Land Resources


Filter Total Items: 194
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Year Published: 2001

Surficial geology of the lower Comb Wash, San Juan County, Utah

The surficial geologic map of lower Comb Wash was produced as part of a master’s thesis for Northern Arizona University Quaternary Sciences program. The map area includes the portion of the Comb Wash alluvial valley between Highway 163 and Highway 95 on the Colorado Plateau in southeastern Utah. The late Quaternary geology of this part of the...

Longpré, Claire I.
Surficial geology of the lower Comb Wash, San Juan County, Utah; 2001; OFR; 2001-424; Longpré, Claire I.

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Year Published: 2000

Climatic variability in the eastern United States over the past millennium from Chesapeake Bay sediments

Salinity oscillations caused by multidecadal climatic variability had major impacts on the Chesapeake Bay estuarine ecosystem during the past 1000 yr. Microfossils from sediments dated by radiometry (14C, 137Cs, 210Pb) and pollen stratigraphy indicate that salinity in mesohaline regions oscillated 10-15 ppt during periods of extreme drought (low...

Cronin, Thomas M.; Willard, Debra A.; Karlsen, A.; Ishman, S.; Verardo, S.; McGeehin, John; Kerhin, R.; Holmes, C.; Colman, S.; Zimmerman, A.