Results 211 to 220 of about 105,636 (305)

Late Holocene moisture variability in Arctic Alaska from chitin δ18O

Boreas, EarlyView.
Amplified warming in the Arctic has resulted in reduced sea‐ice extent, which can impact regional climate dynamics. Elucidating past moisture variability in response to changing temperatures and sea‐ice conditions can offer insight into how anthropogenic climate change may impact Arctic areas such as the Alaskan North Slope in the future. We contribute
Briana A. Edgerton, Melissa L. Chipman
wiley   +1 more source

Geochemical Characteristics of Meso-Neoproterozoic-Cambrian Potential Shale Source Rocks and Oil Source Correlation for Paleo-Reservoirs in the Cambrian Formations of the Zhongtiaoshan Area in Southern East of the Ordos Basin. [PDF]

ACS Omega
Liu H, Li C, Feng S, Ma G, Chen X, Huang X.   +5 more
europepmc   +1 more source

Droughts and human impact in the ancient Uaymil region of the Maya lowlands inferred from a 2800‐year sedimentary archive at Lake Kaná, Mexico

Boreas, EarlyView.
The relationship between the climate and societal transformation in Maya lowlands has long been debated, particularly the role of drought in shaping the civilization trajectory during the Classic Period. A high‐resolution, multi‐proxy, geochemical record from Lake Kaná, located in the underexplored Uaymil region of the Yucatán Peninsula in Mexico ...
Haydar B. Martinez‐Dyrzo, Priyadarsi D. Roy, Benjamin Gwinneth, Irma G. Vargas‐Martinez, Alejandro A. Aragon‐Moreno, Roger Medina‐Gonzales   +5 more
wiley   +1 more source

Developing an <i>E. coli</i> heterologous expression system for characterizing a marine debrominase from <i>Roseobacter</i> sp. [PDF]

Appl Environ Microbiol
Li X, Yang S, Liu Y, Huang H, Zhang X, Zhong Y, Adrian L, Peng P.   +7 more
europepmc   +1 more source

High abundance of xanthones and dibenzofurans in a late Permian sediment [PDF]

, 2003
Gilmour, Iain, Sephton, Mark A., Watson, Jonathan S.   +2 more
core  

Thorncliffe Formation: A proglacial to subglacial lacustrine basin sequence, Greater Toronto Region, Canada

Boreas, EarlyView.
Map of Lower sediment (LS) thickness is a surrogate for the distribution of Thorncliffe Formation (TF) and ~75% of TF thickness from the slope of Niagara Escarpment east to Brighton. Inset images show the LS sequence at the Don Valleys brickyards (DVBY) and undeformed TF sand and gravel (~15 m) below Newmarket Till (NT) at sites L and Co.
David R. Sharpe, Charles E. Logan, Ross D. Knight, Andre J.‐M. Pugin   +3 more
wiley   +1 more source

Massive wildfires followed oceanic anoxic events during the Late Devonian Frasnian-Famennian mass extinction. [PDF]

Sci Adv
Lu M, Sun Y, Duan G, Ikejiri T, Liu N, Luo Q, Lv D, Carroll R, Lu Y.   +8 more
europepmc   +1 more source

Using the Transition Assessment Teaching Assistant to Evaluate a Transition from Pump and Treat to MNA

Groundwater Monitoring &Remediation, EarlyView.
Abstract At many sites, chlorinated ethenes in some of the monitoring wells remain above cleanup goals, even though the water produced by the pumped wells of the pump‐and‐treat system meets the goals. Regulators and site risk managers need tools to determine whether it is appropriate to shut‐down the pump‐and‐treat system and transition to monitored ...
John T. Wilson, Barbara Wilson, Mark Ferrey, David L. Freedman, Anangelica Rivera Cruz, Olivia Groshans, Hiroko Hort, David Adamson, Charles Newell   +8 more
wiley   +1 more source

Predicted Bacterial Metabolic Landscapes of the Sumaco Volcano: A Picrust2 Analysis of 16S rRNA Data from Amazonian Ecuador. [PDF]

Microorganisms
Jarrín-V P, Carrión-Olmedo JC, Loján P, Reyes-Barriga D, Lara M, Oña A, Quiroz-Moreno C, Castillejo P, Tenea GN, Díaz M, Monfort-Lanzas P, Molina CA.   +11 more
europepmc   +1 more source

Postcranial anatomy of the Miocene hippopotamoids of Toros‐Menalla, Chad

Journal of Anatomy, EarlyView.
We establish a framework for the identification of postcranial remains in hippopotamoids by describing and comparing for the first time two late Miocene hippopotamoids from Toros‐Menalla, Chad (Hexaprotodon garyam, an early hippopotamid, and Libycosaurus bahri, the last African anthracothere) with the common hippopotamus.
Lorenzo Scribano, Fabrice Lihoreau, Alexandra Houssaye, Clarisse Nekoulnang Djetounako, Jean‐Renaud Boisserie   +4 more
wiley   +1 more source