21. Lunar rock samples contained no hint of water. 22. Rock samples may one day give the answer.23. Naturally, geologists prefer actual rock samples to photographs. 24. In geology and geophysics, the most common method for consolidated rock samples is the divided bar. 25. Mudloggers usually go out and check the shakers for rock samples that have circulated from bottom. 26. Lander with a 400 kg ascent stage will return up to of surface and rock samples . 27. Officials said this schedule included tentative plans for dispatching an unmanned craft to bring back rock samples . 28. Colbeck and three officers landed on the island where they collected rock samples and had a drink. 29. He breathlessly showed him a rock sample , then literally bet his job that oil would be found. 30. The University's Austin and Midland centers house more than 1 . 2 million boxes of rock samples .
