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- 2079 Bhadra · 1 mark
- 2073 Shrawan · 1 mark
Petrography versus petrogenesis
Short answer
Petrography is the systematic description of rocks (composition, texture, structure), while petrogenesis studies their origin and formation. Petrography is descriptive, petrogenesis interpretative.
Differentiate between petrography and petrogenesis (define petrography and petrogenesis).
| Basis | Petrography | Petrogenesis |
|---|---|---|
| Meaning | Systematic description of rocks: mineral composition, texture, structure and classification | Study of the origin and formation of rocks |
| Concerned with | What the rock is like | How and why the rock formed |
| Method | Hand specimen and thin-section microscope | Field relations, experiments and chemistry |
| Example | Granite is coarse-grained, with quartz, feldspar and mica | Granite forms by slow cooling of acidic magma deep underground |
| Nature | Descriptive | Interpretative |
Both are parts of petrology.
✓ Answer checked by Claude Opus 5.5 (high effort)
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