نتایج جستجو برای: seismic stratigraphy
تعداد نتایج: 40487 فیلتر نتایج به سال:
We compare high-resolution pollen and chironomid records from the last 15,000 yr in Laguna Facil, southern Chile. Major vegetation and chironomid changes are recorded between ca 14,900 and 14,700 cal. yr BP. During the Lateglacial, changes in the chironomid stratigraphy lag behind changes in the pollen stratigraphy suggesting that the chironomids are responding to changes in the tree canopy or ...
This study focuses on the sequence stratigraphy and dominated seismic facies in Central Taranaki basin. Four regional sequences namely SEQ4 to SEQ1 from bottom top four boundaries representing unconformities H4 H1 have been traced based reflection terminations. was validated using well logs information. An onlapping feature section indicates a new perspective surface separated between upper low...
The stratigraphy of the South-Pole Aitken basin (SPA) interior is consistent with that of a massive impact melt sheet that differentiated to form cumulates. Spectroscopic and geophysical constraints on the stratigraphy of SPA suggest a 12.5 km thick layer of norite above ultramafic pyroxenite and dunite layers. A similar stratigraphy is produced from differentiation by crystal settling of a 50 ...
Introduction: The Jezero impact crater hosted an open-basin lake [1] that was active during the valley network forming era on early Mars [2]. This basin contains a well exposed delta deposit at the mouth of the western inlet valley (Fig. 1) [1,3-5]. The fluvial stratigraphy of this deposit provides a record of the channels that built the delta over time. Here we describe observations of the str...
The Congo basin (CB) occupies a large part of the craton, which derived from amalgamation different cratonic pieces. As intracratonic basin, it initiated, possibly as failed rift, in late Mesoproterozoic and evolved during Neoproterozoic Phanerozoic an intraplate setting. For this reason, CB can be considered natural laboratory for investigating processes that govern long–term evolution contine...
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