Petrology of the Sedimentary Rocks by J. T. Greensmith (auth.)

By J. T. Greensmith (auth.)

Show description

By J. T. Greensmith (auth.)

Show description

Read Online or Download Petrology of the Sedimentary Rocks PDF

Similar geology books

The Earth's Core

For complex undergraduate and starting graduate scholars in atmospheric, oceanic, and weather technological know-how, surroundings, Ocean and weather Dynamics is an introductory textbook at the circulations of the ambience and ocean and their interplay, with an emphasis on international scales. it is going to supply scholars a great grab of what the ambience and oceans appear like at the large-scale and why they give the impression of being that means.

The surface rupture of the 1957 Gobi-Altay, Mongolia, earthquake

Amazing certain booklet discussing the earthquake that modified a few preconceived options with regards to intracontinental mountain construction. good written and comprises the entire diagram inserts and maps. e-book in very good form.

Properties of Reservoir Rocks: Core Analysis

This e-book describes porous media and the way their actual, petrophysical, mechanical, electrical and superficial homes are decided. the several measuring equipment and the corresponding gear are defined. middle research (conventional or particular) required for any reservoir engineering operation or for utilizing mathematical versions is defined.

Additional info for Petrology of the Sedimentary Rocks

Example text

The latter are commonly angular and have often been faceted or striated by attrition on rock surfaces, or by mutual pressure. Boulder clay sometimes contains intercalated beds of sand and gravel, and thus grades into fluvioglacial deposits. To find true modern boulder clay we must turn to Greenland, Spitzbergen or the Antarctic, where it seems to be a characteristic product of glaciation by continental ice sheets. ,> 1. / . /W"/ ........ )! ;::........ 2-5 10 5 (}5 1·0 / Silt) :' . ,// / /I / .

Conglomerates which have derived their pebbles at second or third hand from older rudaceous deposits without access offresh material tend, therefore, to contain a high proportion of such resistant materials. The principal rocks which are found to behave in this way are vein-quartz, quartzite, flint, chert, jasper, rhyolite and quartz-aggregates derived from acid igneous rocks and gneisses. It is seldom that a gravel is composed entirely offragments offew kinds of rock (oligomictic); much more frequently it is polymictic, or composed of many kinds.

2-5 10 5 (}5 1·0 / Silt) :' . ,// / /I / . ~/ Is! 6 Mechanical compositIOn of glacial and fluvioglacial deposits expressed by cumulative curves based on sieving of the disaggregated particles. The quality of sorting (which reflects natural sorting processes) is indicated by the size range and slope of the curves. Narrow ranges and high slopes mean good sorting. All samples are from North America. The boulder clays (5,6) show characteristic poor sorting. The remainder, which are much better sorted, show the effects of water transport to varying degrees.

Download PDF sample

Rated 4.07 of 5 – based on 10 votes