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Album caption: Hydraulic mining on the North Fork of Harrison Creek,Circle quadrangle,Alaska,1980 Published as figure G4. U.S. Geological Survey. Bulletin 1857G. 1989.
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Album caption: Lower gravel exposed in hydraulic pit at Little York Diggings. Imbrication of cobbles and boulders indicates current flow was from southeast to northwest (left to right). view southwest. Nevada County, California. circa. 1967. Published as figure 26 in U. S. Geological Survey. Professional paper 772. 1974.
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Album caption: Buried pre-Bull Lake(?) soil (pbs) developed on fine-grained alluvium overlying alluvial gravels (ag). The buried soil is overlain by Pinedale(?) alluvial gravel (pag). Exposed in roadcut on northeast side of Taughenbaugh Mesa (Rifle quadrangle, north of area).(Graphics on published photograph). n.d. Published as figure 7. U.S.Geological Survey. Professional paper 617. 1969.
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Album caption: Till of the Grand Mesa Formation (Qgt) overlying weathered loess (wl) on till of the Lands End Formation. Exposed in roadcut on west side of Cottonwood Creek, elevation 6,220 feet. Notice the blocky, semiprismatic structure in the weathered loess. (Graphics on published photograph). n.d. Published as figure 10. U.S. Geological Survey. Professional papper 617. 1969.
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Album caption: Lower gravel in the Badger Hill hydraulic pit. View is west near northernmost part of pit. Gravel is exposed on side of pit, and bedrock slopes up steeply beneath gravel. Gravel-bedrock contact is not exposed but probably is 20-30 feet below lowest exposure of coarse gravel. Largest boulders exposed are 3 feet in diameter. Note aluminum notebook for scale. Nevada County, California. circa. 1967. Published as figure 11 in U. S. Geological Survey. Professional paper 772. 1974.
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Album caption: Lower gravel exposed on east side of hydraulic pit at Indiana Hill. Note imbrication in coarse lower gravel indicating current flow right to left (south to north). view east. Nevada County, California. circa. 1967. Published as figure 25 in U. S. Geological Survey. Professional paper 772. 1974.
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Album caption: Talus creep (?) near divide between Leroux Creek and Leon Creek drainages. Note disrupted soil at leading edge of talus field. n.d. Published as figure 25. U. S. Geological Survey. Professional Paper 617. 1969.
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Album caption: Lower gravel exposed in the hydraulic pit at Moore's Flat. Boulders 6 feet in diameter (note rock hammer on left boulder) are porphyritic granite. Bedrock is below bottom of picture. Nevada County, California. circa. 1967. Published as figure 9 in U. S. Geological Survey. Professional paper 772. 1974.
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Album caption: Terraces of Kansas Mesa (Qam, middle pre-Bull Lake(?)) and Mormon Mesa (Qao, older pre-Bull Lake(?)). A low terrace (Qgam, middle Pinedale(?)) is visible near Plateau Creek. (Graphics on published photograph). n.d. Published as figure 6.. U. S. Geological Survey. Professional Paper 617. 1969.
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Album caption: Surface of soil developed on gold-bearing gravel. Note subrounded pebbles of quartz and siliceous phyllite weathering out of the alluvial gravel. Such subtle evidence as differences in degree of roundness or angularity (comare photo 3) is used in locating gravel-bedrock contacts. Eyeglass case indicates scale. Nevada County, California. circa. 1967. Published as figure 6 in U. S. Geological Survey. Professional paper 772. 1974.
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Album caption: View west over Crag Crest and the surface of Grand Mesa. Slumped and glaciated topography borders the mesa on both the north and south. Talus is common at the base of the basalt cliffs. n.d. Published as figure 20. U. S. Geological Survey. Professional Paper 617. 1969.
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Album caption: View west over the landslide bench (outlined) adjacent to Grand Mesa. Mesa Lakes are in the center of the picture on the landslide bench (Graphics on published photograph). n.d. Published as figure 18. U. S. Geological Survey. Professional Paper 617. 1969.
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Album caption: Recent slides on new road to Mesa Lakes.Developed in till and claystones of the post-Green River unnamed unit. n.d. Published as figure 29. U. S. Geological Survey. Professional Paper 617. 1969.
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Album caption: The isolated basalt remnant of North Mamm Peak on Battlement Mesa. Toreva-block slides and frost breakup of the basalt have all but destroyed the original basalt surface. n.d. Published as figure 21. U. S. Geological Survey. Professional Paper 617. 1969.
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Album caption: Recent slump in till along new road to Mesa Lakes. n.d. Published as figure 28. U. S. Geological Survey. Professional Paper 617. 1969.
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Album caption: A small gold mining operation located in hydraulic pit of the ancestral Yuba River 1 mile northeast of French Corral. Blue gravel is exposed in a hole in the foreground where the water table was intersected. Note darker colored wet ground. Nevada County, California. circa. 1967. Published as figure 32 in U. S. Geological Survey. Professional paper 772. 1974.
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Album caption: Fluted and scoured granitic bedrock floor of the once gravel-filled channel exposed in a hydraulic pit near Peterson's Corner 2 miles southwest of North San Juan. The overlying gravel was removed by hydraulic mining in the late 1800's. The river flowed toward the observer. Nevada County, California. circa. 1967. Published as figure 4 in U.S. Geological Survey. Professional paper 772. 1974.
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Album caption: Till plain (tp) at the mouth of Cottonwood Creek. View southwest over Plateau Creek. (Graphics on published photograph). n.d. Published as figure 14. U.S.Geological Survey. Professional paper 617. 1969.
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Album caption: Aerial view northeast over the Kahnah Creek embayment and Carson Reservoir. The terminal moraine (tm) left by the Grand Mesa ice can be traced from the main part of Grand Mesa on the left down into the embayment and up onto the Flowing Park Lobe of the mesa on the right. A recessional moriane (rm) produced by a withdrawal of the ice sheet in Grand Mesa time is behind Carson Reservoir. (Graphics on published photograph). n.d. Published as figure 12. U.S. Geological Survey. Professional paper 617.1969.
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Album caption: Boulders are as much as 10 feet in diameter near the floor of the Malakoff hydraulic pit. View is north across lake in the west end of pit. Boulders are siliceous phyllite similar to bedrock in area. Nevada County, California. circa. 1967. Published as figure 10 in U. S. Geological Survey. Professional paper 772. 1974.


map background search result map search result map Fluted and scoured granitic bedrock floor Nevada County, California. circa. 1967. Surface of soil developed on gold-bearing gravel. Nevada County, California. circa. 1967. Boulders are as much as 10 feet in diameter near the floor of the Malakoff hydraulic pit. Nevada County, California. circa. 1967. Lower gravel exposed in the hydraulic pit at Moore's Flat. Nevada County, California. circa. 1967. Lower gravel in the Badger Hill hydraulic pit. Nevada County, California. circa. 1967. Lower gravel exposed on east side of hydraulic pit at Indiana Hill. Nevada County, California. circa. 1967. Lower gravel exposed in hydraulic pit at Little York Diggings. Nevada County, California. circa. 1967. A small gold mining operation located in hydraulic pit Nevada County, California. circa 1967. Terraces of Kansas Mesa (Qam, middle pre-Bull Lake(?) and Mormon Mesa (Qao, older pre-Bull Lake(?)). Buried pre-Bull Lake(?) soil (pbs) developed on fine-grained alluvium overlying alluvial gravels (ag). Till of the Grand Mesa Formation (Qgt) overlying weathered loess (wl) on till of the Lands End Formation. Aerial view northeast over the Kahnah Creek embayment and Carson Reservoir. Till plain (tp) at the mouth of Cottonwood Creek. View west over the landslide bench (outlined) adjacent to Grand Mesa. View west over Crag Crest and the surface of Grand Mesa. The isolated basalt remnant of North Mamm Peak on Battlement Mesa. Talus creep (?) near divide between Leroux Creek and Leon Creek drainages. Recent slump in till along new road to Mesa Lakes. n.d. Recent slides on new road to Mesa Lakes. n.d. Hydraulic mining on the North Fork of Harrison Creek,Circle quadrangle,Alaska,1980. Fluted and scoured granitic bedrock floor Nevada County, California. circa. 1967. Surface of soil developed on gold-bearing gravel. Nevada County, California. circa. 1967. Boulders are as much as 10 feet in diameter near the floor of the Malakoff hydraulic pit. Nevada County, California. circa. 1967. Lower gravel exposed in the hydraulic pit at Moore's Flat. Nevada County, California. circa. 1967. Lower gravel in the Badger Hill hydraulic pit. Nevada County, California. circa. 1967. Lower gravel exposed on east side of hydraulic pit at Indiana Hill. Nevada County, California. circa. 1967. Lower gravel exposed in hydraulic pit at Little York Diggings. Nevada County, California. circa. 1967. A small gold mining operation located in hydraulic pit Nevada County, California. circa 1967. Terraces of Kansas Mesa (Qam, middle pre-Bull Lake(?) and Mormon Mesa (Qao, older pre-Bull Lake(?)). Buried pre-Bull Lake(?) soil (pbs) developed on fine-grained alluvium overlying alluvial gravels (ag). Till of the Grand Mesa Formation (Qgt) overlying weathered loess (wl) on till of the Lands End Formation. Aerial view northeast over the Kahnah Creek embayment and Carson Reservoir. Till plain (tp) at the mouth of Cottonwood Creek. View west over the landslide bench (outlined) adjacent to Grand Mesa. View west over Crag Crest and the surface of Grand Mesa. The isolated basalt remnant of North Mamm Peak on Battlement Mesa. Talus creep (?) near divide between Leroux Creek and Leon Creek drainages. Recent slump in till along new road to Mesa Lakes. n.d. Recent slides on new road to Mesa Lakes. n.d. Hydraulic mining on the North Fork of Harrison Creek,Circle quadrangle,Alaska,1980.