GEOLOGIC IMPLICATIONS OF AEROMAGNETIC DATA FOR THE EASTERN CONTINENTAL MARGIN OF THE UNITED STATES

An aeromagnetic survey extending from the Gulf of Maine to the tip of Florida was conducted by the U. S. Naval Oceanographic Office between 1964 and 1966. Flight traverses were flown in a northwesterly direction at right angles to the geologic grain. The flight lines were approximately 800 km long and had an 8‐km separation. The survey traversed part of the New England, Piedmont, and Coastal Plain provinces and extended some 320 km beyond the continental shelf into the Atlantic Ocean. Despite the wide flight‐line spacing, numerous geological and structural features became apparent from this survey. Interpretation of these features was aided by using the available gravity and seismic data in addition to the State and Provincial geologic maps. The residual aeromagnetic map shows a continuous magnetic high on or near the continental slope as far south as the 31st parallel. At about the 36th parallel, this east‐coast magnetic anomaly splits into two branches, and both of them parallel the 850‐fathom contour. ...

[1]  V. Vacquier,et al.  Calculation of the magnetization of uplifts from combining topographic and magnetic surveys , 1967 .

[2]  D. Hayes,et al.  Magnetic Boundaries in the North Atlantic Ocean , 1967, Science.

[3]  W. Melson,et al.  Magnetic Properties and Petrology of Rocks near the Crest of the Mid-Atlantic Ridge , 1967, Nature.

[4]  M. Ewing,et al.  Sediment Distribution on the Mid-Ocean Ridges with Respect to Spreading of the Sea Floor , 1967, Science.

[5]  H. W. Menard.  Transitional types of crust under small ocean basins , 1967 .

[6]  D. Strangway,et al.  Kiaman Magnetic Interval in the Western United States , 1967, Science.

[7]  E. Irving.  Paleomagnetism of some carboniferous rocks from New South Wales and its relation to geological events , 1966 .

[8]  M. Ewing,et al.  Ages of horizon a and the oldest atlantic sediments. , 1966, Science.

[9]  M. Ewing,et al.  Crustal structure of the mid‐ocean ridges: 5. Heat flow through the Atlantic Ocean floor and convection currents , 1966 .

[10]  J. Hennion,et al.  Seismic-Refraction Study of Continental Margin East of Florida , 1966 .

[11]  Xavier Le Pichon,et al.  Magnetic anomalies over the Reykjanes Ridge , 1966 .

[12]  T. H. Andel,et al.  Metamorphism in the Mid-Atlantic Ridge, 22°N latitude , 1966 .

[13]  G. B. Dalrymple,et al.  Geomagnetic Polarity Epochs. , 1964, Science.

[14]  J. Heirtzler,et al.  Magnetic Anomalies off Eastern North America , 1963 .

[15]  Arthur D Raff,et al.  MAGNETIC SURVEY OFF THE WEST COAST OF NORTH AMERICA, 40° N. LATITUDE TO 52° N. LATITUDE , 1961 .

[16]  D. Matthews.  Lavas from an Abyssal Hill on the Floor of the North Atlantic Ocean , 1961, Nature.

[17]  E. Hamilton,et al.  Ocean Basin Ages and Amounts of Original Sediments , 1960 .

[18]  E. R. King.  Regional Magnetic Map of Florida , 1959 .

[19]  F. Studt.  Magnetic survey of the Wairakei hydrothermal field , 1959 .

[20]  J. Hersey,et al.  GEOPHYSICAL INVESTIGATION OF THE CONTINENTAL MARGIN BETWEEN CAPE HENRY, VIRGINIA, AND JACKSONVILLE, FLORIDA , 1959 .

[21]  R. Frosch,et al.  THE BERMUDA-NEW ENGLAND SEAMOUNT ARC , 1956 .

[22]  Worzel Jl,et al.  GRAVITY ANOMALIES AT CONTINENTAL MARGINS. , 1955 .

[23]  L. Alldredge,et al.  Aeromagnetic surveys in the Aleutian, Marshall, and Bermuda Islands , 1954 .

[24]  R. Frosch,et al.  Seamounts in the North America Basin , 1954 .

[25]  V. Vacquier,et al.  Interpretation of Aeromagnetic Maps , 1951 .

[26]  I. Zietz,et al.  The upward continuation of anomalies in total magnetic intensity fields , 1949 .

[27]  M. Ewing,et al.  NORTH ATLANTIC HYDROGRAPHY AND THE MID-ATLANTIC RIDGE , 1949 .

[28]  R. G. Doyle,et al.  Preliminary geologic map of Maine , 1967 .

[29]  W. Geddes,et al.  Atlantic Shelf Magnetic Anomaly , 1966 .

[30]  M. Raitt,et al.  The crustal rocks , 1963 .

[31]  C. Laj,et al.  Magnetic Anomalies Over Oceanic Ridges , 1963, Nature.

[32]  G. Murray.  Geology of the Atlantic and Gulf Coastal Province of North America , 1961 .

[33]  A. Laughton.  The floors of the oceans—I , 1959 .

[34]  M. Ewing,et al.  Continental margins and geosynclines: The east coast of North America north of Cape Hatteras , 1959 .

[35]  M. N. Hill.  Recent geophysical exploration of the ocean floor , 1957 .

[36]  G. R. Maccarthy,et al.  A magnetic survey of the southern part of Georgia , 1956 .

[37]  P. L. Applin.  Preliminary report on buried pre-Mesozoic rocks in Florida and adjacent states , 1951 .

[38]  Vening Meinesz,et al.  Theory and practice of pendulum observations at sea , 1929 .