Textbook

Petrography

---

This book is concerned more with the description of rocks than with problems of genesis, more with petrography than with the broader field ofm petrology. Considerable space is devoted, nevertheless, to the mode of origin of igneous and methamorphic rocks, and even more is given to discussion of how sedimentary rocks are formed. We have assumed that the reader has already learned how to identify rocks by means of the hand lens, and is already acquinted with the principles of optical mineralogy. If he has this background, the present subject matter may be covered adequately by a years course of six hours'laboratory work a week; indeed, by proper selection of rock types, the student may obtain a satisfactory basis of thin-sectio petrography within a semester. Previous texts of this nature seem to us to devote too little attention to sedimentary rocks. This is regrettable, for most students of geology now enter the petroleum industry, where problems of sedimentation are of paramount importance. Lack of space, however, has made it necessary to omit all account of the study of sediments by oil-immersion methods, and to concentrate on the much-neglecte examination of these rocks in thin sections. Experience has taught us that indescribing igneous rocks it is best to begin with fine-grained varieties that are obviously of magmatic origin, and then to consider their coarser-graine equivalents, the origin of someof which is still in doubt. And it has seemed proper to us to reverse the costumary order of treatment by discussing first the basic igneous rocks and last the coarse-grained siliceous ones, some of which appear to bear the imprint of a metamorphic origin. Emphasis is placed, accordingly, on the transitional character of many igneous and ,metamorphic phenomena.

---

Ketersediaan

Informasi Detail

Judul Seri

-

No. Panggil

PMB 550.89 WIL p

Penerbit

San Fransisco : W. H. Freeman and Company., 1954

Deskripsi Fisik

Hardcover Coklat, 406 halaman, Index

Bahasa

English

ISBN/ISSN

7167-0206-1

Klasifikasi

550.89 WIL p

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

Text Book

Info Detail Spesifik

-

Pernyataan Tanggungjawab

-

Informasi Lainnya

Kode Wilayah

-

Pulau Dan Lembar Peta

Lainnya

Provinsi

Lainnya

Koordinat - Latitude

-

Koordinat - Longitude

-

Versi lain/terkait

Lampiran Berkas