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| Geology time-out: The principle of cross-cutting relationships is very evident here. The quartz vein is younger than the meta-sedimentary rocks that it intrudes. The rock hammer shadow is for scale. The upheaval of the rocks from horizontal left cracks in the rock into which the hydrothermal fluids intruded. |
| Date: 1/31/09 4:42 PM | ISO: 100 | Exp. Time: 1/125s | Aperture: 5.6 | Focal Length: 14.0mm |
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