Definition of obduction in English:
obduction
noun ɒbˈdʌktʃ(ə)nəbˈdəkʃ(ə)n
mass nounGeology The sideways and upwards movement of the edge of a crustal plate over the margin of an adjacent plate.
movement of the ophiolite so far south before obduction is unlikely
Example sentencesExamples
- During the Cretaceous, however, an ocean basin existed in this area, either as a remnant ocean that had escaped Jurassic obduction or as a small Cretaceous pull-apart basin.
- Late Cretaceous obduction of ophiolite complexes onto the Indian shield has also been reported from Pakistan.
- However, even in the absence of tectonic boundary loads, ophiolitc obduction imposes significant stresses on the flexed plate.
- The Papua New Guinea continental crust appears to be underthrusting the adjacent marginal basin and obduction of the ophiolite is occurring in an uphill direction.
- After obduction, there was a slow rate of subsidence, which reflects the continuing cooling of the underlying Indian lithosphere after rifting.
Derivatives
verb ɒbˈdʌktəbˈdək(t)
[with object]Geology Cause (the edge of a crustal plate) to move sideways and upwards over the margin of an adjacent plate.
the ophiolite complex was obducted onto the continental margin
Example sentencesExamples
- Early Cretaceous back-arc spreading in southern Patagonia was also sufficient to create new ocean floor, which was subsequently obducted in the Middle Cretaceous, forming the Rocas Verdes Ophiolite.
- It is proposed that the Sogneskollen Granitic Complex formed when young and hot oceanic crust was obducted above the continental margin.
- The suture lies along the line of the South Mayo-Highland Border ophiolites that were obducted onto the northern edge of the Midland Valley Terrane.
Origin
1970s: from Latin obduct- 'covered over', from the verb obducere, from ob- 'against, towards' + ducere 'to lead'.
Definition of obduction in US English:
obduction
nounəbˈdəkSH(ə)nəbˈdəkʃ(ə)n
Geology The sideways and upwards movement of the edge of a crustal plate over the margin of an adjacent plate.
movement of the ophiolite so far south before obduction is unlikely
Example sentencesExamples
- During the Cretaceous, however, an ocean basin existed in this area, either as a remnant ocean that had escaped Jurassic obduction or as a small Cretaceous pull-apart basin.
- However, even in the absence of tectonic boundary loads, ophiolitc obduction imposes significant stresses on the flexed plate.
- After obduction, there was a slow rate of subsidence, which reflects the continuing cooling of the underlying Indian lithosphere after rifting.
- The Papua New Guinea continental crust appears to be underthrusting the adjacent marginal basin and obduction of the ophiolite is occurring in an uphill direction.
- Late Cretaceous obduction of ophiolite complexes onto the Indian shield has also been reported from Pakistan.
Origin
1970s: from Latin obduct- ‘covered over’, from the verb obducere, from ob- ‘against, towards’ + ducere ‘to lead’.