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Separating the African (or Nubian-Somali plates) and Antarctic plates, the Southwest Indian Ridge (SWIR) stretches 7,700 km (4,800 mi) from the Atlant
Separating the African (or Nubian-Somali plates) and Antarctic plates, the Southwest Indian Ridge (SWIR) stretches 7,700 km (4,800 mi) from the Atlantic Ocean to the Indian Ocean. With an average spreading rate of 14–15 millimetres per year (0.55–0.59 in/year), the SWIR is one of the slowest-spreading mid-ocean ridges on Earth. Characterised by numerous large transform offsets, most of the SWIR is highly segmented and oblique relative to the spreading direction.
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Rift zone in Þingvellir National Park, Iceland. The island is a sub-aerial part of the Mid-Atlantic Ridge
Rift zone in Þingvellir National Park, Iceland. The island is a sub-aerial part of the Mid-Atlantic Ridge
Magnesium/calcium ratio changes at mid-ocean ridges
Magnesium/calcium ratio changes at mid-ocean ridges