Results 111 to 120 of about 41,082 (236)

New Phylogenies of the Lower Organisms: Possible Relation to Organic Deposits in Precambrian Sediment

The Journal of Geology, 1969
Classical phylogenies of the lower organisms are based on assumptions recently claimed to be erroneous. Alternative assumptions, more consistent with modern genetic and biochemical data, lead to the construction of new phylogenies. The new phylogenies (one for prokaryote organisms and one for eukaryotes) based on the symbiotic theory of the origin of ...
openaire   +2 more sources

Some illustrations of the advantages of improved resolution in geologic studies [PDF]

There are no author-identified significant results in this ...
Houston, R. S., Marrs, R. W., Tomes, B. J.   +2 more
core   +1 more source

Reduced Injection Rates and Shallower Depths Mitigated Induced Seismicity in Oklahoma

The Seismic Record
The proximity of wastewater disposal to the Precambrian basement is a critical factor influencing induced earthquake rates in the Central United States, but the impact of reducing injection depths has not been widely demonstrated.
Robert J. Skoumal, Andrew J. Barbour, Justin L. Rubinstein, Margaret E. Glasgow   +3 more
doaj   +1 more source

Structural geology of the African rift system: Summary of new data from ERTS-1 imagery [PDF]

ERTS imagery reveals for the first time the structural pattern of the African rift system as a whole. The strong influence of Precambrian structures on this pattern is clearly evident, especially along zones of cataclastic deformation, but the rift ...
Mohr, P. A.
core   +1 more source

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

An archean suture zone in the Tobacco Root Mountains? (1984) Evolution of Archean Continental Crust, SW Montana (1985) [PDF]

The Lake Plateau area of the Beartooth Mountains, Montana were mapped and geochemically sampled. The allochthonous nature of the Stillwater Complex was interpreted as a Cordilleran-style continental margin.
Kain, L., Mogk, D. W.
core   +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  

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

Cyclic growth in Atlantic region continental crust [PDF]

Atlantic region continental crust evolved in successive stages under the influence of regular, approximately 400 Ma-long tectonic cycles. Data point to a variety of operative tectonic processes ranging from widespread ocean floor consumption (Wilson ...
Goodwin, A. M.
core   +1 more source

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

, 1976
openaire   +1 more source