What is recorded here?
Wilson defined transform faults as shear boundaries ending at other tectonic features and used their geometry to explain apparent ridge offsets and the connected boundaries of rigid crustal regions. An ocean ridge can appear displaced sideways where it meets a fracture zone. A simple picture treats that offset as the result of one fault moving a previously continuous ridge. Wilson proposed a different geometry: new crust forms at the ridge, disappears at convergent boundaries, and slides between adjoining regions along a transform fault. Between two offset ridge segments, the predicted sense of sliding can be the opposite of that inferred from the apparent offset. Old continuations of the fracture zone can remain visible while being inactive. This distinction connected otherwise puzzling fault endings into a network of boundaries around comparatively rigid regions. The paper classified twelve possible types and discussed examples of at least six, while explicitly asking for further tests. It did not independently measure every proposed boundary, solve the driving mechanism or establish all modern plate reconstructions.
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Scientific scope
1965 geometric model of crust production, consumption and conserved shear, with twelve proposed transform types and examples of at least six. Ridge-to-ridge slip can oppose the sense inferred from apparent ridge offset; inactive traces are distinct from the active connecting segment. Many named boundary connections are proposals, not independently established global facts. Regions are approximately rigid except at edges. The source calls for further investigation, rather than claiming completed proof of all continental drift. Earlier observations, Carey concepts and later spherical/global models retain separate credit. The assessed tectonics paper covers pages 343-347. Its earthquake data and modern plate-boundary maps have not been independently reproduced or validated here. Publisher metadata gives July 1965; original header July 24 is the specific issue date. Publication/digitization dates are separate.
Read the original work
- J. Tuzo Wilson, A New Class of Faults and their Bearing on Continental Drift, original Nature scan, Harvard copy
- Publisher Crossref deposit for Wilson1965 transform-fault paper
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People and systems
J. Tuzo Wilson
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English catalogue narrative
Wilson: transform faults and the geometry of ridge offsets
Wilson defined transform faults as shear boundaries ending at other tectonic features and used their geometry to explain apparent ridge offsets and the connected boundaries of rigid crustal regions.
An ocean ridge can appear displaced sideways where it meets a fracture zone. A simple picture treats that offset as the result of one fault moving a previously continuous ridge. Wilson proposed a different geometry: new crust forms at the ridge, disappears at convergent boundaries, and slides between adjoining regions along a transform fault. Between two offset ridge segments, the predicted sense of sliding can be the opposite of that inferred from the apparent offset. Old continuations of the fracture zone can remain visible while being inactive. This distinction connected otherwise puzzling fault endings into a network of boundaries around comparatively rigid regions. The paper classified twelve possible types and discussed examples of at least six, while explicitly asking for further tests. It did not independently measure every proposed boundary, solve the driving mechanism or establish all modern plate reconstructions.
Scientific scope
1965 geometric model of crust production, consumption and conserved shear, with twelve proposed transform types and examples of at least six. Ridge-to-ridge slip can oppose the sense inferred from apparent ridge offset; inactive traces are distinct from the active connecting segment. Many named boundary connections are proposals, not independently established global facts. Regions are approximately rigid except at edges. The source calls for further investigation, rather than claiming completed proof of all continental drift. Earlier observations, Carey concepts and later spherical/global models retain separate credit. The assessed tectonics paper covers pages 343-347. Its earthquake data and modern plate-boundary maps have not been independently reproduced or validated here. Publisher metadata gives July 1965; original header July 24 is the specific issue date. Publication/digitization dates are separate.
People and systems
J. Tuzo Wilson