A Handy-Book of Rock Names, with Brief Descriptions of the Rocks |
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Page 6
... Cotta , page 46 ) . In Parts II . and III . a general description of each class is given , and a general description of each group ; while under each group will be found the subgroups , and under the latter the varieties , and , when ...
... Cotta , page 46 ) . In Parts II . and III . a general description of each class is given , and a general description of each group ; while under each group will be found the subgroups , and under the latter the varieties , and , when ...
Page 30
... ( Cotta ) . - " A rock of compact texture , about the hardness of felspar , with dull or smooth con- choidal or fissile fracture ; colour yellowish , reddish , grey , greyish , or bluish , weathering white . " - Cotta . To the naked eye ...
... ( Cotta ) . - " A rock of compact texture , about the hardness of felspar , with dull or smooth con- choidal or fissile fracture ; colour yellowish , reddish , grey , greyish , or bluish , weathering white . " - Cotta . To the naked eye ...
Page 31
... Cotta . c . Plumose granite . The mica assumes a plu- mose form , like Prince of Wales's feathers . -Jukes . The granites belonging to this type [ intrusive granite ] in general are not foliated ; nevertheless Forbes mentions a ...
... Cotta . c . Plumose granite . The mica assumes a plu- mose form , like Prince of Wales's feathers . -Jukes . The granites belonging to this type [ intrusive granite ] in general are not foliated ; nevertheless Forbes mentions a ...
Page 34
... ( Cotta ) .- An oligoclase granite , in which there is more or less distinct foliation . Sometimes one of the felspars is porphyritically developed , when in general the mica does not curl round the large crystals of felspar , but the ...
... ( Cotta ) .- An oligoclase granite , in which there is more or less distinct foliation . Sometimes one of the felspars is porphyritically developed , when in general the mica does not curl round the large crystals of felspar , but the ...
Page 35
... Cotta's descrip- tion for the rock called Pegmatyte . The Pegmatyte found associated with the non - intrusive oligoclase granite is , at least in some instances , due to the metamorphism of irregular felspathic veins and len- ticular ...
... Cotta's descrip- tion for the rock called Pegmatyte . The Pegmatyte found associated with the non - intrusive oligoclase granite is , at least in some instances , due to the metamorphism of irregular felspathic veins and len- ticular ...
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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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