The Dunmore lode is located along a two-mile-long fissure zone averaging 100 feet in width, extending upward across an unconformity separating pre-Cambrian quartzite and overlying Paleogene volcanic tuffs. Structurally, the lode is highly intricate, containing sharply marked fissure veins, sheared quartzite, breccia chimneys, and pebble dikes.
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During the summer of 1900, Elmer S. Riggs, assistant curator of paleontology at the Field Columbian Museum, Chicago (now the Field Museum of Natural History), and field assistants Harold W. Menke and Victor H. Barnett, excavated dinosaur fossils at four quarries between Grand Junction and Fruita, Colorado.
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There be geologic oddities…
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John McPhee’s Draft No. 4 provides great wisdom for readers and writers alike. It’s also a good mantra for geoscience writers!
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Bristlecone-Geo assisted with the preparation of USFS long form mineral potential report for the Mt. Emmons federal land exchange located within the Grand Mesa, Uncompahgre and Gunnison National Forests; and Rio Grande National Forest; Gunnison and Saguache Counties, Colorado.
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