| 21. | .. . a large portion of the Woongarra land contained more or less loose rocks.
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| 22. | Problems were encountered with ventilation, loose rocks and wet rails, which caused trains to stall.
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| 23. | "It's so hard to fight because there are so many steep grades and loose rocks.
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| 24. | The loose rocks at the base of the wall form what are called scree slopes.
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| 25. | Kettle holes can also occur in ridge shaped deposits of loose rock fragments called till.
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| 26. | On Feb . 6, the party climbs to high camp through loose rocks, snow and ice.
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| 27. | "Some of the loose rock could have been cleaned out, " with more volunteers, Burdette said.
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| 28. | It consisted of bedrock ledges and loose rock.
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| 29. | Up to now, scientists have had close looks only at loose rocks on the Martian surface.
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| 30. | He stepped on a loose rock and slid.
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