Zobrazeno 1 - 10
of 183
pro vyhledávání: '"Walter E. Dean"'
Publikováno v:
Chemical Geology. 389:153-166
Manganoan siderite ([Fe,Mn]CO 3 ) occurs in abundance of up to 19% (dry weight) as the sole endogenic carbonate within a succession of Holocene, organic-rich, varved sediments from freshwater Otter Lake (OL), Michigan. Radiocarbon dating and varve co
Publikováno v:
Geological Society of America Abstracts with Programs.
Autor:
Xiaoqiao Wan, Walter E. Dean, Stephan A. Graham, Robert W. Scott, Yongjian Huang, Laiming Zhang, Chengshan Wang, Huaichun Wu, Pujun Wang
Publikováno v:
Earth-Science Reviews. 126:275-299
Cretaceous climate data of the long-lived Cretaceous Songliao Basin (SB) in eastern Asia is correlated and compared with the Western Interior Seaway (WIS) on the northern American plate, in order to understand better the dynamics of the Earth's past
Publikováno v:
Quaternary Science Reviews. 66:112-122
Shells from adult specimen of the benthic ostracodes Limnocytherina sanctipatricii and Leucocythere mirabilis selected from a 8.7 m long piston core provide continuous stable oxygen and carbon records for the past approximately 16 ka. Oxygen isotopes
Autor:
Mitchell J. Power, Brandi Bracht-Flyr, Jeffery R. Stone, Cathy Whitlock, Walter E. Dean, Kenneth L. Pierce, Lora Stevens, Sherilyn C. Fritz, Joseph R. Rosenbaum
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. :90-103
article i nfo A 9400-yr-old record from Crevice Lake, a semi-closed alkaline lake in northern Yellowstone National Park, was analyzed for pollen, charcoal, geochemistry, mineralogy, diatoms, and stable isotopes to develop a nu- anced understanding of
Autor:
Lisa A. Doner, Walter E. Dean
Publikováno v:
Journal of Paleolimnology. 47:29-42
Little Shingobee Lake and Fen are part of the extensive network of lakes and wetlands in the Shingobee River headwaters of northwestern Minnesota, designed to study the interactions between surface and ground waters. Prior to about 11.2 cal. ka, most
Publikováno v:
Quaternary Science Reviews. 29:2325-2339
Proxy evidence at decadal resolution from Late Holocene sediments from Pickerel Lake, northeastern South Dakota, shows distinct centennial cycles (400e700 years) in magnetic susceptibility; contents of carbonate, organic carbon, and major elements; a
Publikováno v:
Marine Micropaleontology. 72:176-195
article i nfo abruptly during the Bolling-Allerod (Bo-Al) warm interval (14.7-12.9 cal ka), declined during the Younger Dryas (YD) cold interval (12.9 to 11.7 cal kyr BP), and rose again during the earliest Holocene. At this site, the record after ~1
Publikováno v:
Geology. 37:695-698
Annually laminated (varved) Holocene sediments from Derby Lake, Michigan, display variations in endogenic calcite abundance reflecting a long-term (millennial-scale) decrease in burial punctuated with frequent short-term (decadal-scale) oscillations
Autor:
Lora Stevens, Sherilyn C. Fritz, Mitchell J. Power, Joseph G. Rosenbaum, Cathy Whitlock, Walter E. Dean, Brandi Bracht
Publikováno v:
Quaternary International. 188:126-138
Geochemical, stable-isotope, pollen, charcoal, and diatom records were analyzed at high-resolution in cores obtained from Crevice Lake, a varved-sediment lake in northern Yellowstone National Park. The objective was to reconstruct the ecohydrologic,