D
Dennis W. Powers
Researcher at University of Mississippi
Publications - 28
Citations - 1466
Dennis W. Powers is an academic researcher from University of Mississippi. The author has contributed to research in topics: Halite & Sedimentary depositional environment. The author has an hindex of 16, co-authored 28 publications receiving 1403 citations. Previous affiliations of Dennis W. Powers include Princeton University & Sandia National Laboratories.
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Journal ArticleDOI
Isolation of a 250 million-year-old halotolerant bacterium from a primary salt crystal
TL;DR: The isolation and growth of a previously unrecognized spore-forming bacterium (Bacillus species, designated 2-9-3) from a brine inclusion within a 250 million-year-old salt crystal from the Permian Salado Formation is reported.
Journal ArticleDOI
The anatomy of Dolichocebus gaimanensis, a stem platyrrhine monkey from Argentina
Richard F. Kay,John G. Fleagle,T. R.T. Mitchell,Matthew W. Colbert,Tom Bown,Dennis W. Powers +5 more
TL;DR: A comprehensive phylogenetic analysis of fossil material from the Trelew Member of the Sarmiento Formation suggests a more layered evolutionary pattern, with several independent extinct clades filling modern platyrrhine niche space, and modern platyrhine families and subfamilies appearing over a nine-million-year interval in the Miocene.
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Improved Methodology for Using Embedded Markov Chains to Describe Cyclical Sediments
TL;DR: In this article, the authors apply Goodman's (1968) model of quasi-independence and compare it to previously used methods (which they now believe are invalid) in the geological literature, and present tests for homogeneity, a spatial analogue to stationarity, of multiple embedded chains and for symmetry and Markov chain order.
Journal ArticleDOI
New evidence for 250 Ma age of halotolerant bacterium from a Permian salt crystal
Cindy L. Satterfield,Tim K. Lowenstein,Russell H. Vreeland,William D. Rosenzweig,Dennis W. Powers +4 more
TL;DR: In this article, it was shown that brine inclusions from the same layer of salt that housed Virgibacillus sp. 2-9-3 are composed of evaporated Late Permian seawater that was trapped in halite cement crys-tals precipitated syndepositionally from shallow groundwater brines at temperatures of 17-37 8C.
ReportDOI
Geological characterization report: Waste Isolation Pilot Plant (WIPP) site, southeastern New Mexico
TL;DR: In this article, a volume covering hydrology, geochemistry, resources, special studies of WIPP repository rocks, and continuing studies is presented, focusing on hydrological, geochemical, and resource resources.