| 11. | Living organisms have well-adapted structures and materials over geological time through natural selection.
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| 12. | It has not erupted since 1859, only an instant in terms of geological time.
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| 13. | The museum also maintains a " Geological Time Clock ".
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| 14. | A number of magmatic features are present in the Circum-Superior Belt, including geological time span.
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| 15. | The geological time covered in part three explores the ages of the Earth and the Sun.
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| 16. | The galactic year provides a conveniently usable unit for depicting cosmic and geological time periods together.
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| 17. | This discovery pushes the date for their appearance back to the earliest part of geological time.
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| 18. | The Everglades were formed relatively recently, about 10, 000 years ago, an eye-blink in geological time.
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| 19. | The valley gives its name to the Hirnantian Age in the Ordovician Period of geological time.
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| 20. | Hardly, Wilson said : " On a geological time scale, ( exfoliation is ) fairly common.
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