Formation of the Scotia and Caribbean Arcs

Hamilton, Walter

doi:10.4095/103417

Cited by 7 publications

(6 citation statements)

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“…Different map projections undoubtedly fuelled early arguments over the 'fit' of continental margins, a point stressed by King (1953). a. Westward drift of South America and Antarctica leaves behind the disrupted fragments of an original connection, after Hamilton (1966). This idea can be traced back through Barth and Holmsen (1939) to Holmes (1929) and Wegener (1929).…”

Section: Epiloguementioning

confidence: 99%

Geological exploration of South Atlantic islands and its contributions to the continental drift debate of the early 20th century

Stone

2015

Proceedings of the Geologists' Association

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The geological character of the South Atlantic islands was only slowly established during the first half of the 20 th century. That same period was marked by a generally dismissive view of continental drift but, as the continental nature of the islands became apparent, their 'oceanic' setting was utilised by both sides of the 'drift' debate to support their respective positions. So islands such as the Falklands archipelago and South Georgia were cited either as fragments detached from larger continental bodies during drift, or as the last surviving vestiges of a huge continental landmass that had subsided beneath the water of the South Atlantic. The appreciation of the Scotia Arc as a dynamic geological construct arising from lateral tectonics, and the Falkland Islands as representative of an itinerant continental fragment, were features of some early accounts of the region, but such ideas were generally discounted by the geological establishment of the day. This paper reviews the early, pioneering contributions to the geological understanding of the Falkland Islands, South Georgia and the Scotia Arc region, assessing their contemporary reception and tracing their influence on the developing continental drift controversy. Though commonly dismissed or ignored at the time, many of the 'pro-drift' ideas expressed were subsequently rediscovered by proponents of plate tectonics as that revolution swept through geology in the late 1960s.

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Section: Epiloguementioning

confidence: 99%

Geological exploration of South Atlantic islands and its contributions to the continental drift debate of the early 20th century

Stone

2015

Proceedings of the Geologists' Association

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“…(Baker, 1968, p. 192;in press). Thus the chain is apparently much younger than the Lesser AntilIes, wh ich have a history extending back to the Eocene, and with which it has often been compared (Tyrrell, 1945;Hamilton, 1966). However, Barker's identification of an active spreading ridge at least 8 m.y.…”

Section: South Sandwich Islandsmentioning

confidence: 99%

“…* The fact that South Georgia represents part of the Pacific hinterland of the Andean Cordillera indicates that substantial curvature must have existed when it was separated from South America. Also, there is so me slight evidence of the bending of the Antarctic Peninsula after the late Cretaceous-early Cenozoic in the paleopole azimuths for Andean plutons (Blundell, 1962), as was pointed out by Hamilton (1966). * Again, therefore, it is likely that the CordiIIera was essentially rectilinear in the vicinity of what is now the Drake Passage, prior to oroclinal bending in the late Mesozoic-early Cenozoic.…”

mentioning

confidence: 94%

“…Analysis of new and published paleomagnetie data indieates that the Andean Cordillera underwent oroclinal bending sinee the late Cretaeeous, but that the "bent" shape of the Antaretie Peninsula is (eontrary to the view of Hamilton, 1966) older (Dalziel et al, , 1973.…”

Section: Lan W D Dalziel and David H Elliotmentioning

confidence: 99%

“…Taking into account the apparent bending of the Andean and West Antarctic Cordilleras (see Hamilton, 1966),* we now find that there is more than enough continental material to elose the Drake Passage (Fig. 9a), assuming no internal shortening or extension along the line of the Cordillera.…”

mentioning

confidence: 99%

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