نتایج جستجو برای: sedimentary basin
تعداد نتایج: 65194 فیلتر نتایج به سال:
a micropaleontological study has been carried out on the samples collected from the sarv abad section, the oldest and only known jurassic sedimentary rocks cropping out in the moghan area. studied sequence consists of carbonates bounded at both base and top by clastic deposits. studied carbonate deposits provide an assemblage of benthic foraminifera as well as calcareous algae. the stratigraphi...
It has been previously proposed that alkalinity release from sediments can play an important role in the carbonate dynamics on continental shelves, lowering the pCO2 of seawater and hence increasing the CO2 uptake from the atmosphere. To test this hypothesis, sedimentary alkalinity generation was quantified within cohesive and permeable sediments across the North Sea during two cruises in Septe...
Elemental (C, N, Pb) and isotopic (dC, dN) measurements of cored sediment from a small bog in northern New Mexico reveal changes in climate during the Late Pleistocene and Holocene. Abrupt increases in Pb concentration and dC values ca. 14 420 cal. YBP indicate significant runoff to the shallow lake that existed at that time. Weathering and transport of local volcanic rocks resulted in the deli...
binaloud mountains formed during collision of iran and turan plate in the late triassic time and caused shortening of the sedimentary cover because of cimmerian and alpine orogeny. the thrust sheets with different generations formed as a results of the binalood and alborz fold- thrust belts. northeast of iran that was already south coast of the divergent margin of the paleothetys ocean at this ...
-The Mesozoic to Eocene sedimentary succession of Hazara Basin dominated by carbonates is characterized by a distinct package of sediments punctuated by a number of diastems, hiatus and unconformities. The Hazara Basin evolved in Hettangian with the development of lagoonal to upper shoreface conditions on the northern margin of northward flying India. It was followed by a thick pile of middle J...
The Mars Science Laboratory rover Curiosity visited two active wind-blown sand dunes within Gale crater, Mars, which provided the first ground-based opportunity to compare Martian and terrestrial eolian dune sedimentary processes and study a modern analog for the Martian eolian rock record. Orbital and rover images of these dunes reveal terrestrial-like and uniquely Martian processes. The prese...
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