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Saturday, August 1, 2020 | History

1 edition of Equatorial segment of the Mid-Atlantic Ridge found in the catalog.

Equatorial segment of the Mid-Atlantic Ridge

Equatorial segment of the Mid-Atlantic Ridge

initial results of the geological and geophysical investigations under the EQUARIDGE Program, Cruises of r/v "Akademik Nikolaj Strakhov" in 1987, 1990, 1991

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  • 15 Currently reading

Published by Unesco in Paris .
Written in English

    Places:
  • Mid-Atlantic Ridge.
    • Subjects:
    • Akademik Nikolaj Strakhov (Ship),
    • Geology -- Mid-Atlantic Ridge.,
    • Geophysics -- Mid-Atlantic Ridge.,
    • Mid-Atlantic Ridge.

    • Edition Notes

      Statementeditor, G.B. Udintsev.
      SeriesIntergovernmental Oceanographic Commission technical series ;, 46
      ContributionsUdint͡s︡ev, G. B., Intergovernmental Oceanographic Commission.
      Classifications
      LC ClassificationsQE350.22.M52 .E68 1996
      The Physical Object
      Paginationiii, 122 p. :
      Number of Pages122
      ID Numbers
      Open LibraryOL460185M
      LC Control Number98178253

      The Mid-Atlantic Ridge is the longest mountain chain on Earth. It runs along the Atlantic Ocean floor from North America to beyond the southern tip of Africa. It rises 6,–13,ft (2,–4,m) above the sea floor, and runs miles (16,km). Beneath the ridge is a place of great volcanic activity. The Mid Atlantic Ridge, like other ocean ridge systems, has developed as a consequence of the divergent motion between the Eurasian and North American, and African and South American Plates. As the mantle rises towards the surface below the ridge the pressure is lowered (decompression) and the hot rock starts to partially melt.

      *Mid-Atlantic Ridge* Underwater topographic feature along the margin between the diverging American crustal plate on one side and the European and African plates on the other. It runs km (mi) along the middle of the Atlantic Ocean [1].   Rusby RI () Segmentation and reorganization of the equatorial Mid-Atlantic Ridge (5°-0°N) Bridge News Google Scholar Searle RC () Multiple, closely spaced transform faults in fast-slipping fracture by: 1.

      et al., ]. Along the axis of the Mid-Atlantic Ridge, segment midpoints tend to be systematically shallower and exhibit mantle Bouguer gravity lows (bull's-eyes) at their midpoints [e.g., Kuo and Forsyth, ; Lin et al., ]. These observations suggest that . In at least eight places on the Atlantic and Pacific floors, segments of the Mid-Oceanic Ridge overlap for about 10 miles. They are called overlapping spreading centers. 7 [See Figure 4.]If plates are moving away from the Mid-Oceanic Ridge, then the distance between overlapping segments must be increasing.


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Equatorial segment of the Mid-Atlantic Ridge Download PDF EPUB FB2

Equatorial segment of the Mid-Atlantic Ridge: initial results of the geological and geophysical investigations under the EQUARIDGE Program, Cruises of r/v "Akademik Nikolaj Strakhov" in. Rifting in the central segment, however, coincided with the Cretaceous Normal Superchron (also known as the Cretaceous quiet period), a 40 Ma period without magnetic reversals, which makes it difficult to date sea-floor spreading in this segment.

The equatorial segment is the last phase of the break-up, but, because it is located on the Equator Basin countries: List of countries, ports. The Mid-Atlantic Ridge (MAR) is a mid-ocean ridge, a divergent or constructive plate boundary located along the floor of the Atlantic Ocean, and part of the longest mountain range in the the North Atlantic, it separates the Eurasian and North American plates, and in the South Atlantic, it separates the African and South American plates.

The ridge extends from a junction with the. A segment of the inner rift valley of the Mid-Atlantic Ridge was investigated in detail from the American submersible Alvin.

Fifteen traverses were made across the floor and up the first major. The 13°N segment of the Mid-Atlantic Ridge is an example of a morphologically well-studied slow spreading ridge segment populated with oceanic core complexes (OCCs).

The Mid-Atlantic Ridge south of the equator is a key region for many aspects of spreading axis studies, from biogeography to ridge-hotspot interaction. Despite this, the ridge axis had, untilseen little systematic study. Repeated trips to the area since then have mapped and explored some km of ridge length, from 2° to 14°S.

The Mid-Atlantic Ridge (MAR) is known as a mid-ocean ridge, an underwater mountain system formed by plate tectonics. It is the result of a divergent plate boundary that runs from 87° N. Regional seismicity of the Mid-Atlantic Ridge: observations from autonomous hydrophone arrays M.

Cannat, R. Dziak, Regional seismicity of the Mid-Atlantic Ridge: observations from autonomous hydrophone arrays, Geophysical Journal derived earthquake locations along the north-central Mid-Atlantic Ridge and equatorial East-Pacific Rise Cited by: The Mid-Atlantic Ridge is the longest mountain chain on Earth.

It runs along the Atlantic Ocean floor from North America to beyond the southern tip of Africa. It rises 2,–4,m (6,–13,ft) above the sea floor, and runs km (10, miles).

Beneath the ridge is a place of great volcanic activity. The Mid-Atlantic Ridge (MAR) is an underwater ocean ridge, that is a part of the largest mountain range in the world. In this article, we shall look at some interesting Mid-Atlantic ridge facts such as the process of its formation, its location, length, volcanoes, etc.

The deep-sea marine animals residing in the Mid-Atlantic Ridge region, are. The Mid-Atlantic Ridge south of the equator is a key region for many aspects of spreading axis studies, from biogeography to ridge-hotspot interaction.

Despite this, the ridge axis had, untilseen little systematic study. And so also might portions of the equatorial Mid-Atlantic Ridge and surrounding areas once have been “- with the present position - the southernmost portion of same [Atlantis].” Note that the phrase, “with the present position” (in ), clearly implies that a shift of Earth's rotational axis.

Mid-Atlantic Ridge. Main article: The equatorial segment is the last phase of the break-up, but, because it is located on the Equator, magnetic anomalies cannot be used for dating.

Various estimates date the propagation of sea-floor spreading in this segment to the period –96 Ma. (41 °F). The Landnámabók (Book of Settlement). The Reykjanes Ridge and the Northern Mid-Atlantic Ridge are south of Iceland, the former extending up to 52° N lat.

The Southern Mid-Atlantic Ridge is situated south of the equator. The transverse fractures of the Mid-Atlantic Ridge break the ridge into segments displaced by. Cambridge Core - Structural Geology, Tectonics and Geodynamics - Mid-Ocean Ridges - by Roger Searle.

The sill depth of the Mid-Atlantic Ridge in the equatorial region* W. METCALI:t. HEEZEN.~ and M. S'I-ALCUP~" (Received 5 December ) PREFACE This report is a companion paper to that of Heezen, Bunce, Hersey and Tharp entitled "" Chain and Romanche Fracture Zones," also appearing in this issue, which concerns the topography of the Cited by: Mid-Atlantic Ridge Mid-Atlantic Ridge.

Encyclopædia Britannica, Inc. The Mid-Atlantic Ridge is located at the juncture of crustal plates that form the floor of the Atlantic Ocean; it is considered a "slow-spreading" ridge by earth scientists.

Running along the crest of the ridge is a long valley that is about 50 to 75 miles (80 to km) wide. This is an old video, these are just my opinions and I realize now that I should phrase my claims in a better way.

This can be seen in Figure for the Lucky Strike segment of the Mid-Atlantic Ridge at 37°N, where the mean proportion of sheets to pillow flows of ∼ is bracketed by observations for on (∼) and off (∼) the central seamount.

In this case, the off-seamount value is closer to the globally defined trend and perhaps more Cited by: 4. This book is dedicated to the study of structure and transport of deep and bottom waters through underwater channels of the Atlantic Ocean.

The study is based on recent observations, analysis of historical data, and literature review. Equatorial segment of the Mid-Atlantic Ridge as a possible structural barrier between the North and South Atlantic. USSR Academy of Sciences Transactions (Doklady), Earth Science Sections,the spreading rate at the ridge, the higher the prop-agation rate [Phipps Morgan and Sandwell, ].

[5] At 21°30′N a propagating ridge segment, the TAMMAR segment (Figure 1), occurs at the slow spreading Mid‐Atlantic Ridge (MAR) [Gente et al., ]. The off‐axis trace left by the propagator in. The deformations of the sedimentary cover at near-latitudinal geotraverses west and east of the Mid-Atlantic Ridge in the equatorial part of ocean are compared with potential fields and variations of the V p/V s attribute at a depth of ~ km.

The features of sedimentary cover deformations in abyssal basins are formulated, as well as their differences from the undisturbed bedding of by: 2.