Figure 1: Altar time-space diagram showing the various porphyry centres, magmatic stages, main porphyry intrusion phases in relation to the alteration and mineralization events. Figure 1: Altar ...
Frederic Wilson receives funding from the U.S. Geological Survey and the National Park Service. He is a Fellow of the Geological Society of America and a member of the Alaska Geological Society Since ...
In what the agency hopes will spur a major leap in American geoscience, the U.S. Geological Survey has released a new mapping tool that allows anyone to peer into the earth beneath their feet. Dubbed ...
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