petrography

Examples of petrographic

petrographic
Nevertheless, due to petrographic similarities, we assume that the other eastern ophiolites formed in the same setting.
All other microtube-containing samples have closely comparable petrographic characteristics.
The basalts have distinctive petrographic characteristics such as rounded and skeletal olivine phenocrysts with abundant melt inclusions, implying the mixing of two distinct magmas.
Petrographic analysis will be conducted to assess the textural effects of impact and to constrain the temperature and pressure conditions within the impacted samples.
Chapter 7 examines methods for characterizing sediment sources, using petrographic and in particular geochemical methods of analysis.
After petrographic examination, the freshest 15 samples were selected for whole-rock geochemical analysis.
Hundreds of specimens of organic-walled acritarchs were discovered in petrographic thin sections cut parallel to bedding.
The thin section was also analysed with a petrographic microscope using transmitted, reflected and polarized light.
However, petrographic features cannot be used to distinguish different tuff horizons.
Field determinations were supplemented by petrographic analysis of thin sections.
Our petrographic survey does not indicate the presence of such depleted zones around the charnockite patches.
All three chapters are well-written and well-organized reviews of their subject and illustrated with good quality petrographic images.
In petrographic thin sections cut perpendicular to the bedding, the microfossils appear only as very thin, dark streaks.
There is a continuous petrographic range from essentially anhydrous eclogite to a blueschist metabasite with garnet and sodic amphibole but no omphacite.
Elemental ratios and petrographic evidence indicate possible minor crustal contamination of the suite.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.