Results 111 to 120 of about 6,689 (261)

Strontium isotopic composition from Northeast Patagonia: Preliminary results [PDF]

open access: yes, 2014
Se estudió la composición isotópica de estroncio de rocas calcáreas de unidades del Noreste patagónico. Incluye, a) mármoles de Pailemán (de dudosa pertenencia a la Formación El Jagüelito), valor medio de 87Sr/86Sr 0,707354 ± 0,000113; b) mármoles de ...
Gonzalez, Pablo Diego   +6 more
core   +2 more sources

Subsidence history of the Ediacaran Johnnie Formation and related strata of southwest Laurentia: Implications for the age and duration of the Shuram isotopic excursion and animal evolution [PDF]

open access: yes, 2018
The Johnnie Formation and associated Ediacaran strata in southwest Laurentia are ~3000 m thick, with a Marinoan cap carbonate sequence at the bottom, and a transition from Ediacaran to Cambrian fauna at the top.
Wernicke, Brian P., Witkosky, Rebecca
core   +1 more source

Application of elemental chemostratigraphy to refine the stratigraphy of the Adavale Basin, Queensland [PDF]

open access: hybrid, 2023
David Riley   +5 more
openalex   +1 more source

A Stratified Redox Model for the Ediacaran Ocean [PDF]

open access: yes, 2010
The Ediacaran Period (635 to 542 million years ago) was a time of fundamental environmental and evolutionary change, culminating in the first appearance of macroscopic animals.
Chu, Xuelei   +5 more
core   +1 more source

Micropaleontology and chemostratigraphy of the Neoproterozoic Mbuji-Mayi Supergroup, Democratic Republic of Congo. [PDF]

open access: yes, 2014
peer ...
Asael, Dan   +5 more
core  

Chemostratigraphy in southern Ontario by pXRF spectrometry

open access: yes, 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

Integrated chronostratigraphy of Proterozoic-Cambrian boundary beds in the western Anabar region, northern Siberia [PDF]

open access: yes, 1996
Carbonate-rich sedimentary rocks of the western Anabar region, northern Siberia, preserve an exceptional record of evolutionary and biogeochemical events near the Proterozoic/Cambrian boundary. Sedimentologically, the boundary succession can be divided
Adams, William   +5 more
core  

Biological diversification linked to environmental stabilization following the Sturtian Snowball glaciation. [PDF]

open access: yesSci Adv, 2023
Bowyer FT   +14 more
europepmc   +1 more source

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