| 11. | All three types of microfossil morphologies are found in cherts.
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| 12. | This plant grows on sandy soils that originated from sandstone and chert.
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| 13. | Chert nodules are found near the top of the formation.
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| 14. | The chert units are notable for their very thick beds.
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| 15. | Paleo Indians carried spears with fluted points made of black chert or jasper.
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| 16. | Majority of the waste flakes are made from chert.
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| 17. | Lake Magadi is also well known for its extensive deposits of siliceous chert.
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| 18. | It has been suggested that the round rocks are chert concretions or nodules.
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| 19. | These, therefore, may represent a type of exhalite chert or spilite.
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| 20. | Chert, jasper and quartzite were often used by humans during this period.
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