petrography
noun
the branch of petrology dealing with the description and classification of rocks, especially by microscopic examination.
petrographic
-
a word derived from
petrography.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The meteorite was classified as a CM1/2 carbonaceous chondrite, placing it between the petrographic CM1 and CM2 categories.
From Science Daily ● Aug. 8, 2026
Results from another technique known as petrographic testing, in which dyes are applied to samples of the concrete core to highlight any microscopic cracking, are still outstanding.
From Los Angeles Times ● Nov. 14, 2023
Then we cut small blocks from the specimens, and from those we were able to prepare petrographic thin sections in three planes.
From Salon ● Jun. 29, 2021
Because they polarize light, calcite crystals are used in special petrographic microscopes for studying minerals and rocks.
From Textbooks ● Jan. 1, 2017
These metamorphic phenomena, though important, are obscure, and their elucidation demands some knowledge of petrographic science, that branch of geology which considers the principles of rock formation.
From Outlines of the Earth's History A Popular Study in Physiography by Nathaniel Southgate Shaler
