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The following articles from publications of The Geological Society of America are assembled m chronological order by publication daté and provide perspective of the development of geological knowledge of the . Mid-Atlantic Ridgte spanning a quarter century of research from early Studies to the present frontier.

Early bathymetric reconnaissance gradually/revealed the regjrmal morphology of the Mid-Atlantic Ridge (Tolstoy and Ewing, 1949; Tolstoy, .1951). Cross-sections of the deep crustal structure underlying the Mid-Atlantic Ridge determined by the two-ship seismic refraction method (Ewing and Ewing, 1959) are only now being refined by new methods. Groundwork on the regional distribution of sediment type by coring (Encson and others. 1961) and of sediment thickness by seismic refléttion profiling (Ewing and others. 1964) preceded studies of sedimentary processes at representative sites on the Mid-Atlantic Ridge (van Andel and Komar. 1969; Ruddiman. 1972). Sampling of rocks from emerged (Le Maitre. 1962) and from submerged (Quon and Ehlers. 1963; Engel and others. 1965; Switzer and others. 1970; Mélson and Thompson. 1973) portions of the Mid-Atlantic Ridge has contributed to recognition of the distinctive petrology of oceanic rocks, and has stimulated their comparison with ophiolites (Thayer, 1969; Green, 1970).

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