| 11. | The valley floor was safe from attack in Roman and modern times.
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| 12. | The thin rendzina soils become richer colluvial deposits in the valley floor.
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| 13. | Cabbage is the principal crop grown on the rich black valley floor.
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| 14. | Snow, however, could fall near valley floors in parts of northern Nevada.
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| 15. | The valley floor is mostly flat with large tracts of arable land.
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| 16. | The valley floor receives and average of 900 mm per year.
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| 17. | The valley floor is covered by windblown dunes, a common sight on Mars.
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| 18. | Both parties were flown to the valley floor about 8 a . m.
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| 19. | Blacktail Butte is a prominent landform rising from the valley floor.
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| 20. | The valley floor is flat and is used intensively for agriculture.
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