Abstract
THE dredging of schists, phyllites and marbles from the faulted margin of a tilted crystal block in the central Tyrrhenian Sea shows that the acoustical basement beneath the centre of this sea basin includes a sequence of rocks similar or perhaps identical to the Palaeozoic and Triassic schists and phyllites of the adjacent Apennine, Calabrian and Sicilian chains, the Pontian Islands1 and Sardinia. Even the low to medium grade metamorphism observed must have occurred beneath the Earth's surface and following metamorphism and deformation we infer that these rocks were uplifted, denuded by subaerial erosion and finally foundered more than 3,000 m below sea level. The Neogene subsidence is still continuing. The metamorphic rocks obtained from the Tyrrhenian acoustic basement appear to support the former existence of the Tyrrhenides and indicate that this ancient upland was underlain by continental crust.
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References
Segre, A. G., Memorie Soc. Tosc. Sci. Nat., 75, 231 (1968).
Segre, A. G., Accad. Naz., 40, 76–77 (1953–54).
Ferrara, G., Segre, A. G., and Tongiorgi, E., Memorie Atti. Soc. Tosc. Sci. Nat. A., 69 (1962).
Ferrara, G., and Longinelli, A., Bull. Soc. Geol. Ital., 80 (1961).
Borsi, S., Ferrara, G., Rau, A., and Tongiorgi, M., Memorie Atti. Soc. Tosc. Sci. Nat. A., 63 (1955).
Symposium on Oceanization of the Western Mediterranean, 26 (Royal Netherlands Geol. Min. Soc., 1969).
Ewing, M., and Ewing, J., Bull. Geol. Soc. Amer., 70, 303 (1959).
Fahlquist, D. A., and Hersey, J. B., Bull. Inst. Ocean. Monaco (in the press).
Maskaleo, V. N., Proc. Acad. Sci. USSR Geol. Ser., 6, 49 (1967).
Vogt, P. R., and Higgs, R. H., Earth Planet. Sci. Lett., 65, 439 (1969).
Carey, S. W., in A Symposium on Continental Drift (Univ. of Tasmania, 1958).
Argand, E., Congr. Geol. Intern., 13, CR., 357 (1922).
Segre, A. G., and Stocchino, C., Inst. Idrog. d. Marina, Pub., F.E., 1037 (1969).
Segre, A. G., Geol. Rdsch., 47, 195 (1958).
Maccarrone, E., Boll. Soc. Geol. Ital., 89, 159 (1970).
Ryan, W. B. F., Workum, F., and Hersey, J. B., Bull. Geol. Soc. Amer., 76, 1261 (1965).
Hersey, J. B., in Submarine Geology and Geophysics, 75 (Butterworths, 1965).
Ryan, W. B. F., thesis, Columbia University (1970).
Heezen, B. C., and Sheridan, R., Science, 154, 1644 (1966).
Fischer, A. G., Heezen, B. C., Boyce, R. E., Bukry, D., Douglas, R. G., Garrison, R. E., Kling, S. A., Krasheninnikov, V., Lisitzin, A. P., and Pimm, A. C., Science, 168, 1210 (1970).
Fox, P. F., Ruddiman, W. F., Ryan, W. B. F., and Heezen, B. C., Tectonophys. (in the press).
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HEEZEN, B., GRAY, C., SEGRE, A. et al. Evidence of Foundered Continental Crust beneath the Central Tyrrhenian Sea. Nature 229, 327–329 (1971). https://doi.org/10.1038/229327a0
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DOI: https://doi.org/10.1038/229327a0
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