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Upper part of Mesaverde formation, 1,500 feet thick in Canyon of the Grand (Colorado) River east of Palisades, a typical view of the sandstones that overlie the coal-bearing beds. Mesa County, Colorado. 1907. Plate 2-B in U.S. Geological Survey. Bulletin 510. 1912.
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Canyon of North Fork of Gunnison River, near Somerset, looking eastward; showing canyon walls, 2000 feet high, consisting principally of sandstones in upper part of Mesaverde formation. The northward-facing brush covered slopes appear at the right and the rock exposures in the southward-facing slopes at the left. Gunnison County, Colorado. 1907. Plate 7-A in U.S. Geological Survey. Bulletin 510. 1912.
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Fossil plants associate with the low grade, bituminous and subbituminous coals of the Grand Mesa field (from the Paonia shale member of Mesaverde formation). Figure 1. (upper left); fragments of Myica torrey Lesq. (natural size) and Ficus specioissima Ward. Fossil plant locality record of the United States Geological Survey No. 4383. Figure 2. (lower right); Myrica torrey Lesq. Natural size. Figure 3 (center) Geonomites ungeri Lesq. Palm leaf. Natural size. Fossil plant locality record of the U.S. Geological Survey No. 4336. Gunnison County, Colorado. 1907. Plate 18 in U.S. Geological Survey. Bulletin 510. 1912.
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Exposure of rocks north of Mount Gunnison, showing the basal conglomerate of the Wasatch ("Ruby") formation, the unconformity at the base Wasatch, the Ohio Creek conglomerate, the unconformity at its base and the upper or undifferentiated part of the Mesaverde formation. (Scale: the trees are 50 to 75 feet high.) Gunnison County, Colorado. 1907. Plate 6-A in U.S. Geological Survey. Bulletin 510. 1912.
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Baxter basin near head of Slate River. The coal crop outs in the snow covered slope in the foreground. The "barren measures" overlying the coal beds appear in the cliffs. Gunnison County, Colorado. June, 20, 1909. Plate 13-A in U.S. Geological Survey. Bulletin 510. 1912.
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Hill consisting of Mancos shale near Delta, illustrating the barrenness of the shale slopes, and showing the occurrence of a zone of black shale about 300 feet above the base of the formation. Delta County, Colorado. 1907. Plate 4-A in U.S. Geological Survey. Bulletin 510. 1912.
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Promontory south of Palisades, altitude 1,000 feet: showing the upper part of the Mancos shale and the lower part of the Mesaverde formation, including the Rollins sandstone member and the Bowie shale member, with coal near the base and sandstone cliff above. Mesa County, Colorado. 1907. Plate 2-A in U.S. Geological Survey. Bulletin 510. 1912.
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Mount Carbon, a laccolith of porphyry intruded into the coal measures. Porphyry was intruded at about the horizon of coal and displaced some or all of the coal beds. The north slope at the right is probably the original upper surface of the intruded mass. At the extreme right the sedimentary rocks are upturned on the flanks of the laccolith. Gunnison County, Colorado. 1907. Plate 12-A in U.S. Geological Survey. Bulletin 510. 1912.
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The Cliff, a sheet of igneous rock, about 1,000 feet thick intruded into the coal bearing formation in Coal Creek canyon. Coal Creek canyon and Mount Gunnison appear at the left. The outcrops of the coal are covered by the slide shown in the foreground. (Scale: The trees in the face of the cliff are about 50 feet high) Gunnison County, Colorado. 1907. Plate 9-B in U.S. Geological Survey. Bulletin 510. 1912.
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West slope of Paine mesa, showing an old graded surface dissected by erosion which has revealed the underlying rocks of unequal hardness. Delta County, Colorado. 1907. Plate 5-A in U.S. Geological Survey. Bulletin 510. 1912.
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An intrusive sheet of igneous rock in Coal Creek canyon that has metamorphosed the under lying bed of coal. Gunnison County, Colorado. 1907. Plate 9-A in U.S. Geological Survey. Bulletin 510. 1912.
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A fossil plant (Ficus speciosissima Ward) associated with the low grade bituminous and subbituminous coals of the Grand Mesa field. A fossil leaf common in the Paonia shale member of the Mesaverde formation. Fossil plant locality record of the U.S. Geological Survey No. 4352 (slightly reduced) Gunnison County, Colorado. 1907. Plate 19 in U.S. Geological Survey. Bulletin 510. 1912.
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Landslide in Coal Creek canyon. Showing the wooded condition of the surface in the coal-bearing zone. The coal beds, which elsewhere are obscured by the dense thickets of trees and brush, are exposed at this slide. (Scale: See the man on horseback at base of slide.) Gunnison County, Colorado. 1907. Plate 10 in U.S. Geological Survey. Bulletin 510. 1912.
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West slope of Grand Mesa, 2 miles north of Kahnah Creek, a characteristic exposure showing the slope of the mesa covered with brush except where a washout has exposed the rocks; Mancos shale; sandstone at the base of the coal measures; locality where fossil plants were collected. Mesa County, Colorado. 1907. Plate 3-A in U.S. Geological Survey. Bulletin 510. 1912.
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North wall of Gunnison Canyon at mouth of Wells gulch, showing the lower or flaggy member of the Gunnison formation, overlain by variegated shale and the unconformity, and conglomerate at the base of the Dakota sandstone. Delta County, Colorado. 1907. Plate 4-B in U.S. Geological Survey. Bulletin 510. 1912.
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Escarpment of coal bearing rocks, 3 miles south of Palisades, showing the Paonia shale member of the Mesaverde formation lying unconformably upon the Bowie shale member of the same formation. The rocks above contain coal associated with fossil plants and fresh water mollusks. The sandstone below contains marine shells. Mesa County, Colorado. 1907. Plate 5-B in U.S. Geological Survey. Bulletin 510. 1912.
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Typical exposure of coal bearing rocks east of Paonia, showing the lower three members of the Mesaverde formation, the Rollins sandstone, the Bowie shale, which here contains seven beds of coal, the Paonia shale, containing three beds of coal. The basal sandstone is about 200 feet thick. Delta County, Colorado. 1907. Plate 7-B in U.S. Geological Survey. Bulletin 510. 1912.
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Cliff Creek canyon and Mount Lombard. The coal outcrops near the bottom of the canyon and extends under the igneous rocks about 6,000 feet below the top of the mountain. The stream of fragmental rocks is 1.5 miles long and makes a vertical descent of 4,800 feet. Gunnison County, Colorado. 1907. Plate 8-A, with diagram, in U.S. Geological Survey. Bulletin 510. 1912.
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Robinson Canyon and Mount Gunnison. Mount Gunnison at left, showing the character of the slopes in which the coal beds outcrop. The smooth brush slope in foreground is formed on shale, which here contains seven beds of coal. The cliff above this slope makes the base of the unproductive measures overlying the coal. Gunnison County, Colorado. 1907. Plate 8-B in U.S. Geological Survey. Bulletin 510. 1912.
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Schuylkill Mountain, near head of Slate River. The outcrops of the coal beds are covered by the talus slopes shown in the foreground. The mountain consists of the unproductive measures overlying the coal. Fault has occurred at the points marked. Gunnison County, Colorado. 1907. Plate 13-B in U.S. Geological Survey. Bulletin 510. 1912.