Results 51 to 60 of about 1,054 (150)

DEEP STRUCTURE, TECTONICS, EVOLUTION AND HYDROCARBON POTENTIAL OF THE NORTH-WESTERN SHELF OF THE BLACK SEA ALONG 31°20’ E

open access: yesГеологія і корисні копалини Світового океану, 2021
A density modeling of the north-western shelf of the Black Sea along 31°20’ E was carried out. According to its results, a complex block structure of the area is determined, which is closely connected with the history of its development.
Kozlenko M.V.
doaj   +1 more source

Columnar stromatolites from the Early Proterozoic Schmidtsdrift Formation, Northern Cape province, South Africa - Part I: systematic and diagnostic features [PDF]

open access: yes, 1977
Main articleThe Schmidtsdrift Formation (Transvaal Dolomite) is a Lower Proterozoic stromatolite-bearing carbonate unit. A good succession of columnar stromatolites occurs along the Boetsap River (Northern Cape Province).
Bertrand-Sarfati, J.
core  

The Timan-Pechora basin. The structure and main stages of development

open access: yesGeoresursy, 2017
The lack of complete inheritance in the history of the Timan-Pechora basin development has led to a discrepancy between the basement surface plans and the individual sub-levels and their complexes. In the lower part of the section, the structures inherit
A.V. Stoupakova
doaj   +1 more source

The significance and provenance of stromatolitic clasts in a probable Late Precambrian diamictite in north-western Tasmania [PDF]

open access: yes, 1976
Two types of stromatolitic dolomite boulders occur in a diamictite of possibly late Precambrian age in northwestern Tasmania; they are the oldest Tasmanian fossils so far recorded.
Griffin, BJ, Preiss, WW
core   +2 more sources

BOUNDARY BETWEEN THE TIMANIAN AND URALIAN TECTONIC CYCLES: RESULTS OF DATING OF DETRITAL ZIRCONS FROM BASAL HORIZONS OF THE LOWER PALEOZOIC SYNRIFT COMPLEX OF THE POLAR URALS, AND IGNEOUS ROCK AGE DATA REPORT

open access: yesГеодинамика и тектонофизика
The Upper Cambrian-Lower Ordovician terrigenous strata, unconformably overlying the Upper Riphean-Vendian rocks of the Timanide orogen in the north of the Urals, and contemporaneous bimodal volcanics and intrusive rocks are considered complexes marking ...
A. A. Soboleva   +2 more
doaj   +1 more source

Microfossils from the late Mesoproterozoic - early Neoproterozoic Atar/EI Mreiti Group, Taoudeni Basin, Mauritania, northwestern Africa [PDF]

open access: yes, 2017
The well-preserved Meso-Neoproterozoic shallow marine succession of the Atar/EI Mreiti Group, in the Taoudeni Basin, Mauritania, offers a unique opportunity to investigate the mid-Proterozoic eukaryotic record in Western Africa.
Beghin, J.   +6 more
core  

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  

Рудная минерализация габброидов Аргысукского массива (северо-запад Восточного Саяна) [PDF]

open access: yes, 2016
Актуальность работы обусловлена необходимостью детального петрологического исследования многочисленных потенциально рудоносных мафит-ультрамафитовых массивов Канской глыбы Восточного Саяна с целью совершенствования региональных схем корреляции, а также ...
Юричев, Алексей Николаевич
core  

Late Precambrian U-Pb titanite age for peak regional metamorphism and deformation (Knoydartian orogeny) in the western Moine, Scotland [PDF]

open access: yes, 2003
There has been controversy over the number and timing of orogenies in the Precambrian Moine block in the Scottish Caledonides since the earliest radiometric dating in the 1960s. This work challenges a recent hypothesis, that this sector of the Laurentian
Evans, J.A., Tanner, P.W.G.
core   +1 more source

Carbonate sedimentation through the late Precambrian and Phanerozoic [PDF]

open access: yes, 1999
The global sediment mass-age distribution indicates large variations in the rates of carbonate sedimentation through time. The largest mass of carbonate deposited during the entire history of the earth was produced during the Cambrian, possibly ...
Hay, William W.
core  

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