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  • Other Sources  (2)
  • AAPG (American Association of Petroleum Geologists)
  • 2020-2020
  • 1975-1979  (1)
  • 1960-1964  (1)
  • 1945-1949
  • 1
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    Seismic Evidence for Widespread Possible Gas Hydrate Horizons on Continental Slopes and Rises (1979)
    AAPG (American Association of Petroleum Geologists)
    In:  AAPG Bulletin, 63 (12). pp. 2204-2213.
    Details
    Publication Date: 2021-12-13
    Description: Anomalous reflections in marine seismic reflection data from continental slopes are often correlated with the base of gas hydrated sedimentary rocks. Examination of University of Texas Marine Science Institute reflection data reveals the possible presence of such gas hydrates along the east coast of the United States, the western Gulf of Mexico, the coasts of northern Colombia and northern Panama, and along the Pacific side of Central America in areas extending from Panama to near Acapulco, Mexico. Suspected hydrates are present in water depths of 700 to 4,400 m and extend from 100 to 1,100 m subbottom. Geometric relations, reflection coefficients, reflection polarity, and pressure-temperature relations all support the identification of the anomalous reflections as the base of gas hydrated sediments. In most places, gas hydrate association is related to structural anomalies (anticlines, dipping strata), which may allow gas to concentrate and migrate updip into pressure and temperature conditions suitable for hydrate formation. The gas hydrate boundary can be used to estimate thermal gradients. In general, thermal gradients estimated from the gas hydrate phase boundary are higher than reported thermal gradients measured by conventional means.
    Type: Article , PeerReviewed
    Format: text
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  • 2
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    Classification of carbonate rocks according to depositional textures (1962)
    AAPG (American Association of Petroleum Geologists)
    In:  In: Classification of Carbonate Rocks — A Symposium. , ed. by Ham , W. E. AAPG Memoir, 1 . AAPG (American Association of Petroleum Geologists), Tulsa, Oklahoma, pp. 108-121. ISBN 9781629812366
    Details
    Publication Date: 2021-01-27
    Description: Three textural features seem especially useful in classifying those carbonate rocks that retain their depositional texture (1) Presence or absence of carbonate mud, which differentiates muddy carbonate from grainstone; (2) abundance of grains, which allows muddy carbonates to be subdivided into mudstone, wackestone, and packstone; and (3) presence of signs of binding during deposition, which characterizes boundstone. The distinction between grain-support and mud-support differentiates packstone from wackestone—packstone is full of its particular mixture of grains, wackestone is not. Rocks retaining too little of their depositional texture to be classified are set aside as crystalline carbonates.
    Type: Book chapter , NonPeerReviewed
    Format: text
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