustreless, and at other times earthy. 

 Analyses, B. J. Harrington and G. C. Hoffmann, Rep. Geol. Can., 1873-74, pp. 231- 

 234. — See also notes to " Bog-iron-ore," " Iron-ochre." 



149. Loganite— Occurs, in the form of short thick oblique rhombic prisms of a clove or 

 chocolate-brown color, in association with serpentine, phlogopite and apatite, in a 

 white crystalline limestone at the Calumet Falls, Pontiac county, province of Quebec. 

 Analyses, T. S. Himt, Geol. Can., 1863, p. 490. 



150. LouisiTE — Honeyman, with analysis, Trans. N.S. Inst., vol. v, p. 15, 1879-82. [Needs 

 further examination ; free silica is very probably present — Dana, Miu., App. 3, p. 70, 

 1882]. 



151. MACiNEï^lTE — Has, so far, only been met wiih in rock masses, forming, in association 

 with serpentine, dolomite and steatite, beds in the townships of Sutton and Bolton, 

 Brome county, province of Quebec. 



152. Magnetite — Is found, often beautifully crystallized, in veins in the Trias.sic trap of 

 King's and Annapolis counties, in the province of Nova Scotia. Occurs massive, or 

 disseminated in crystals in dolomite and chloritic slate (sometimes constituting fifty- 

 six per cent, of the mass) in the metamorphic strata of the Eastern Townships of 

 Sutton, Bolton, Ascot, Leeds and Orford ; in the Laurentian, in the township of Hull, 

 etc., — also, in the form of black sand (see note to iron-sand), on the north shore of the 

 Gulf of St. Lawrence, — in tlie province of Quebec. Forms deposits, frequently of very 

 great extent, among the Laurentian rocks, in the counties of Frontenac, Hastings, 

 llaliburton, Lanark, Leeds, Peterborough, Renfrew, etc., and is also met with in 

 certain localities on Lakes Superior and Huron, province of Ontario. Further west, 

 important deposits occur in crystalline rocks, supposed to be of Carboniferous age, in 



Sec. HI, 1889. 12. 



