A Guide to the Determination of Rocks: Being an Introduction to Lithology |
From inside the book
Results 1-5 of 60
Page 13
... itself may be distinctly seen . A rock of group I may be vitreous or compact and dull . If it belongs to group A , it may have a radiated structure . We then have to choose in subdivision 1 , from a small INTRODUCTION . 13.
... itself may be distinctly seen . A rock of group I may be vitreous or compact and dull . If it belongs to group A , it may have a radiated structure . We then have to choose in subdivision 1 , from a small INTRODUCTION . 13.
Page 23
... compact ( Petrosilex ) ; vitreous ( Obsidian and Perlite ) . The general characteristics exhibited by Orthoclase in rocks are its vitreous or slightly pearly lustre , its laminated fracture , its hardness and its fusibility before the ...
... compact ( Petrosilex ) ; vitreous ( Obsidian and Perlite ) . The general characteristics exhibited by Orthoclase in rocks are its vitreous or slightly pearly lustre , its laminated fracture , its hardness and its fusibility before the ...
Page 30
... compact variety of Tremolite . — It is Actinolite ( Iron , Magnesium and Calcium Silicates ) .- Isomorphous with the preceding . Density , 3 to 3.2 . found in greenish masses , radiated in Mica schists . Hornblende . - Composition ...
... compact variety of Tremolite . — It is Actinolite ( Iron , Magnesium and Calcium Silicates ) .- Isomorphous with the preceding . Density , 3 to 3.2 . found in greenish masses , radiated in Mica schists . Hornblende . - Composition ...
Page 34
... with intumescence to a black mass , which is generally magnetic . Reduces to a jelly in acids , only after calcination . It occurs in various forms ; In acicular , fibrous , granular , compact . rocks. 34 DETERMINATION OF ROCKS .
... with intumescence to a black mass , which is generally magnetic . Reduces to a jelly in acids , only after calcination . It occurs in various forms ; In acicular , fibrous , granular , compact . rocks. 34 DETERMINATION OF ROCKS .
Page 35
... compact . rocks , it is the pistachio - green color that pre- dominates . A b2 Р h1 ۱۹ Garnet . This group contains a great num- ber of species ; the dominant forms are , rhom- boidal dodecahedrons , trapezohedrons ( Fig . 16 ) and a ...
... compact . rocks , it is the pistachio - green color that pre- dominates . A b2 Р h1 ۱۹ Garnet . This group contains a great num- ber of species ; the dominant forms are , rhom- boidal dodecahedrons , trapezohedrons ( Fig . 16 ) and a ...
Other editions - View all
Common terms and phrases
Accessory elements Accidental minerals Alumina Amphibole argillaceous attacked by acids Augite Basalts blackish blow-pipe Breccia brown Calc-spar Calcite Calcium carbon cavities cement Chlorite clay cleavage closed tube Cloth colorless compact conchoidal fracture contains crystalline crystals Delesse density Diorite Dolomite earthy easily Edition effervescence enamel Engineers Epidote Eurite exhibits Feldspar fibrous fragments fuses fusible Garnet globule globuliferous Gneiss grains granite granular gray grayish greasy lustre greenish hardness heated hexagonal Hornblende hydrochloric acid Illustrated Infantry infusible insoluble Labradorite laminæ layers less Lime Limestone Magnesia magnetic Magnetite Marl masses Melaphyres Mica Mica Schist Military Naval Oligoclase Oolitic Ordnance Orthoclase oxide of Iron paste pearly Phonolite plates porous Porphyry powder prisms Pumice Pyrites Pyroxene Quartz reddish rhombic base rock sandstone Schist schistose scoriaceous Silica slates sometimes steel point sulphuric acid Talc texture Tourmaline Trachytes TREATISE U. S. Army U. S. Navy varieties vitreous yellow yellowish yields
Popular passages
Page 2 - The Geology of Pennsylvania. A Government Survey, with a General View of the Geology of the United States, essays on the Coal Formation and its Fossils, and a description of the Coal Fields of North America and Great Britain. Illustrated with plates and engravings in the text. 3 vols. 4to, cloth, with portfolio of maps i5 oo ROSE (JOSHUA, ME ) The Pattern-makers
Page 4 - NP Modern Marine Engineering, applied to Paddle and Screw Propulsion. Consisting of 36 colored plates, 259 practical woodcut illustrations, and 403 pages of descriptive matter. The whole being an exposition of the present practice of James Watt & Co. , J. & G. Rennie, R.
Page 13 - THE MECHANIC'S FRIEND. A Collection of Receipts and Practical Suggestions, relating to Aquaria — Bronzing — Cements — Drawing — Dyes — Electricity — Gilding...
Page 16 - Light-Houses. EUROPEAN LIGHT-HOUSE SYSTEMS ; being a Report of a Tour of Inspection made in 1873. By Major GEORGE H. ELLIOT, Corps of Engineers, USA Illustrated by 51 Engravings and 31 Woodcuts in the Text. 8vo, 2ls.
Page 3 - The THEORY of STRAINS in GIRDERS and similar Structures, with Observations on the application of Theory to Practice, and Tables of the Strength and other Properties of Materials. By BINDON B.
Page 19 - Second edition, revised and enlarged. No. 19. STRENGTH OF BEAMS UNDER TRANSVERSE LOADS. By Prof. W. Allan, author of "Theory of Arches.
Page 13 - Schools, in which the Definitions and Rules of Geometry are familiarly explained ; the Practical Problems are arranged, from the most simple to the more complex, and in their description technicalities are avoided as much as possible.
Page 16 - ALEXANDER (JH). Universal Dictionary of Weights and Measures, Ancient and Modern, reduced to the Standards of the United States of America.
Page 31 - OF MILITARY BRIDGES, in Use by the United States »•-} Army ; those adopted by the Great European Powers ; and such as are employed in British India. With Directions for the .Preservation, Destruction, and Re-establishment of Bridges.
Page 20 - A Guide to the Determination of Rocks : being an Introduction to Lithology. Translated from the French by GW Plympton, Professor of Physical Science at Brooklyn Polytechnic Institute. 12mo, cloth $1 . 50 JEHL, F., Mem.