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Additional resources for Antarctica As an Exploration Frontier - Hydrocarbon Potential, Geology, and Hazards (AAPG Studies in Geology 31)

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Typically, ice gouge features are most common and best developed on the sides of troughs, subdued on bank tops and absent in deep troughs. Studies show that by tilting or overturning, icebergs can increase their draft by as much as 50% (Keys, 1 983) and that the majority of Antarctic icebergs are nontabular or tilted (Keys, 1984) (Figure 16). The b athymet ry of areas w here icebergs are frequently grounded also provides information on the draft of Antarctic Hazards to Antarctic Exploration and Production icebergs.

Interpretation of magnetic anomalies as possible indi­ cators of a sea-floor spreading history in the Bransfield Basin has not proven a reliable method for estimating the age of the basin. 3 Ma. Because of the short history and the processes which formed the sea floor of the Bransfield Basin, the ages determined from interpretation of the magnetic profiles probably are not reliable. Several factors inhibit the formation, preservation, and recognition of correlatable sea­ floor spreading magnetic anomaly patterns.

And D. M. Macdonald, 1984, Processes of for­ mation and filling of a Mesozoic back-arc basin on the island of South Georgia, in B. P. Kokelaar and M. F. , Marginal Basin Geology: Volcanic and associat­ ed sedimentary and tectonic processes in modern and ancient marginal basins: Oxford, Blackwell Scientific Publications, p. 207-218. , G. H. Denton, T. J. Hughes and J. L. Fastook, 1981, History of the marine ice sheet in West Antarctica during the last glaciation: a working hypothesis, in G. H. Denton and T.

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