| 11. | In addition to the geophysical survey, core samples and aerial photographs were taken.
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| 12. | Freeport said it drilled seven holes for core samples at Busang.
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| 13. | Back at the Rover, they took another rake sample and a core sample.
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| 14. | Irwin took some manual core samples from around the ALSEP site.
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| 15. | Three expeditions used drilling equipment to take core samples of the coral reef.
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| 16. | I was not aware of any tampering with Busang core samples.
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| 17. | After a core sampling, scientists estimated the tree to be 450 years old.
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| 18. | In 2003, the tree core samples dated the damage to 1965.
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| 19. | A hook is mounted on top side of the core sample.
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| 20. | Under the leadership of Professor Boris Kudryashov, ancient ice core samples were obtained.
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