Results 171 to 180 of about 42,623 (370)

Mesoproterozoic surface oxygenation accompanied major sedimentary manganese deposition at 1.4 and 1.1 Ga

Geobiology, Volume 21, Issue 1, Page 28-43, January 2023., 2023
Abstract Manganese (Mn) oxidation in marine environments requires oxygen (O2) or other reactive oxygen species in the water column, and widespread Mn oxide deposition in ancient sedimentary rocks has long been used as a proxy for oxidation. The oxygenation of Earth's atmosphere and oceans across the Archean‐Proterozoic boundary are associated with ...
Sam C. Spinks, Erik A. Sperling, Robert L. Thorne, Felicity LaFountain, Alistair J. R. White, Joseph Armstrong, Martijn Woltering, Ian M. Tyler   +7 more
wiley   +1 more source

Abstracts of the Paleontological Society [PDF]

, 1938

openalex   +1 more source

Paleontology. Biostratigraphy

, 1995
Peer ...
Diéguez, Carmen, Martín-Closas, Carles, Meléndez, Nieves, Rodríguez-Lázaro, J., Trincao, Paulo   +4 more
openaire   +1 more source

Late Pleistocene–Holocene environmental fluctuations of southern Chihuahua Desert, Mexico

Journal of Quaternary Science, EarlyView.
ABSTRACT Paleoenvironmental reconstructions from the Mexican Chihuahua Desert based on biological proxies are scarce, creating a gap in our understanding of the ecological responses to climate change in this water‐scarce region. Here, we present a paleoenvironmental reconstruction based on geochemical data and biological proxies such as ostracods and ...
C. M. Chávez‐Lara, N. B. Palacios‐García, K. García‐Macedo, D. Ibarra‐Morales, M. Caballero   +4 more
wiley   +1 more source

Production of diverse brGDGTs by Acidobacterium Solibacter usitatus in response to temperature, pH, and O2 provides a culturing perspective on brGDGT proxies and biosynthesis

Geobiology, Volume 21, Issue 1, Page 102-118, January 2023., 2023
Abstract Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are bacterial membrane lipids that are frequently employed as paleoenvironmental proxies because of the strong empirical correlations between their relative abundances and environmental temperature and pH.
Toby A. Halamka, Jonathan H. Raberg, Jamie M. McFarlin, Adam D. Younkin, Christopher Mulligan, Xiao‐Lei Liu, Sebastian H. Kopf   +6 more
wiley   +1 more source

Publishing in paleontology

Acta geológica hispánica, 1981
La estructura de la publicación paleontológica depende básicamente del hecho de que la Paleontologia a) representa un tema muy amplio peroemplea relativamente pocos especialistas, b) necesita tanto representación ideográfica masiva como un aumento proporcionalde discusiónnomotética y c) estádividida entre las ciencias de la tierra y de la vida.
openaire   +2 more sources

Vertebrate Paleontology

, 2015
"Second impression March 1936." ; Bibliography: p. 451-474. ; Mode of access: Internet.
openaire   +1 more source

Preservation of stable isotopic composition in charred grains: Implications for paleoenvironmental and archeological research

Journal of Quaternary Science, EarlyView.
ABSTRACT The charring process can preserve archaeobotanical remains, providing valuable insights into past climates, agricultural practices, and plant growth conditions. However, the impact of charring on stable isotopes, especially at temperatures above 300°C, remains poorly understood.
Natálie Pernicová, Otmar Urban, Josef Čáslavský, Jana Apiar, Marek Vlach, Balázs Komoróczy, Miroslav Trnka   +6 more
wiley   +1 more source

Oxygen and carbon isotope variations in Chamelea gallina shells: Environmental influences and vital effects

Geobiology, Volume 21, Issue 1, Page 119-132, January 2023., 2023
Abstract Stable isotopes in mollusc shells, together with variable growth rates and other geochemical properties, can register different environmental clues, including seawater temperature, salinity and primary productivity. However, the strict biological control over the construction of biominerals exerted by many calcifying organisms can constrain ...
Arianna Mancuso, Ruth Yam, Fiorella Prada, Marco Stagioni, Stefano Goffredo, Aldo Shemesh   +5 more
wiley   +1 more source

GEOECOLOGICAL ANALYSIS OF STERLITAMAK SHIKHANS: IMPLICATIONS AND PROSPECTS OF ANTHROPOGENIC IMPACT ON THE COMPLEX NATURAL MONUMENTS

Вестник Кемеровского государственного университета, 2014
The paper analyzes the current geoecological state of complex natural monuments of the Republic of Bashkortostan – Sterlitamak Shikhans. Their legal status was defined, and the flora, fauna, stratigraphy and paleontology were studied on the basis of ...
I. R. Khismatullin
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