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- Voce pode dar exemplos especificos de casos aonde o
- What has the study of the Coconino Sandstone revealed?
- How do you know the sandstone was not formed from desert dunes, as most geologists believe?
- How do you know the sandstone was not formed from desert dunes, as most geologists believe?
- What about the amount of time required to cool molten rock? Doesn't this present a problem for a short chronology for life on earth?
- Aren't the presence of large crystals in an igneous rock, such as granite indicative of slow cooling rates?
- The Green River Shale consists of millions of thin laminae.Do these represent true annual varves, and do they show sunspot cycles and other cyclical episodes such as Milankovitch cycles?
- What are the geological periods in which the earth history is divided and subdivided, and the principal events that have occurred in each period?