Results 81 to 90 of about 1,851 (210)

Carbon isotope fluctuations in Precambrian carbonate sequences of several localities in Brazil

Anais da Academia Brasileira de Ciências, 2000
Carbon isotope fluctuations in Precambrian sedimentary carbonates between 2.8 Ga and 0.60 Ga in Brazil are examined in this study. The carbonate facies of the BIF of the 2.8 Ga-old Carajás Formation, state of Pará in northern Brazil, has rather ...
SIAL ALCIDES N., FERREIRA VALDEREZ P., DEALMEIDA AFONSO R., ROMANO ANTONIO W., PARENTE CLOVIS V., DACOSTA MARCONDES L., SANTOS VICTOR H.   +6 more
doaj  

Cambrian explosion condensed: High-precision geochronology of the lower Wood Canyon Formation, Nevada. [PDF]

Proc Natl Acad Sci U S A, 2023
Nelson LL, Crowley JL, Smith EF, Schwartz DM, Hodgin EB, Schmitz MD.   +5 more
europepmc   +1 more source

Chemostratigraphy in southern Ontario by pXRF spectrometry

, 2017
For groundwater studies, the collection of sediment geochemistry is often beyond the scope, and budget of many programs, and is generally not included as part of routine data collection. Portable x-ray fluorescence spectrometer (pXRF) has proven to be a successful tool to characterize the chemostratigraphy of glacial derived materials collected from ...
R Knight, H A J Russell, F Bajc
openaire   +1 more source

Chemostratigraphy, petrography, and SEM investigations of the Lower Triassic Montney Formation in Alberta: implications for a new and revised diagenetic and depositional model

, 2018
High resolution chemostratigraphy of the Montney Formation across Alberta identifies three unique and distinct chemostratigraphic units, referred to as CS1-3, with several subunits (i.e. CS1a, lb, 3a, 3b).
Tu, Sam, Tucker, Jason, Bozarth, Troy, Cui, Albert, Nassichuk, Brent, Wust, Raphael A.J.   +5 more
core  

Chemostratigraphy of the Lower Cretaceous Basal Quartz in Southern Alberta

, 2002
The Lower Cretaceous Basal Quartz (BQ) of the Western Canadian Sedimentary Basin (WCSB) is the basal part of the Lower Mannville Formation, which, together with the overlying Upper Mannville, is considered one of the most prolific hydrocarbon- bearing ...
K.T. Radcliffe, A.M. Wright, B.A. Zaitlin, D.S. Wray   +3 more
core   +1 more source

Chemostratigraphy of Jurassic-cretaceous Italian carbonate platforms

, 2002
Samples of shallow-water carbonates were collected from Jurassic and Cretaceous Italian carbonate platforms and subjected to petrographic, diagenetic and chemostratigraphic analyses (87Sr/86Sr, δ13Ccarb, δ13Corg, δ18O). In general, the new chemostratigraphic data generated reflect trends established by previous work, some of which has been carried out ...
Woodfine, R, Woodfine, Richard Gareth
openaire   +1 more source

Katian (Upper Ordovician) carbon isotope chemostratigraphy in the Neixiang area, central China:Implications for intercontinental correlation

, 2019
The Katian (Upper Ordovician) Shiyanhe Formation at the Sigang section, Neixiang area, Henan Province, central China, has been investigated for carbon isotope (? 13 C carb ) chemostratigraphy.
Jing, Xiuchun, Tian, Yufeng, Stouge, Svend, Wang, Xunlian, Zhou, Hongrui   +4 more
core   +1 more source

Facies analysis, sequence stratigraphy and chemostratigraphy of the Sete Lagoas Formation (Bambui Group), northern Minas Gerais State, Brazil: evidence of a cap carbonate deposited on the Januária basement high

Brazilian Journal of Geology
: Sedimentary rocks of the Sete Lagoas Formation, exposed in the left margin of the São Francisco river (Minas Gerais State, Brazil), were deposited on the Januária-Itacarambi basement high.
Pascoal Perrella Júnior, Alexandre Uhlein, Gabriel Jube Uhlein, Alcides Nobrega Sial, Antônio Carlos Pedrosa-Soares, Otávio Nunes Borges de Lima   +5 more
doaj   +1 more source

A Multiple-Proxy Geochemical Investigation of a Shallow Core from Doggerland: Implications for Palaeolandscape and Paleoenvironmental Reconstruction

Humans
The exploration of Doggerland, the prehistoric landscape that once connected Britain to the continent, remains one of Europe’s most significant archeological challenges.
Mohammed Bensharada, Alex Finlay, Ben Stern, Richard Telford, Vincent Gaffney   +4 more
doaj   +1 more source

Quantitative and Nuanced Approaches Elucidate Carbon Isotope Records

Geochemistry, Geophysics, Geosystems
Earth scientists have leveraged carbon isotope records to interpret Earth history and establish chronostratigraphic frameworks for decades (e.g., Halverson et al., 2005, https://doi.org/10.1130/b25630.1; Kaufman & Knoll, 1995, https://doi.org/10.1016 ...
Cedric J. Hagen
doaj   +1 more source