Guide books of excursions in Canada1-10 . urfaces are entirely absent. A black hornblende,as well as a little pyrrhotite, may also be seen. The rockcontains masses of pure nepheline which in places measurea yard in diameter. Sodalite is also occasionally repre-sented as irregular masses sometimes two inches in dia-meter, included in the large masses of nepheline and havingapparently been derived from them by secondary party will then go to a point by the roadside onlot 29 of Con. Ill, where a good view over the district tothe north can be obtained, and whence, on a clear day,the cha
Guide books of excursions in Canada1-10 . urfaces are entirely absent. A black hornblende,as well as a little pyrrhotite, may also be seen. The rockcontains masses of pure nepheline which in places measurea yard in diameter. Sodalite is also occasionally repre-sented as irregular masses sometimes two inches in dia-meter, included in the large masses of nepheline and havingapparently been derived from them by secondary party will then go to a point by the roadside onlot 29 of Con. Ill, where a good view over the district tothe north can be obtained, and whence, on a clear day,the character of the peneplain can be seen (see p. 11.) The country rock at this point shows one phase of thegabbro of a great intrusion which underlies a large area of thecountry to the south. This intrusion has a length ofeight miles (12-9 km.) and a maximum width of two anda half miles (4. km.). The gabbro composing it shows avery marked variation in composition from place to place,ranging in character from a rock in which plagioclase pre—. •5 v CD *J S5 J- o bB a; ^ O 0)— uco c3 S U 0) J- « 8 75 ponderates largely through increasingly basic varieties toa pyroxenite and an iron ore. No regular order is observa-able in the distribution of these varieties. The party will not have time to visit the occurrencesof iron ore in question, but some large blocks of it havebeen brought out to the main road and from an examination 1 ?— ST ... ?H . ^-x# H,. $S&-^ ?* Mm Y pup RIP ?*$$£& .- Hfc sPte^ B^^ BSl ,-- <^B ?SI K%f-1 Puseys iron ore. Glamorgan, lot 35 of con. IV (X 19 diam.) Pyroxene individuals enclosed iniron ore. About each pyroxene there is a narrow border of hornblende. of these its character may be seen. It is a titaniferousiron ore, containing a small percentage of vanadium, asshown by the following analysis:— 76 Fe203 FeO .. CoO Si02 P205 s Ti02 V205 MgO BaO CaO . K20 Moisture. 39 27 21 73 37 27 07 4 6i 10 77 02 II 13 52 52 2 34
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeology, bookyear1913
