| 1. | Most crustal rocks formed before 2.5 billion years ago are located in cratons.
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| 2. | Venus lacks water, which makes crustal rock stronger and helps preserve surface features.
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| 3. | As a result, Rb is enriched in crustal rocks.
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| 4. | Gradually during millions of years, crustal rocks were folded and fractured and the seas driven away.
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| 5. | It also occurs in eclogite xenoliths from kimberlite as well as in crustal rocks metamorphosed at high pressures.
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| 6. | Those lakes mark the edge of a very hard chunk of crustal rock known as the Canadian Shield.
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| 7. | Another drawback of stoping is it cools too rapidly and occurs too slowly for low density crustal rocks.
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| 8. | All crustal rock contains some iron or iron compounds, rendering it ferromagnetic, as do Roman roof tiles and plaster.
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| 9. | Isotope analysis of magmatic rocks have shown Crystal fractionation and melting of upper crustal rocks further complicate the pattern.
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| 10. | Granophyre may also form as the uppermost stratigraphic layer resulting from melting of upper-middle crustal rocks by a meteorite impact.
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