| 11. | The surface rock in Catawissa Creek largely consists of sedimentary rock, such as sandstone and shale.
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| 12. | At Teberibie, rather than digging deep for rich veins, surface rock is fed into a conveyor-belt crusher.
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| 13. | Today, the once hot magma chamber is exposed surface rock on the northern shore of Lake Superior.
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| 14. | Solid chunks of ochre were ground on a flat but rough surfaced rock to produce the powder.
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| 15. | Other threats include off-road vehicle use, grazing, and the mining of surface rock for use as building stone.
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| 16. | A chain-driven wheel rotates a graded scoop picking surface rocks from the soil and shakes off excess soil.
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| 17. | The Senoueix Bridge is highly likely to have been built on a curve, based on the surfacing rock.
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| 18. | This irregular boundary is sometimes defined as the southern extent of Cenozoic igneous surface rock from the Cascade Range.
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| 19. | This suggests that neon will be a useful tool in determining cosmic exposure ages of surface rocks and meteorites.
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| 20. | Both Pathfinder and its roving vehicle, Sojourner, are operating normally and transmitting pictures and chemical data on surface rocks.
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