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Rift flanks or shoulders are elevated areas around rifts. Rift shoulders are typically about 70 km wide. [7] Contrary to what was previously thought, elevated passive continental margins (EPCM) such as the Brazilian Highlands, the Scandinavian Mountains and India's Western Ghats, are not rift shoulders. [7]
The Midcontinent Rift System (MRS) or Keweenawan Rift is a 2,000 km (1,200 mi) long geological rift in the center of the North American continent and south-central part of the North American plate. It formed when the continent's core, the North American craton , began to split apart during the Mesoproterozoic era of the Precambrian , about 1.1 ...
(The Puerto Rico Trench is not part of the rift system.) Great Rift Valley: 6,000 km (3,700 mi) 220 km (140 mi) 2 km (1 mi) Width and depth are those of the Red Sea Rift, discounting continental shelves < 200 m deep. (These may not be the extremes of the whole rift system.) Length of the Red Sea section 2,250 km (1,400 mi).
The East African Rift (EAR) or East African Rift System (EARS) is an active continental rift zone in East Africa. The EAR began developing around the onset of the Miocene, 22–25 million years ago. [1] It was formerly considered to be part of a larger Great Rift Valley that extended north to Asia Minor.
A massive rift in Ethiopia separated continental plates by 400 feet and is part of a rift network that may flood enough to create a new ocean in 2 million years.
Divergent boundaries are typified in the oceanic lithosphere by the rifts of the oceanic ridge system, including the Mid-Atlantic Ridge and the East Pacific Rise, and in the continental lithosphere by rift valleys such as the famous East African Great Rift Valley. Divergent boundaries can create massive fault zones in the oceanic ridge system.
Researchers' new insight into the splitting process of the East Africa Rift systems show where an ocean will likely be formed if the continent's split continues.
The Baikal Rift Zone in eastern Russia; The Red Sea Rift; The Aden Ridge along the southern shore of the Arabian Peninsula; The Carlsberg Ridge in the eastern Indian Ocean; The Woodlark Basin undergoing transition from continental rifting to sea floor spreading to the east of New Guinea; The Gorda Ridge off the northwest coast of North America