Petrology for Students An Introduction to the Study of Rocks Under the Microsco
Petrology for Students An Introduction to the Study of Rocks Under the Microsco
The book Petrology for Students An Introduction to the Study of Rocks Under the Microsco was written by author Here you can read free online of Petrology for Students An Introduction to the Study of Rocks Under the Microsco book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Petrology for Students An Introduction to the Study of Rocks Under the Microsco a good or bad book?
Where can I read Petrology for Students An Introduction to the Study of Rocks Under the Microsco for free?
In our eReader you can find the full English version of the book. Read Petrology for Students An Introduction to the Study of Rocks Under the Microsco Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Petrology for Students An Introduction to the Study of Rocks Under the Microsco
In our eReader you can find the full English version of the book. Read Petrology for Students An Introduction to the Study of Rocks Under the Microsco Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Petrology for Students An Introduction to the Study of Rocks Under the Microsco
What reading level is Petrology for Students An Introduction to the Study of Rocks Under the Microsco book?
To quickly assess the difficulty of the text, read a short excerpt:
(1900) Ivi, 211-214.
170 LEUCITOPHYRES British East Africa 1 . Here the felspar is anorthoclase in large porphyritic crystals, and the other phenocrysts are a pale green augite and abundant olivine.
The leucitophyres are a very small group of rocks, known only from a few districts, and best developed in the late Tertiary lavas of the Eifel. The leucite is often of two genera- tions, the larger crystals being frequently of irregular shape. It is always accompanied by nosean and sanidine (fig. 57..., B). The ferro-magnesian mineral is a green pleochroic augite with zonary banding : the other constituents are sphene, occasionally biotite, and often a little melanite. The structure of the rocks is very variable. In some there is a well-defined ground-mass of minute nepheline, sanidine, augite, and leucite, enclosing phenocrysts of leucite and nosean (Olbriick, etc. ). In other varieties there is but little sanidine (Schorenberg), while others again have sanidine in large shapeless plates enclosing the other constituents instead of a ground-mass (Perlerkopf).
What to read after Petrology for Students An Introduction to the Study of Rocks Under the Microsco?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Harker to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
(1900) Ivi, 211-214.
170 LEUCITOPHYRES British East Africa 1 . Here the felspar is anorthoclase in large porphyritic crystals, and the other phenocrysts are a pale green augite and abundant olivine.
The leucitophyres are a very small group of rocks, known only from a few districts, and best developed in the late Tertiary lavas of the Eifel. The leucite is often of two genera- tions, the larger crystals being frequently of irregular shape. It is always accompanied by nosean and sanidine (fig. 57..., B). The ferro-magnesian mineral is a green pleochroic augite with zonary banding : the other constituents are sphene, occasionally biotite, and often a little melanite. The structure of the rocks is very variable. In some there is a well-defined ground-mass of minute nepheline, sanidine, augite, and leucite, enclosing phenocrysts of leucite and nosean (Olbriick, etc. ). In other varieties there is but little sanidine (Schorenberg), while others again have sanidine in large shapeless plates enclosing the other constituents instead of a ground-mass (Perlerkopf).
What to read after Petrology for Students An Introduction to the Study of Rocks Under the Microsco?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Harker to read onlineMoreLess
Read book Petrology for Students An Introduction to the Study of Rocks Under the Microsco for free
Write Review:
User Reviews: