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- Broken_Ridge abstract "Broken Ridge or Broken Plateau is an oceanic plateau in the south-eastern Indian Ocean. Broken Ridge once formed a large igneous province (LIP) together with the Kerguelen Plateau. When Australia and Antarctica started to separate, Broken Ridge and the Kerguelen Plateau got separated by the Southeast Indian Ridge. Alkalic basalt from Broken Ridge has been dated to 95 Ma.Broken Ridge stretches 1,200 km (750 mi) from the southern end of Ninety East Ridge towards the south-western corner of Australia. It is up to 400 km (250 mi) wide and reaches 1,000 m (3,300 ft) below sea level. It is separated from the Diamantina Fracture Zone on its southern side by a 3,000 m (9,800 ft) escarpment, while on the northern side the ridge slopes gently towards the abyssal Wharton Basin. The sediment cover on the ridge reaches 800 m (2,600 ft) and the Moho is found at about 20 km (12 mi). It is separated from the Naturaliste Plateau by the Dirck Hartog Ridge.The Kerguelen LIP covered 2.3×10^6 km2 (0.89×10^6 sq mi) making it the second largest LIP on Earth (after the Ontong Java Plateau in the Pacific). Both these enormous LIPs reaches 2–4 km (1.2–2.5 mi) above the surrounding ocean floor and have a crustal thickness of 20–40 km (12–25 mi) (compared to oceanic crust typically around 7 km (4.3 mi) thick.)The Broken Ridge and Kerguelen Plateau are now separated by 1,800 km (1,100 mi). When they broke-up, the southern flank of Broken Ridge was uplifted some 2,000 m (6,600 ft) and reached above sea level.The Kerguelen LIP has long and complicated history, however, and is probably the least "typical" of all LIPs.Rocks from both the Broken Ridge and the Kerguelen Plateau contain a continental component or "fingerprint". In the Early Cretaceous, the Kerguelen hotspot was split into several diapirs of various sizes, composition, and ascent rates. These separate diapirs created the Bunbury Basalt, the Southern Kerguelen Plateau, the Rajmahal Traps/Indian lamprophyres, Antarctic lamprophyres, and the Central Kerguelen Plateau/Broken Ridge. In the late Cretaceous, activity in the mantle slowed and the Kerguelen hotspot was reduced to a single plume which created the Ninety East Ridge.120-95 Ma when the Southern and Central Kerguelen Plateau formed together with the Broken Ridge, the Kerguelen hotspot produced 1 km3 (0.24 cu mi)/year, but 95-25 Ma the output decreased to 0.1 km3 (0.024 cu mi).".
- Broken_Ridge thumbnail Seir.png?width=300.
- Broken_Ridge wikiPageExternalLink SYNTH.PDF.
- Broken_Ridge wikiPageExternalLink 07apr.
- Broken_Ridge wikiPageExternalLink books?id=fRazBwAAQBAJ&pg=PA80.
- Broken_Ridge wikiPageExternalLink Leg_183_EPSL_2000.pdf.
- Broken_Ridge wikiPageID "47943235".
- Broken_Ridge wikiPageLength "6703".
- Broken_Ridge wikiPageOutDegree "24".
- Broken_Ridge wikiPageRevisionID "683008312".
- Broken_Ridge wikiPageWikiLink Alkalic.
- Broken_Ridge wikiPageWikiLink Alkalinity.
- Broken_Ridge wikiPageWikiLink Australia.
- Broken_Ridge wikiPageWikiLink Basalt.
- Broken_Ridge wikiPageWikiLink Bunbury_Basalt.
- Broken_Ridge wikiPageWikiLink Category:Cretaceous_volcanism.
- Broken_Ridge wikiPageWikiLink Category:Large_igneous_provinces.
- Broken_Ridge wikiPageWikiLink Category:Plateaus_of_the_Indian_Ocean.
- Broken_Ridge wikiPageWikiLink Diamantina_Fracture_Zone.
- Broken_Ridge wikiPageWikiLink Diapir.
- Broken_Ridge wikiPageWikiLink Dirck_Hartog_Ridge.
- Broken_Ridge wikiPageWikiLink Indian_Ocean.
- Broken_Ridge wikiPageWikiLink Kerguelen_Plateau.
- Broken_Ridge wikiPageWikiLink Kerguelen_hotspot.
- Broken_Ridge wikiPageWikiLink Lamprophyre.
- Broken_Ridge wikiPageWikiLink Large_igneous_province.
- Broken_Ridge wikiPageWikiLink Mohorovičić_discontinuity.
- Broken_Ridge wikiPageWikiLink Naturaliste_Plateau.
- Broken_Ridge wikiPageWikiLink Ninety_East_Ridge.
- Broken_Ridge wikiPageWikiLink Oceanic_plateau.
- Broken_Ridge wikiPageWikiLink Ontong_Java_Plateau.
- Broken_Ridge wikiPageWikiLink Rajmahal_Traps.
- Broken_Ridge wikiPageWikiLink Southeast_Indian_Ridge.
- Broken_Ridge wikiPageWikiLink Wharton_Basin.
- Broken_Ridge wikiPageWikiLink File:Seir.png.
- Broken_Ridge wikiPageWikiLinkText "Broken Ridge".
- Broken_Ridge hasPhotoCollection Broken_Ridge.
- Broken_Ridge wikiPageUsesTemplate Template:Cite_book.
- Broken_Ridge wikiPageUsesTemplate Template:Cite_journal.
- Broken_Ridge wikiPageUsesTemplate Template:Cite_web.
- Broken_Ridge wikiPageUsesTemplate Template:Convert.
- Broken_Ridge wikiPageUsesTemplate Template:Coord.
- Broken_Ridge wikiPageUsesTemplate Template:Large_igneous_provinces.
- Broken_Ridge wikiPageUsesTemplate Template:Location_map.
- Broken_Ridge wikiPageUsesTemplate Template:Refbegin.
- Broken_Ridge wikiPageUsesTemplate Template:Refend.
- Broken_Ridge wikiPageUsesTemplate Template:Reflist.
- Broken_Ridge subject Category:Cretaceous_volcanism.
- Broken_Ridge subject Category:Large_igneous_provinces.
- Broken_Ridge subject Category:Plateaus_of_the_Indian_Ocean.
- Broken_Ridge hypernym Plateau.
- Broken_Ridge point "-31.0 95.0".
- Broken_Ridge type Place.
- Broken_Ridge type SpatialThing.
- Broken_Ridge comment "Broken Ridge or Broken Plateau is an oceanic plateau in the south-eastern Indian Ocean. Broken Ridge once formed a large igneous province (LIP) together with the Kerguelen Plateau. When Australia and Antarctica started to separate, Broken Ridge and the Kerguelen Plateau got separated by the Southeast Indian Ridge.".
- Broken_Ridge label "Broken Ridge".
- Broken_Ridge lat "-31.0".
- Broken_Ridge long "95.0".
- Broken_Ridge wasDerivedFrom Broken_Ridge?oldid=683008312.
- Broken_Ridge depiction Seir.png.
- Broken_Ridge isPrimaryTopicOf Broken_Ridge.