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It is intended as a reference book for undergraduate and postgraduate students. Introduction to the Rock-forming Minerals is a condensed version of the multi-volume work Rock-forming Minerals by the same authors, which was published in 1962-3 with a second edition beginning in 1978, totalling 11 volumes. The condensed version omits some ...
A species plate from The Crossley ID Guide: Eastern Birds, illustrating different plumages of the red knot. A field guide is a book designed to help the reader identify wildlife (flora or fauna or funga) or other objects of natural occurrence (e.g. rocks and minerals).
The following is a list of rock types recognized by geologists.There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type.
If the abundances of quartz, feldspars and rock fragments indicate that the rock is an arkose, a subarkose or a lithic arkose, one must then normalize the abundance of feldspars to 100% and attempt to identify the relative abundances of K-feldspars to plagioclase in the sample. If there is more plagioclase than there is K-feldspar, the rock is ...
The use of rock has had a huge impact on the cultural and technological development of the human race. Rock has been used by humans and other hominids for at least 2.5 million years. [22] Lithic technology marks some of the oldest and continuously used technologies. The mining of rock for its metal content has been one of the most important ...
The Galaxy Opal, listed as the "World's Largest Polished Opal" in the 1992 Guinness Book of Records [72] The Rainbow Virgin, "the finest crystal opal specimen ever unearthed" [73] [74] [75] The Sea of Opal, the largest black opal in the world [76] The Fire of Australia, assumed to be "the finest uncut opal in existence" [75] [77]