- the branch of petrology dealing with the description and classification of rocks, especially by microscopic examination.
Origin of petrography
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for petrography
A faint buzz above the ceiling witnessed that petrography, too, was active.Ann Veronica
H. G. Wells
Petrog′lyphy, the art of writing on rocks or stones; Petrog′rapher, a student of petrography.
Petrography and laboratory psychology were among the new sciences fostered by the new university.
A more general name sometimes employed is that of Petrography.The Chain of Life in Geological Time
Sir J. William Dawson
Thus from mineralogy and petrography it contains information regarding the origin and subsequent mutations of minerals and rocks.
- the branch of petrology concerned with the description and classification of rocksAbbreviation: petrog
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- The description and classification of rocks, especially by means of microscopic analysis.
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