1. Thin section petrography became the standard method of rock study. 2. The mountain is named for English geologist who specialised in petrology and petrography . 3. His scientific work concentrated mainly on sedimentology and petrography . 4. This inexpensive but time-consuming method, known as petrography , has limitations. 5. He is considered to be one of the pioneers of petrography in the United States. 6. V�lain's major contributions in the field of geology were in petrography and physical geography. 7. In this position he penned many scientific articles on geology, petrography , zoology and botany. 8. Pecora started graduate studies at Harvard University in 1935, concentrating on optical mineralogy and petrography . 9. He earned a Ph . D . in structural geology and petrography from Yale University in 1912. 10. Ceramic petrography is used in academic archaeological research and commercial archaeology to address a range of issues.
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