Fisiologia de mamiferos

An Ossified Meckel's Cartilage in Two Cretaceous Mammals and Origin of the Mammalian Middle Ear Yuanqing Wang, et al. Science 294, 357 (2001); DOI: 10.1126/science.1063830
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13. P. R. Cummins, B. L. N. Kennet, J. R. Bowman, M. G. Bostock, Bull. Seismol. Soc. Am. 82, 323 (1992). 14. H. M. Benz, J. E. Vidale, Nature 365, 147 (1993). 15. Weincluded 1530 events with a depth from 0 to 75 7.0, and from km, a magnitude of 6.0 Mw stations in the epicentral distance range 100° 160° for the period 1 January 1980 to 29 March 1998. The SS phases in the individual traces are hand-picked, and the data is deconvolved for receiver effects and bandpass-filtered between 15 and 75 s. 16. The size of the caps corresponds to the Fresnel zone of the SSrays. Neighboring caps overlap partly to ensure smoothing. 17. B. Efron, R. Tibshirani, Science 253, 390 (1991). The data set was also divided into two subsets with epicentral distances from 100° to 130° and 130° to 160°; splitting was still present in stacks of the subsets. 18. Supplementary material is available at www. sciencemag.org/cgi/content/full/294/5541/354/DC1 19. The stacks arecross-correlated with the SS pulse; splitting is determined by two cross-correlation maxima (instead of one) in the depth range of 480 to 600 km. 20. We find single reflections from 520 km for stacks corresponding to different regional types (shields, tectonically active regions, stable continents, and oceans). The stacks exhibit somewhat different amplitudes and, in particular, the shield stack shows asmaller amplitude, confirming an earlier study (6). N. A. Simmons, H. Gurrola, Nature 405, 559 (2000). D. Canil, Phys. Earth Planet. Inter. 86, 25 (1994). S. Koito, M. Akaogi, O. Kubuta, T. Suzuki, Phys. Earth Planet. Inter. 120, 1 (2000). D. J. Weidner, Y. Wang, in Earth’s Deep Interior: Mineral Physics and Tomography from the Atomic to the Global Scale (Geophysical Monograph 117, AmericanGeophysical Union, Washington, DC, 2000), pp. 215–235. J. Ritsema, H. J. van Heijst, J. H. Woodhouse, Science 286, 1925 (1999). Y. Fei, C. Bertka, in Mantle Petrology: Field Observations and High-Pressure Experimentation, Special Publication in honor of Francis R. Boyd, Geochem. Soc. Spec. Pub. (Geochemical Society, Washington University, St. Louis, MO, 1999), vol. 6, pp. 189 –207. T. Inoue, D. J....