Results 131 to 140 of about 5,193 (249)

Ostracods from the Nimar Sandstone Formation, Bagh Group (Upper Cretaceous) of Pipaldehla, Jhabua District, Madhya Pradesh, India: Paleobiogeography and age

Journal of the Palaeontological Society of India
The palaeobiogeography and age of the upper calcareous part of the Nimar Sandstone (NS), Bagh Group is determined based on ostracod fossils. The rocks of the NS directly rest over the Precambrian basement rocks outcropping near Pipaldehla, Gola Chhoti ...
Madan L. Nagori, Maya Chaudhary, Mahesh Kalal   +2 more
doaj   +1 more source

Distal Marine Mercury Signals in Peak Late Paleozoic Ice Age: Implications for Aeolian Versus Volcanic Inputs

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract An investigation of the relationships among large igneous province (LIP), carbon cycling, and climate change is central to understanding Earth system. During Glacial III, the most intense phase of Late Paleozoic Ice Age, the influence of coeval LIP on the carbon cycle and climate remains debated.
Yuzhu Ge, J. E. Sonke, L. Laffont, T. R. Them II, A. Bekker, Huaguo Wen   +5 more
wiley   +1 more source

Assessment of the contribution of Precambrian deposits in forming the petroleum potential of the eastern part of the Volga-Urals basin using results of modeling

Записки Горного института
Consideration is given to results of geochemical analysis of organic matter and oils of the Proterozoic (the RF-V complex) and the Paleozoic (the pay intervals D2, D3, C1-2) of the eastern part of the Volga-Urals petroleum basin.
Dmitrii D. Kozhanov, Mariya Bolshakova
doaj  

An overview of Precambrian rocks in Sonora [PDF]

, 1981
The oldest stratified rocks recognized in NW Sonora (and in Mexico) are deformed muscovite-quartz schists, quartzites, and biotite-quartzofeldspathic gneisses near Caborca, which are cut by calcalkaline intrusives ranging from 1,710 to 1,750 m.y. in age.
Anderson, Thomas H., Silver, Leon T.
core  

Crustal Responses to the Destruction of Continental Lithosphere: Insights From Radial Anisotropy of the Tanlu Fault Zone, Eastern China

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Since the Mesozoic, much of the eastern China lithosphere was removed through thermo‐mechanical erosion and delamination, yet the effects on the overlying crust remain unclear. The Tanlu Fault Zone (TLFZ), the region's largest lithosphere‐scale weakness, offers a natural laboratory to assess crustal responses to lithospheric destruction.
Yuqi Zhu, Zhouchuan Huang, Frederik Tilmann, Kuan‐Yu Ke, Xinglu Wang, Cong Ji   +5 more
wiley   +1 more source

Molybdenum isotope fractionations between ferromanganese oxides and seawater influenced ancient sedimentary isotopic signatures

Communications Earth & Environment
The use of molybdenum isotopes (δ98Mo) as a paleo-redox proxy requires quantifications of fluxes and isotopic fractionations in each molybdenum sink.
Mengchun Cao, Guang-Yi Wei, Feifei Zhang, Xiangwen Ren, Xuefa Shi, Yi-Bo Lin, Tao Li, Sihui Chen, Hong-Fei Ling, Jian Cao   +9 more
doaj   +1 more source

The geological evolution of the eastern Richtersveld

, 1978
Includes bibliographical references.The lithology of the early Proterozoic (-1950-1750 my) Richtersveld is characterised by predominantly calc-alkaline volcanics, (De Hoop Subgroup) overlain by and intercalated with quartzitic metasediments into which ...
Ritter, Ulrich
core  

Seismic Imaging Reveals Ongoing Modification of Craton Margins in Northeast Asia

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Cratonic margins are commonly modified, yet the processes responsible remain debated. The Korean Peninsula, situated between adjacent cratons, the Japan Trench, and a back‐arc system, provides a natural setting to investigate this problem. Using 4 years of dense seismic observations, we image upper‐mantle structure beneath the peninsula with P‐
Hwaju Lee, YoungHee Kim, Maximiliano J. Bezada, Hyunwoo Lee   +3 more
wiley   +1 more source

Lower and Middle Precambrian Geology of the Denham Area, Northern Pine County, East-Central Minnesota

, 1985
A Thesis submitted to the faculty of the Graduate School of the University of Minnesota by Scott Nelson Neumann in partial fulfillment of the requirements for the degree of Master of Science, May 1985.
Neumann, Scott Nelson
core  

Geology of the Precambrian W (lower Precambrian) rocks in western Gogebic County, Michigan [PDF]

, 1976
openaire   +1 more source