Results 111 to 120 of about 17,011 (264)

The emergence and complexification of symbolic practices in the Homo lineage: an archaeological and cognitive perspective Émergence et complexification des pratiques symboliques dans la lignée Homo : une approche archéologique et cognitive

Journal of the Royal Anthropological Institute, EarlyView.
Recent archaeological discoveries, reviewed in this essay, challenge traditional views on the emergence of human symbolic cognition. Once believed to have originated in Europe around 40,000 years ago, new evidence shows it emerged much earlier across diverse regions.
Francesco d'Errico, Ivan Colagè, Larissa M. Straffon, Andrea Bender   +3 more
wiley   +1 more source

Hydrocarbon generation potential evaluation via petrographic and geochemical analyses of El-Maghara coal in Sinai, Egypt. [PDF]

Sci Rep
Salman SA, Abou El-Anwar EA, Makled WA, Mahfouz KH, Belal ZL.   +4 more
europepmc   +1 more source

Geochemical analyses and summaries of shale from Kentucky [PDF]

Open-File Report, 1981
openaire   +1 more source

Automated particle analysis of D.B. Cooper's tie

Journal of Forensic Sciences, EarlyView.
Abstract Automated particle analysis (APA) using scanning electron microscopy (SEM) and energy‐dispersive x‐ray spectrometry (EDS) is a well‐known method in forensics, especially as it is applied to gunshot residue analysis. Here we describe the analysis of particles lifted from D.B. Cooper's tie, which was left on the hijacked plane in 1971.
Thomas G. Kaye, Kent L. Rhodes
wiley   +1 more source

Cautionary Tales for Science‐Based Policy in Deep‐Sea Mining Governance

Global Policy, EarlyView.
ABSTRACT This article examines how low‐certainty scientific claims permeate high‐stakes policy debates before rigorous validation. Using deep‐sea mining governance as a focal domain, the study traces high‐visibility narratives, including the “dark oxygen” hypothesis, radioactive risks of polymetallic nodules, projected impacts of sediment plume ...
Lucía Villar‐Muñoz
wiley   +1 more source

Geochemical analyses and geochemical rock sample location map for the Baker-Cypress area, California [PDF]

Open-File Report, 1980
openaire   +1 more source

Lithic analysis in African archaeology: Advances and key themes

Archaeometry, EarlyView.
Abstract Stone artifacts (lithics) preserve for extended periods; thus they are key evidence for probing the evolution of human technological behaviors. Africa boasts the oldest record of stone artifacts, spanning 3.3 Ma, rare instances of ethnographic stone tool‐making, and stone tool archives from diverse ecological settings, making it an anchor for ...
Deborah I. Olszewski, Amanuel Beyin, Justin Pargeter   +2 more
wiley   +1 more source

Integrated Geophysical and Geochemical Exploration for Gold Mineralization: A Case Study in Lokoja Sheet 247, Ajaokuta L.G.A, Kogi State, Nigeria

Journal of Applied Sciences and Environmental Management
This paper presents an integrated geophysical and geochemical data exploration for  assessing the potential presence of gold in Lokoja Sheet 247, Ajaokuta L.G.A of Kogi State, Nigeria by using interpretation of varying derivatives to delineate ...
O. W. Osisanya, O. B. Shaibu, A. I. Okorode, A. S. Saleh   +3 more
doaj  

Investigating relationships among strontium, barium, and seasonality in wild baboons

Archaeometry, EarlyView.
Abstract Geochemical profiles of Australopithecus africanus and baboon teeth show fluctuating trace elements, possibly reflecting seasonal diets. Here we use laser ablation–inductively coupled plasma–mass spectrometric measurements of calcium‐normalized strontium and barium ratios (Sr/Ca and Ba/Ca) and ion microprobe analyses of oxygen isotopes (δ18O ...
Maya Bharatiya, Christine Austin, Manish Arora, Janaína N. Ávila, Esme K. Beamish, Wendy Dirks, Daniel R. Green, Nicole D. Leonard, W. Scott McGraw, Larissa Swedell, Ian S. Williams, Jian‐xin Zhao, Tanya M. Smith   +12 more
wiley   +1 more source

Development of the spectrographic 30-element geochemical analyses [PDF]

, 1969
openaire   +1 more source