Deriba caldera

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Deriba caldera
Deriba Caldera in the Jebel Marra volcanic field

Deriba Caldera in the Jebel Marra volcanic field

height 3042  m
location Darfur , Sudan
Mountains Marra
Coordinates 12 ° 57 '5 "  N , 24 ° 15' 32"  E Coordinates: 12 ° 57 '5 "  N , 24 ° 15' 32"  E
Deriba Caldera (Sudan)
Deriba caldera
Type Volcanic field
Last eruption 2000 BC Chr.
particularities two water-filled crater lakes

The Deriba Caldera is the highest point in Sudan with a height of 3,042 m . The volcano is part of the Jebel Marra in Darfur . The outer crater is between 5 km and 8 km in diameter. The inner crater has a crater lake . The Marra Mountains are part of a geological structure called the Darfur Dome . It is a hotspot in the earth's mantle that heats the earth's crust and thus creates buoyancy. It is the source of the magma of the volcanoes in the area.

The caldera was built around 2000 BC. Formed during an explosive eruption of the Jebel Marra volcano. The volcano is considered dormant, so it is not dead. There are hot springs and fumaroles in the area . The caldera was created after the collapse of the cavity created by the eruption. Inside the caldera there is a second water-filled crater. Since the inner crater rim lies above the crater floor, the water cannot run into the inner crater, which is why a second lake has formed in the northeast of the caldera. The lakes are probably fed by the hot springs as well as by rainwater. Since Jebel Marra is very high, there is a temperate climate with relatively frequent rainfall.

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  • Deriba Caldera, Sudan at NASA Earth Observatory
  • JHG Lebon, VC Robertson, The Jebel Marra, Darfur, and Its Region in The Geographical Journal , Vol. 127, no. 1 (Mar., 1961), pp. 30-45 JSTOR 1793193
  • HFC Hobbs, Notes on Jebel Marra, Darfur in The Geographical Journal , Vol. 52, No. 6 (Dec., 1918), pp. 357-363 JSTOR 1780270
  • KS Sandford, Sources of Water in the North-Western Sudan , The Geographical Journal , Vol. 85, no. 5 (May, 1935), pp. 412-431 JSTOR 1785619
  • Tephra catalog of the world [1]
  • Francis & Oppenheimer: Volcanoes: chapter 2, Keeping planets cool: volcanoes, hotspots, and plate tectonics , [2] p. 27, Fig .: 2.10
  • Comparing Jebel Marra with a volcanoes on Mars (Alba Patera): [3]
  • (UNESCO) Fact-finding mission to Sudan, 8-20 May 2001: for an investigation of Sudan's Geothermal Resources, The Jebel Marra Area: [4]
  • The Culex mosquitos of the Sudan: [5]

Web links