1. Cores indicate variations of climate, species and sedimentary composition during geologic history . 2. The debate is not the first of this kind in geologic history . 3. These large-scale variations mark distinct geologic histories to the north and south. 4. The origin of the younger plains materials is critical to mercurian geologic history . 5. Each province has its own geologic history and unique features. 6. No record exists for the next 1, 200 million years of Jerome's geologic history . 7. The "'Geology of Kansas "'encompasses the geologic history of the Pennsylvanian and Permian periods. 8. During recent geologic history , the Chuckanut formation was overridden by four or more glaciations. 9. This process has happened over and over in the geologic history of the Earth. 10. It is the quieter, normal events of our geologic history we don't yet understand.
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