Locality
41°0´ east longitude, 13°0´ north latitiude [ map ]
Name
Danakil, Ethiopia, Afrika
Personal relationship of donor
Exploration for potash
Historical relevance of location
The Danakil depression contains a salt lake and an active volcano. Salt is produced from the briny lake water, with sulphur as a by-product.
Geological relevance of location
The continent of Africa is cut by grabens, usually known as rift valleys, in which lakes have formed. Igneous magma has locally erupted at the graben edges in the form of volcanoes.
Classification of the earth
Structure
|
crystalline sulfur
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Colour
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yellow
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Age
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unknown, ?Holocene
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other
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This sulfur was formed by bacterial reduction of sulfate.
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Donor
Geoscientific Collections Section of the Federal Institute for Geosciences and Natural Resources,
Geological Survey of Lower Saxony,
Hannover,
Germany