Lower Cretaceous deposits trapped near the equatorial Mid-Atlantic Ridge

Bonatti et al report the recovery of 140-Myr-old "Maiolica"-type pelagic limestones from the centre of the Atlantic Ocean basin. These old deposits within younger crust can be explained by repeated ridge jumping.

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Bibliographic Details
Published inNature (London) Vol. 380; no. 6574; pp. 518 - 520
Main Authors Bonatti, E, Ligi, M, Borsetti, A. M, Gasperini, L, Negri, A, Sartori, R
Format Journal Article
LanguageEnglish
Published London Nature Publishing 11.04.1996
Nature Publishing Group
Subjects
Cretaceous
Earth sciences
Earth, ocean, space
Exact sciences and technology
Marine
Ocean basins
Oceans
Petrology of sedimentary rocks except quaternary rocks
Plate tectonics
Sedimentary rocks
Stone
Stratigraphy
Tectonics. Structural geology. Plate tectonics
South America
mid-ocean ridges
West Africa
Atlantic Ocean
Brazil
Ghana
Ivory Coast
United States > US
AS, Equatorial Atlantic
AS, Mid-Atlantic Ridge
Mesozoic
Paleogene
reflection methods
gravity field
carbonate rocks
seismic profiles
passive margins
quartzites
limestone
imagery
terrigenous materials
marine sediments
clastic rocks
Romanche fracture zone
transform faults
models
shear
Tertiary
satellite methods
metamorphic rocks
offshore
siltstone
sedimentary rocks
gravity anomalies
Lower Cretaceous
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Summary:Bonatti et al report the recovery of 140-Myr-old "Maiolica"-type pelagic limestones from the centre of the Atlantic Ocean basin. These old deposits within younger crust can be explained by repeated ridge jumping.
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ISSN:0028-0836
1476-4687
DOI:10.1038/380518a0