"Metamorphic" Quotes from Famous Books
 ... two divisions have been organized to prosecute work on the archaean rocks, embracing within their field not only all rocks of archaean age, but all metamorphic crystalline schists, of whatever age they may be found. The first division has for its chief Prof. Raphael Pumpelly, assisted by a corps of geologists, and the field of his work is the crystalline schists of the Appalachian region, or eastern portion of the United States, ...
— Scientific American Supplement, No. 484, April 11, 1885 • Various
... things clearer' in his mind two spare pages of the diary are filled with neat tables, showing the main classes into which rocks are divided, and their natural subdivisions—the sedimentary, according to mode of deposition, chemical, organic, or aqueous; the metamorphic, according to the kind of rock altered by heat; the igneous, according to ...
— Scott's Last Expedition Volume I • Captain R. F. Scott
... on the bottoms of ancient oceans, lakes, and rivers, from which they have gradually been raised, to form dry land. (2) Eruptive or volcanic rocks. These have been forced, as hot fluids, through rents and fissures from the interior of the earth. (3) Metamorphic rocks. These, by the combined action of heat, pressure, water, and chemical agents, have been crystallized and chemically altered. The rocks of the first class, such as chalk, limestone, shale, and sandstone, are distinguished by the existence of fossils in them, ...
— An Introduction to Chemical Science • R.P. Williams
... it is broken into hills, for the most part low and very irregular in outline, with numerous outliers in the Lower Assam Valley, even close up to the Himalayas. In the central region the gneiss is covered by transition or sub-metamorphic rocks, consisting of a strong band of quartzites overlying a mass of earthy schists. In the very centre of the range, where the table-land attains its highest elevation, great masses of intrusive diorite and granite occur; and the latter is found ...
— The Khasis • P. R. T. Gurdon
... the geological "country rock" in which red gold is most likely to be discovered—i.e., the junction of the slates and schists with the igneous or metamorphic (altered) rocks, or in this vicinity. Old river beds formed of gravelly drifts in the same neighbourhood may probably contain alluvial gold, or shallow deposits of "wash" on hillsides and in valleys ...
— Getting Gold • J. C. F. Johnson
... Porine marble was the Marmor Hymettium of the ancients; but it was never a great favourite in Rome on account of its large grain and dingy white colour, slightly tinged with green and marked by long parallel dark gray veins of unequal breadth. The metamorphic action was not sufficiently energetic to destroy the last traces of organic matter and the original stratification of the rock; and the crystallising force was not sufficiently exercised to allow of the entire rearrangement of the whole of the ...
— Roman Mosaics - Or, Studies in Rome and Its Neighbourhood • Hugh Macmillan |
