A Handy-Book of Rock Names, with Brief Descriptions of the Rocks |
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Page 3
... Usually the sedimentary rocks associated with granite are more or less metamorphosed : some- times the metamorphism is very slight indeed . This may be due to the granite having been formed at a lower zone or depth , and intruded into ...
... Usually the sedimentary rocks associated with granite are more or less metamorphosed : some- times the metamorphism is very slight indeed . This may be due to the granite having been formed at a lower zone or depth , and intruded into ...
Page 26
... usually is a quaternary or quinary aggre- gate , containing , along with quartz , one or two fel- spars and one or two micas ; nevertheless , other minerals are often present , more especially pyrite and marcasite . † Some granites are ...
... usually is a quaternary or quinary aggre- gate , containing , along with quartz , one or two fel- spars and one or two micas ; nevertheless , other minerals are often present , more especially pyrite and marcasite . † Some granites are ...
Page 28
... usually very acid , con- taining as much as sixty per cent . of silex . They generally fuse at a temperature of 1,450 ° C. As they flow out of the breast of the furnace , they may be observed to do so very leisurely , to be sluggish and ...
... usually very acid , con- taining as much as sixty per cent . of silex . They generally fuse at a temperature of 1,450 ° C. As they flow out of the breast of the furnace , they may be observed to do so very leisurely , to be sluggish and ...
Page 29
... usually purplish or red- dish purple in colour . An aggregate of felspar ( orthoclase ) , quartz , and mica . Black and white mica seem always to be present , but often in such minute flakes as to be only microsco- pically visible ...
... usually purplish or red- dish purple in colour . An aggregate of felspar ( orthoclase ) , quartz , and mica . Black and white mica seem always to be present , but often in such minute flakes as to be only microsco- pically visible ...
Page 30
... usually they appear to be sparingly and partially developed . F. GREISSEN ; QUARTZITIC GRANITE . — Apparently a crystalline granular aggregate of quartz and mica . Greissen occurs associated with the intrusive granite , and merges into ...
... usually they appear to be sparingly and partially developed . F. GREISSEN ; QUARTZITIC GRANITE . — Apparently a crystalline granular aggregate of quartz and mica . Greissen occurs associated with the intrusive granite , and merges into ...
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A Handy Book of Rock Names: With Brief Descriptions of the Rocks (1873) G. Henry Kinahan No preview available - 2008 |
Common terms and phrases
aggregate amphibole Arenaceous Argillous Argillyte Augyte beds bituminous Breccia Calcareous Carbonaceous Chloritic Class clay cloth coal colour compact Concretionary Conglomeritic contains Cotta Crown 8vo crystalline crystals deposited Derivate rocks Dioryte Dolomyte drift dykes elvanyte Euryte F.R.S. Illustrated Fcap felsitic felspar felspathic Ferruginous fissile foliation formed geological gneiss Gneissoid Gneissyte granite granitoid granular Grass grit Group Hematitic highly siliceous Hornblendic igneous rocks ingenite rocks Ireland Jukes labradorite Lankester less Lignyte limestone marcasite marl mass matrix metamorphic metamorphosed mica mica-schist Micaceous Microscopic minerals Nodular occur oligoclase oligoclase granite Ophyte orthoclase plates Plutonic rocks Popular Science Review Porphyritic Prof pyrite pyroxene quartz Quartzose R. A. Proctor Ribaned ripidolite ROCK NAMES sand sandstone schist schistose Sedges sedimentary rocks Shale siliceous slate slaty Sowerby's English Botany spheroidal Steatyte Structural Varieties Subgroup Subvar subvarieties Syenyte Trachyte Tufa tuff Tuffose Turf usually Varieties in Composition veins Vesicular Volcanic Whinstone
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