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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?