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164511 results.

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Page 5903, results 147551 - 147575

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Veins in the northern part of the Boulder batholith, Montana
D. M. Pinckney
1965, Open-File Report 65-123
About 20 miles north of Butte and extending nearly to Helena, is an area of 350 square miles containing hundreds of veins and altered zones. The bedrock of the area is 1) late Cretaceous volcanic rocks, forerunners of the Boulder batholith, 2) the Boulder batholith of late Cretaceous to early...
Geology and ground water of the Tualatin Valley, Oregon
D. H. Hart, R. C. Newcomb
1965, Water Supply Paper 1697
The Tualatin Valley proper consists of broad valley plains, ranging in altitude from 100 to 300 feet, and the lower mountain slopes of the drainage basin of the Tualatin River, a tributary of the Willamette River in northwestern Oregon. The valley is almost entirely farmed. Its population is increasing rapidly,...
Water resources of the Humboldt River Valley near Winnemucca, Nevada
Philip M. Cohen
1965, Water Supply Paper 1795
This report, resulting from studies made by the U.S. Geological Survey as part of the interagency Humboldt River Research Project, describes the qualitative and quantitative relations among the components of the hydrologic system in the Winnemucca Reach of the Humboldt River valley. The area studied includes the segment of the...
Summary of ground-water conditions in Michigan in 1964
P.R. Giroux, G.C. Huffman
1965, Open-File Report 65-63
The purpose of this report is to make available records of groundwater level changes in the principal aquifers of the State during 1964 and compile other related data, such as ground-water pumpage, data on municipal, public and industrial water supply facilities, and the effects of precipitation on ground-water levels. Records...