The Nomenclature of Petrology: With References to Selected LiteratureThomas Murby & Company, 1928 - 284 páginas |
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The Nomenclature of Petrology: With References to Selected Literature Arthur Holmes Pré-visualização indisponível - 2016 |
The Nomenclature of Petrology: With References to Selected Literature ... Arthur Holmes Pré-visualização indisponível - 2018 |
Palavras e frases frequentes
abundant ægirine aggregates albite alkali-felspars altered amphiboles analcite andesite anorthite apatite aphanitic augite basaltic biotite Bull calcareous calcite characterised chemical chlorite composed essentially composition constituents containing phenocrysts crystalline crystals deposits diabase diorite dolerite dyke exogenetic felsic felspar felspathoid fine-grained foliation formed G. W. Tyrrell gabbro garnet Geol Geology glass gneiss grains granite granular groundmass H. S. Washington Harker Holmes hornblende hypersthene igneous rocks Inst intrusions J. J. H. Teall J. P. Iddings J. S. Flett Journ labradorite Lacroix lava leucite leucocratic limestone mafic mafic minerals magma magnetite melanocratic metamorphic rocks meteorite mica nepheline nepheline-syenite occurring oligoclase olivine origin orthoclase phanerocrystalline rock phenocrysts plagioclase porphyritic Proc pyroxene quartz R. A. Daly rock composed rock containing Rosenbusch sandstone schist schistose Sederholm shale Shand siliceous solution structure Surv syenite T. G. Bonney term applied term suggested texture tion trachyte Trans tuffs variety volcanic rock W. C. Brögger
Passagens conhecidas
Página 6 - When I use a word,' Humpty Dumpty said in rather a scornful tone, 'it means just what I choose it to mean — neither more nor less.' 'The question is,' said Alice, 'whether you CAN make words mean so many different things.
Página 6 - I don't know what you mean by 'glory'," Alice said. Humpty Dumpty smiled contemptuously. "Of course you don't — till I tell you. I mean 'there's a nice knockdown argument for you' !" "But 'glory' doesn't mean 'a nice knock-down argument',
Página 280 - DR. HOLMES' FORM FOR THE CALCULATION OF THE NORM OR STANDARD MINERAL COMPOSITION. 12 Forms. Is. 9d. net, postage 2d. METHODS IN PRACTICAL PETROLOGY. By HB MILNER. BA, FGS, and GM PART, BA, FGS Hints on the Preparation and Examination of Rock Slices.
Página 76 - DACITE (qv) ie containing both orthoelaso and plagioclase (oligoclaseandesine). differentiation. A general term for the processes whereby different types of igneous rocks, which may or may not form parts of the same mass, are produced from a common magmatic source.
Página 280 - The authors are to be congratulated for having stated the essentials of Crystallography in such simple, clear language.
Página 282 - STUDENT'S ISSUE of the above with same contents, bound in brown cloth, ink lettering, 20s. net. HANDBOOK OF THE GEOLOGY OF IRELAND. By the late PROFESSOR GRENVILLE AJ COLE. D.Sc,, FRS , M,RIA, Director of the Geological Survey of Ireland and T. HALLISSY, BA, MRIA, of the Geological Survey of Ireland 8s. 6d. net. postage 5d.
Página 80 - ... rounded extrusions of highly viscous lava squeezed out from a volcano, and congealed above and around the orifice instead of flowing away in streams. Portions of older lavas or ejectamenta may be elevated by the pressure of the new lava rising from beneath. The second type of dome is usually distinguished as a volcanic dome.
Página 58 - The property of minerals, due to their atomic structure, whereby they can be readily separated along planes parallel to certain possible crystal faces, (b) The property of rocks such as slates, which have been subjected to erogenic pressure, whereby they can be split into thin sheets, the plane of cleavage being at right angles or inclined to the direction in which the pressure was applied, according to the effects produced by shearing-stress during the process. Willis, B. and R., 1934, Geologic...
Página 52 - A large transgressivo intrusion with steeply-inclined sides and no visible or determinable floor. cataclastic. A term used in reference to the structures produced in a rock by the action of severe mechanical stress during dynamic metamorphism, characteristic features being the deformation and granulation of the minerals. clastic. A term applied to rocks composed of fragments of pre-existing rocks. contact metamorphism. The alteration of rocks in contact with, or proximity to, a body of igneous rock....
Página 197 - Mineralogical varieties such as feldspathic and glauconitic sandstones are recognized, and also argillaceous, siliceous, calcareous, ferruginous and other varieties according to the nature of the binding or cementing material (AGI).