نتایج جستجو برای: event stratigraphy
تعداد نتایج: 206049 فیلتر نتایج به سال:
INTegration of Ice-core, MArine and TErrestrial records (INTIMATE) is a core project of the INQUA Palaeoclimate Commission, the primary goal of which is to synchronise records of the Last Glacial–Interglacial Transition (LGIT). Through a series of international workshops, INTIMATE has encouraged direct collaboration between scientists with interests and expertise in a wide range of palaeoenviro...
Palynomorphs are one of the few groups fossils that provide biostratigraphic control in marine to nonmarine rocks and can be applied as proxies for paleoenvironmental paleoclimatic interpretations. Their utility is enhanced by their microscopic size, which usually less than 200 micrometres; they thus easily recovered from small rock samples. They occur throughout Phanerozoic therefore invaluabl...
The analyses of dinoflagellate cyst records, from the latest Quaternary sediments recovered from DSDP Core 610A taken on the Feni Ridge in the southern Rockall Trough, and part of core MD01-2461 on the continental margin of the Porcupine Seabight in the eastern North Atlantic Ocean, has provided evidence for significant oceanographic change encompassing the Last Glacial Maximum (LGM) and part o...
A profound faunal reorganization occurred near the Paleocene/Eocene boundary, when several groups of mammals abruptly appeared on the Holarctic continents. To test the hypothesis that this event featured the dispersal of groups from Asia to North America and Europe, we used isotope stratigraphy, magnetostratigraphy, and quantitative biochronology to constrain the relative age of important Asian...
We propose a method for sketching and visualizing geological models by sequentially defining stratigraphic layers, where each layer represents a unique erosion or deposition event. Evolution of rivers and deltas is important for geologists when interpreting the stratigraphy of the subsurface, in particular for hydrocarbon exploration. We illustratively visualize mountains, basins, lakes, rivers...
may have been • mantle plume, but, alternatively, it may have been triggered by an asteroidal impact An impact fall-out layer with shocked debris has been reported at the Tr/J boundary in Italy [13]. The s ynchronicity of extrusion and extinction appear established as an event horizon independent of radiometric or fossil stratigraphy. Of course, enthusiasm for impacts does not score points in t...
A first objective is to investigate the fabric (pattern) of seabed stratification on continental margins at small time and space scales (1 cm-50 cm depth into the seabed; 1 hr-3 yrs sedimentary record). To this end, we are testing the hypothesis that on muddy shelves such as the northern California shelf, Holocene event stratigraphy consists of the deposits of high-concentration storm regimes a...
The goal of the Stratigraphy project of the STRATAFORM program is to understand the creation of the preserved stratigraphic record on continental shelves and slopes as the product of physical processes acting with spatial and temporal heterogeneities. I am using numerical models to provide insight into the formation and preservation of stratigraphic sequences at margins. My goal is to obtain a ...
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