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Law of Crosscutting
Number: 0196 Anonymous: The second rule we will use in reading the rocks is the Law of Crosscutting. This one is so simple that you may think it is silly to even mention it. As we go along, we will...
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Looking at the Present
Number: 0197 Anonymous: An important step in reading the rocks is understanding how they formed. To do that, we look at the places where rocks are forming now. By studying the deposits in rivers,...
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Science Photo of the Day #802
The rocks around our new home have these strange structures of lines tilted at different angles. What caused that?thumb: read more
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Science Photo of the Day #849
Nancy and I recently visited one of the many slot canyons found in Utah. How do these deep, narrow canyons form?thumb: read more
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Science Photo of the Day #863
The cliffs behind our house were once part of an erg. Without looking it up, what is an erg?thumb: read more
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Understanding what "large deposits" means
Anonymous: This part of the definition is not as definite as the other parts. How large is "large?"Back to "What is a Rock?"Sorry, but this content is reserved for subscribers only.The $29.95/year...
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Science Photo of the Day #975
In spite of my lingering vertigo, Nancy and I joined my sister and my niece for a quick trip to the Grand Canyon. The Grand Canyon cuts through many layers of rock, but the Coconino Sandstone is very...
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Igneous Rocks and Bubbles
Anonymous: Click here to use the Slow Connection PlayerBack to Igneous RocksBack to the Rocks Study Unitthumb: Length: 4:10
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Field Trip on the Grand Staircase Escalante National Monument
Now that my vertigo has finally verti-gone, I can get out in the field again without worrying that I will fall on my face (at least any more than usual.) This week I helped with a training session on...
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Science Photo of the Day #978
Several earthquakes have been in the news recently. One in Los Angeles was a 5.1 on the Richter Scale, while one in Yellowstone was a 4.8. How much difference is there between a 4.8 and a 5.1?thumb:...
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