| 单词 | rock fragment |
| 释义 | rock fragment The inner boundary of a weathering rind approximately parallels the outer surface of the rock fragment in which it has developed. Retrieved from Wikipedia CC BY-SA 3.0 During the excavation, a portion of a charcoal drawing on a rock fragment was found which was radiocarbon dated at 28,000 years. Retrieved from Wikipedia CC BY-SA 3.0 These can include grains which are sand-sized themselves (a granitic rock fragment), or finer-grained materials (shale fragments). Retrieved from Wikipedia CC BY-SA 3.0 The term greywacke can be confusing, since it can refer to either the immature (rock fragment) aspect of the rock or the fine-grained (clay) component of the rock. Retrieved from Wikipedia CC BY-SA 3.0 They noticed deposits of green molten rock fragments sandwiched between sandstones almost 1.2 billion years old. Times, Sunday Times |
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