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