Results 111 to 120 of about 12,911 (237)
, 2017 First International Field Workshop and Seminar on Proterozoic-Cambrian Phosphorites, held in Australia, August ...
International Field Workshop and Seminar on Proterozoic-Cambrian Phosphorites +1 more
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Caledonian upgrading of Proterozoic low-grade base-metal deposits in northern Sweden
, 1994 Proterozoic sulfide deposits within the basement of northern Sweden have lead isotopic compositions that fall on a mixing line in the206Pb/204Pb-207Pb/204Pb diagram.
Romer, Rolf L.,
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A tale of two microbialites: Stromatolites and microbially induced sedimentary structures
Sedimentology, Volume 73, Issue 4, Page 849-863, June 2026.ABSTRACT Microbialites are biosedimentary structures built by microbial mats. Five microbialite groups are distinguished: stromatolites, thrombolites, dendrolites, leiloites and microbially induced sedimentary structures (MISS). This contribution discusses the two most abundant microbialite groups in marine settings, stromatolites and MISS.
Nora Noffke, Stanley M. Awramik
wiley +1 more source
Sedimentology, Volume 73, Issue 4, Page 914-944, June 2026.ABSTRACT Gas domes serve as some of the earliest and most persisting indicators of life on Earth, yet their documentation in continental environments remains sparse. This study aims to bridge this gap by examining gas domes within the Permian fluvial succession of Monte Luco, located in the caldera of the Bolzano Supervolcano. These structures occur as
Andrea Baucon +5 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.Abstract Dense sedimentary iron formations (IFs) subducted into the mantle during Earth's early history, may have descended to the core‐mantle boundary where they could exert strong control on its thermal and seismological properties. A key unanswered question is the extent to which IFs retain their oxidized character in the much more reducing mantle ...
Jemila A. Edmond +2 more
wiley +1 more source
Proterozoic Basins of Peninsular India: Status within the Global Proterozoic Systems
Proceedings of the Indian National Science Academy, 2016 This compilation is intended to present a snap-shot of the current status of the knowledge on the Proterozoic sediments and tectonic events that are preserved in Peninsular India; on the backdrop of the growing understanding of global events and environmental evolution during that period.
openaire +1 more source
Transcontinental Proterozoic provinces
, 1993 Research on the Precambrian basement of North America over the past two decades has shown that Archean and earliest Proterozoic evolution culminated in suturing of Archean cratonic elements and pre-1.80-Ga Proterozoic terranes to form the Canadian Shield
Karlstrom, Karl E. +22 more
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Proterozoic Ocean Chemistry and Evolution: A Bioinorganic Bridge?
, 2002 Recent data imply that for much of the Proterozoic Eon (2500 to 543 million years ago), Earth's oceans were moderately oxic at the surface and sulfidic at depth.
Knoll, Andrew, Anbar, Ariel D.
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Proterozoic Geology of the Bradshaw Mountains and environs, Central Arizona
, 2017 Phil Anderson's maps of the Proterozoic of the Bradshaw Mountains of central Arizona's Transition Zone with a forward and note of explanation by Steve Reynolds and others.
Anderson, P.
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Proterozoic photosynthesis - a critical review
Chlorophyll-based photosynthesis has fuelled the biosphere since at least the early Archean, but it was the ecological takeover of oxygenic cyanobacteria in the early Palaeoproterozoic, and of photosynthetic eukaryotes in the late Neoproterozoic, that ...
Butterfield, Nicholas J.
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