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776 - 800 of 881 Items << < 27 28 29 30 31 32 33 34 35 36 > >>
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We characterized the structure and composition of unmanaged riparian forests in three river basins in Oregon’s coastal mountains. Our objective was to evaluate stand attributes at three spatial scales: streamside (site), drainage network (stream...
1999 (iso8601)
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Fire history and fire regimes were reconstructed for a 450 km² area in the central
western Oregon Cascades, using tree-ring analysis of fire scars and tree origin years at
137 sampled clearcuts. I described temporal patterns of fire frequency,...
1998-08-24 (iso8601)
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The links between forests, streamflow, and climate are poorly understood. Despite hundreds of studies over the past 60 years, fundamental questions of forests' effects on the hydrologic cycle remain unanswered. The hydrological cycle involves...
2009-06-17T17:39:11Z (iso8601)
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During the last decades, there has been increasing interest in ground-based
mechanized harvesting systems in the western United States as harvest of second growth
increased. A major reason for that interest is that labor productivity using...
1998-01-15 (iso8601)
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Stream buffer strips are an important tool for protecting the stream environment. This research documents the losses from 40 stream buffer strips, in the Western Cascades of Oregon, established 1 to 15 years before the study. Predictive equations...
1977-06-22 (iso8601)
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Many topographic units in the state of Oregon have been only partially explored botanically and very few areas have been collected intensively. Two such areas were selected and a detailed investigation was made of the vegetation. Fairview Mountain...
1949-04-16 (iso8601)
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Throughout the 20th century, windthrow has affected forests in the Bull Run watershed, a 26,500 ha basin that is the principal water source for the city of Portland, Oregon. Windthrow from storms in 1973 and 1983 was mapped into a geographic...
1996-05-10 (iso8601)
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Four formations of the Cretaceous Nanaimo Group crop out on Galiano Island and on Parker and Gossip Islands, nearby. These formations are: early Campanian Geoffrey Formation which encloses a tongue of the Northumberland Formation; early Campanian...
1976-06-03 (iso8601)
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Rio Grande, New Mexico. Shows plan and profile of the Rio Grande from Otowi Station to Embudo Creek. Topography by D. H. Griswold, G. R. Griswold, and W. C. G. Senkpiel. Surveyed in 1933-1935. 1 plan sheet & 1 profile sheet. Sheet 1 of 2.
2024-05-05
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58 x 47 cm., on sheet 74 x 84 cm., folded in envelope 30 x 24 cm. Relief shown by contours and spot heights. "Bedrock geology mapped by B.C. Burchfiel, 1961, and by E.J. McKay and K.A. Sargent, 1965-66. Surficial geology mapped by A.T. Fernald,...
1970-05-05
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57 x 46 cm., on sheet 83 x 91 cm., folded in envelope 30 x 24 cm. Relief shown by contours and spot heights. "Geology mapped in 1963." Includes 2 colored cross sections, index map, text, and quadrangle location map. "Prepared in cooperation with...
1966-05-05
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37 x 50 cm. Relief shown by hachures and spot heights "Atlas sheet no. 77(B)." "Issued May 7th 1877." "Expeditions of 1871 & 1786 under the command of 1st. Lieut. Geo. M. Wheeler, Corps of Engineers, U.S. Army." "Weyss, Herman & Lang, del." "By...
1877-05-07
1881-06-30 |
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At bottom of map: 'Base compiled from plane-table sheets, topographic maps of U.S. Geological Survey, railroad alignments, and General Land Office data.' Relief shown by hachures and spot heights. Shows township and range grid. Covers from...
2024-05-05
2024-05-05 |
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Reconnaissance map of eastern Nevada.
1869-05-05
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Map showing the locations of springs, wells, and waterlines in Las Vegas in 1940.
1940-05-01
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Document: Appendices to Pacific Southwest Water Plan Review Draft "U.S. Geological Survey Appendix", August 1963, page 13
1963-08-01
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Document: "Pacific Southwest Water Plan Supplemental Information on Marble Canyon Project" December 1963, page 37
1963-12-01
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Document: Appendix to Pacific Southwest Water Plan of August 1963 as modified January 1964 "Geological Survey", January 1964, page 1
1964-01-01
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Document: United States Department of the Interior, Bureau of Reclamation, Memorandum Report, Lower Colorado River Perfection, Region 3, A.B. West, Regional Director, Boulder City, Nevada, March 1963, page 7
1963-03-01
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99. Last Chance Creek; mouth at mile 49.4 River Map Sheet D, Cummings Mesa and Gunsight Butte quads USGS 1953; as late as 1886, Last Chance Creek was portrayed on the maps as draining the eastern slopes of Kaiparowits rather than the western...
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Next day, November 6, the Spaniards rounded the tip of this mesa (Sec 33 T43S R5E) whence they were afforded distant spectacular views in three directions. Beginning in the west and running counter clockwise around the horizon they might have seen...
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