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991.
992.
Nicolas Waldmann Flavio S. Anselmetti Daniel Ariztegui James A. Austin Jr Mortaza Pirouz Christopher M. Moy Robert Dunbar 《Basin Research》2011,23(2):171-190
High‐resolution seismic imaging and coring in Lago Fagnano, located along a plate boundary in Tierra del Fuego, have revealed a dated sequence of Holocene mass‐wasting events. These structures are interpreted as sediment mobilizations resulting from loading of the slope‐adjacent lake floor during mass‐flow deposition. More than 19 mass‐flow deposits have been identified, combining results from 800 km of gridded seismic profiles used to site sediment cores. Successions of up to 6‐m thick mass‐flow deposits, pond atop the basin floor and spread eastward and westward following the main axis of the eastern sub‐basin of Lago Fagnano. We developed an age model, on the basis of information from previous studies and from new AMS‐14C ages on cored sediments, which allows us to establish a well‐constrained chronologic mass‐wasting event‐catalogue covering the last ~12 000 years. Simultaneously triggered, basin‐wide lateral slope failure and the formation of multiple debris flow and postulated megaturbidite deposits are interpreted as the fingerprint of paleo‐seismic activity along the Magallanes‐Fagnano transform fault that runs along the entire lake basin. The slope failures and megaturbidites are interpreted as recording large earthquakes occurring along the transform fault since the early Holocene. The results from this study provide new data about the frequency and possible magnitude of Holocene earthquakes in Tierra del Fuego, which can be applied in the context of seismic hazard assessment in southernmost Patagonia. 相似文献
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Robert H Wood 《Geochimica et cosmochimica acta》2002,66(24):4365
998.
Ohne Zusammenfassung 相似文献
999.
Guinevere Kauffmann Timothy M. Heckman Simon D. M. White Stéphane Charlot Christy Tremonti Jarle Brinchmann Gustavo Bruzual Eric W. Peng Mark Seibert Mariangela Bernardi Michael Blanton Jon Brinkmann Francisco Castander Istvan Csábai Masataka Fukugita Zeljko Ivezic Jeffrey A. Munn Robert C. Nichol Nikhil Padmanabhan Aniruddha R. Thakar David H. Weinberg Donald York 《Monthly notices of the Royal Astronomical Society》2003,341(1):33-53
1000.
Robert Stein Dali Georgobiani Regner Trampedach Hans-Günter Ludwig Åke Nordlund 《Solar physics》2004,220(2):229-242
P-mode oscillations in the Sun and stars are excited stochastically by Reynolds stress and entropy fluctuations produced by
convection in their outer envelopes. The excitation rate of radial oscillations of stars near the main sequence from K to
F and a subgiant K IV star have been calculated from numerical simulations of their surface convection zones. P-mode excitation
increases with increasing effective temperature (until envelope convection ceases in the F stars) and also increases with
decreasing gravity. The frequency of the maximum excitation decreases with decreasing surface gravity. 相似文献