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309  Articles
1 of 32 pages  |  10  records  |  more records»
This article discusses the stages of crystallization of the Eocene trachybasalt-tra- chyandesitebasalt-phonolith formation of the Talysh zone. Determination of the composi- tion of the primary magma, evolution and melting fraction of the initial melt of t... see more

The present paper contains new results of complex studies on the geological structure, lithology, and fauna of the Middle Eocene siliceous rocks of the Ukrainian Shield Ingul megablock located in the vicinity of the villages of Tsybulevo, Verblyuzhka and ... see more

ABSTRACT. The Southern Andes Eocene-Miocene volcanism comprises a series of paleo-volcanic belts striking N-S to N10°E. Along the longitudinal depression of central-south Chile, remnants of this volcanism are distributed between about 33° and 42.5°S. Basa... see more

On the basis of the morphology of the folds, their three-dimensional position, the types of faults and the development of mud volcanism, the features of the spread of compres- sive stresses and their influence on the oil and gas bearing of the Kura and Ga... see more

The Cenozoic rocks lying in the Province of Tacna (18° S), southern Perú, represent approximately 600 m of stratigraphic thickness. This stacking groups the Sotillo (Paleocene), Moquegua Inferior (Eocene), Moquegua Superior (Oligocene), Huaylillas (Miocen... see more

We present here a reconstruction of the post late Miocene landscape evolution of the western slope of the Andean Cordillera Principal near 34°20’ S. We base our analysis on the available geological information, a morphological characterization of the land... see more

Crustal thickening by horizontal shortening and associated deformation have been broadly considered as prime mechanisms for mountain building in the Central Andes of western South America. However, timing and structural style of Andean orogeny in northern... see more

In the eastern part of the central Patagonian Cordillera (45°15-45°40S), northeast of the town of Coihaique, the chronology of volcanic sequences are documented by detailed field work and twelve new K-Ar dates that have established their Late Cretaceous-(... see more

Upper Eocene to Middle Miocene volcanic rocks are found in the Colbún area, Linares Precordillera, central Chile (35º35'-36ºS). Based on stratigraphic characteristics, K-Ar and Ar-Ar dating, two different units are recognized: 1-a Lower Unit (Upper Eocene... see more

1 of 32 pages  |  10  records  |  more records»