Layers

This is a pit that has been dug into the ground at Cotopaxi, a big strato volcano near Quito, the capital city of Ecuador. The pit is about 2 meters deep and in it you can clearly see a number of ash layers exposed. It is also easy to see that the layers are different - some are coarse and others are fine, some are dark-colored and others are light-colored. No lava flows are exposed in this pit, but one 2 meter-deep pit doesn't really do a very good job of sampling an entire volcano.

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