A Guide to the Determination of Rocks: Being an Introduction to Lithology |
From inside the book
Results 1-5 of 27
Page 8
... Basalts , Lavas , and the different solid matters which are at the present time thrown from the craters of volcanoes . Such are the three great orders of rocks , characterized by the following very different relations of position : ( 1 ) ...
... Basalts , Lavas , and the different solid matters which are at the present time thrown from the craters of volcanoes . Such are the three great orders of rocks , characterized by the following very different relations of position : ( 1 ) ...
Page 16
... basaltic or adelogenic rocks . It permits , also , the study of the minutest details of the mineral structure of rocks . It is often difficult to distinguish , under the microscope , the separate elementary constituents , even when the ...
... basaltic or adelogenic rocks . It permits , also , the study of the minutest details of the mineral structure of rocks . It is often difficult to distinguish , under the microscope , the separate elementary constituents , even when the ...
Page 19
... basalts , the crys- tals of Feldspar , distributed parallel to their planes of lateral cleavage , present , when observed between two Nicol prisms , al- ternate bands of different colors . III . Another fact of which it is necessary to ...
... basalts , the crys- tals of Feldspar , distributed parallel to their planes of lateral cleavage , present , when observed between two Nicol prisms , al- ternate bands of different colors . III . Another fact of which it is necessary to ...
Page 30
... Basalts , where it appears as an accidental element , the powder is gen- erally brownish . Hornblende fuses to a black enamel , and is attacked by acids when it contains much iron . PYROXENES . ( Bi - Silicate of Magnesia , or its ...
... Basalts , where it appears as an accidental element , the powder is gen- erally brownish . Hornblende fuses to a black enamel , and is attacked by acids when it contains much iron . PYROXENES . ( Bi - Silicate of Magnesia , or its ...
Page 32
... basalts is granular , and of a more or less deep green color ; often in the very ferruginous varie- ties , the colors are a dirty red or brown . Olivine is infusible before the blow - pipe ; reduced to a fine powder , it forms a gela ...
... basalts is granular , and of a more or less deep green color ; often in the very ferruginous varie- ties , the colors are a dirty red or brown . Olivine is infusible before the blow - pipe ; reduced to a fine powder , it forms a gela ...
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.