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Oceanic transverse ridges; a flexural response to fracture-zone-normal extension

Robert A. Pockalny, Pascal Gente and Roger Buck
Oceanic transverse ridges; a flexural response to fracture-zone-normal extension
Geology (Boulder) (January 1996) 24 (1): 71-74

Abstract

One of the most puzzling characteristics of sea-floor morphology is the occurrence of anomalously shallow, fracture-zone - parallel, oceanic transverse ridges. A model is proposed for the formation of transverse ridges near lat 21 degrees and 24 degrees N on the Mid-Atlantic Ridge in which the differential responses of large-offset and small-offset fracture zones to recent changes in spreading direction result in the generation of normal faults that coincide with the off-axis traces of fracture zones. Numerical models of the flexural response of the lithosphere to normal faulting suggest that modest amounts of extension (<5 km) along low-angle faults (<45 degrees ) are responsible for the transverse ridges.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 24
Serial Issue: 1
Title: Oceanic transverse ridges; a flexural response to fracture-zone-normal extension
Affiliation: University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States
Pages: 71-74
Published: 199601
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 15
Accession Number: 1996-007259
Categories: Solid-earth geophysicsOceanography
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch maps
N21°00'00" - N24°00'00", W47°00'00" - W44°00'00"
Secondary Affiliation: Universite de Bretagne Occidentale, URA 1278 CNRS, FRA, FranceLamont-Doherty Earth Observatory, Palisades, NY, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 199604
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