petrographical Meaning in Hindi (शब्द के हिंदी अर्थ)
petrographical ka kya matlab hota hai
पेट्रोग्राफिकल
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petrographical's Usage Examples:
The petrographical microscope is shown in fig.
They contain shells of molluscs now inhabiting the Sea of Aral, and in their petrographical features are exactly like those of the lower Volga.
As a stratigraphical geologist he rendered much assistance on the Geological Survey of France, but in the course of time he gave his special attention to the study of volcanic phenomena and earthquakes, to minerals and rocks; and he was the first to introduce modern petrographical methods into France.