The American Geologist, Volume 26Newton Horace Winchell Geological Publishing Company, 1900 - Geology Includes section "Review of recent geological literature." |
From inside the book
Results 1-5 of 48
Page 157
... biotite and quartz , more rarely antho- phyllite or cummingtonite . All these minerals have been formed in peculiar physical conditions which have caused them to take the globular form , so frequent in secondary minerals produced under ...
... biotite and quartz , more rarely antho- phyllite or cummingtonite . All these minerals have been formed in peculiar physical conditions which have caused them to take the globular form , so frequent in secondary minerals produced under ...
Page 165
... Biotite is often conspicuous by reason of the perfection of its cleavage , giving the brightest reflections of a brown to black color , from faces absolutely uniform ; but microscopic study shows that the biotite is usually , if not al ...
... Biotite is often conspicuous by reason of the perfection of its cleavage , giving the brightest reflections of a brown to black color , from faces absolutely uniform ; but microscopic study shows that the biotite is usually , if not al ...
Page 166
... biotite , apatite is often found enclosed in the latter mineral . The magnetite usually shows no good crystal outlines , but in the few cases where they occur the iron oxide is clearly older than the other minerals . The augite in ...
... biotite , apatite is often found enclosed in the latter mineral . The magnetite usually shows no good crystal outlines , but in the few cases where they occur the iron oxide is clearly older than the other minerals . The augite in ...
Page 171
... biotite . In other cases apatite always causes a halo when surrounded by biotite or hornblende . Finally it sometimes happens that in a single thin section apatite causes a halo in some biotite crystals and does not in others . A thin ...
... biotite . In other cases apatite always causes a halo when surrounded by biotite or hornblende . Finally it sometimes happens that in a single thin section apatite causes a halo in some biotite crystals and does not in others . A thin ...
Page 172
... biotite . Apatite ng < ng and nm biotite . The indices of apatite have been carefully measured several times ; the results follow : ng Heusser Schrauf Lattermann Zimányi 1.6460 1.6390 1.6388 1.637 Apatite པོ ། རང་ = 1.6417 1.6345 1.6346 ...
... biotite . Apatite ng < ng and nm biotite . The indices of apatite have been carefully measured several times ; the results follow : ng Heusser Schrauf Lattermann Zimányi 1.6460 1.6390 1.6388 1.637 Apatite པོ ། རང་ = 1.6417 1.6345 1.6346 ...
Other editions - View all
Common terms and phrases
abundant acid albite alteration alumina Amer andesine anorthite antigorite apatite augite biotite Birch lake birefringence bisectrix blastoid bowlingite brown Bull Burlington Canada Carboniferous Carlton peak chemical composition cleavage coal color Cope cordierite cordierite noryte crystals Dawson Devonian diabase elongation extinction angle fayalite feldspar figure flora fossil Fouqué gabbro Geol Geological Survey GEOLOGIST grains green greenish halos hematite hornblende inclusions iron Jour Journ Labrador labradorite lamellæ limestone London magma magnetite mass McGill measures Michel Lévy mineral mineralogical Minn Minnesota Montreal nearly Notes Nova Scotia occurs olivine olivine diabase olivine gabbro optic angle origin orthoclase orthoclase gabbro oxide pale parallel penninite perpendicular Pigeon point plagioclasyte plane plants plates pleochroic pores Prof pyroxene quartz quartz gabbro rare refringence rock Science shows silicoferrolyte species specimens structure texture tion troctolyte twinning usually ventral sac Winchell
Popular passages
Page 20 - Archaia; or, Studies of the Cosmogony and Natural History of the Hebrew Scriptures. By Professor "Dawson, Principal of McGill College, Canada.
Page 17 - On the Course of Collegiate Education adapted to the circumstances of, British America. The Inaugural Discourse of the Principal of McGill College, Montreal.
Page 20 - Notice of Tertiary fossils from Labrador, Maine, etc., and remarks on the climate of Canada, in the newer Pliocene or Pleistocene period: Ibid., June, 1860, vol.
Page 23 - Further observations on the Devonian Plants of Maine, Gaspe", and New York.
Page 46 - The Canadian Ice Age, being notes on the Pleistocene geology of Canada, with especial reference to the life of the period and its climatic conditions.
Page 4 - I would place here first, the establishment of a bond of union between the scattered workers, now widely separated in different parts of the Dominion. Our men of science are so few, and our country so extensive, that it Is difficult to find in any one place, or within reasonable distance of each other, haifa-dozen active workers in science.
Page 20 - Geology, tamo. 70 pp. Wood engravings of fossils. Edinburgh. On an undescribed Fossil Fern from the Lower Coal Measures of Nova Scotia. (Abstract) Can. Nat. & Geol., Vol. 5, No. 6, Dec., 1860, pp. 460-461. Montreal. Quart. Journ. Geol. Soc., Vol. 17, 1861, p. 5. London, Eng.
Page 40 - ... to all who desire to realise the actual surroundings amid which our Lord spent His life on earth, and will be specially useful in correcting some false notions which have obtained wide currency, eg, the common idea that Nazareth was a small, obscure, and immoral place," — Congregationalism Egypt and Syria.
Page 22 - ... date September, 1862, was inserted.) Notes on the flora of the White mountains in its geographical and geological relations: Can. Nat. and Geol., vol. 7, 1862, pp. 80-102, Montreal. On an erect Sigillaria and Carpolite from Nova Scotia: Ibid., vol. 7, pp. 106-113, Montreal. On the footprints of Limulus as compared with the Protichnites of the Potsdam sandstone: Ibid., vol.
Page 5 - History, an incalculable stimulus would be given to science in Canada, by promoting research, by securing to this country the credit of the work done in it, by collecting the information now widely scattered, and by enabling scientific men abroad to learn what is being done here.