| 1 | The experts did a painstaking sifting of debris. | |
| 2 | Rapid melting of the snow saturated debris in a large landslide. | |
| 3 | Yellowstone National Park has one of the world's largest petrified forests, | |
| 4 | The cuttings collected from the shale shaker should be cleaned before fluorescence analysis. | |
| 5 | This new knowledge was available through the medium of microscopic examination of the sample cuttings . |