1. Because they lack oxygen, marsh sediments are high in sulfides that are toxic to most plants. 由于它们缺乏氧气，沼泽沉积物中的硫化物含量很高，而硫化物对大多数植物都有毒。
2. The Holocene Epoch is characterized by different sediments, ones that form when the climate is warmer. 全新世时期的特征为不同的沉积物，它们在气候变暖时形成。
3. They say the fossils have been moved from their original resting places and redeposited in younger sediments. 他们说，这些化石已经从原来的安息地转移到更年轻的沉积物中。
4. Ocean sediments presented a much more complete geologic record of the Pleistocene than continental glacial deposits did. 相比于大陆冰川沉积物，海洋沉积物提供了更完整的更新世时期的地质记录。
5. After millions of years, powerful geological forces, like underwater volcanoes lift up the ocean sediments to form new land. 数百万年后，强大的地质力量，比如海底火山，会掀起海洋沉积物，形成新的陆地。
