Goboboseb Mts, Brandberg Area, Dâures, Erongo Region, Namibia
|Latitude & Longitude (WGS84):||21° 9' 5'' South , 14° 18' 20'' East|
|Latitude & Longitude (decimal):||-21.15139,14.30556|
|Age:||132.14 ± 0.40 to 131.90 ± 0.58 Ma|
|Geologic Time:||Early Cretaceous|
|Dating method:||The most recent dates (|
|Reference for age:||https://web.archive.org/web/20070317033342/http://www.oxfordjournals.org/our_journals/petroj/online/Volume_39/Issue_02/html/egb091_gml.html|
|Köppen climate type:||BWk : Cold desert climate|
The Goboboseb Mountains cover an area of 1100 km² and are assigned to the Awahab Formation consisting of interbedded basalts & quartz latites that form part of the 132-135 million-year-old Etendeka Group. Strong evidence suggests the source of the Gobobobseb volcanic rocks comes from the Messum Complex. The highest peak of these mountains is the Tafelkop.
NOTE: The actual mountains where the famous amethyst and quartz crystals (sometimes in sceptre form) is mined are the Goboboseb Mountains (basalts of volcanic origin), located approximately 35 km west of the Brandberg (specimen labels often give the locality as Brandberg). The name "Brandberg crystal" or "Brandberg quartz" originates from the fact that the Brandberg (granite massif!) is a worldwide known name and it is easier to explain than the Goboboseb range.
Mineral ListMineral list contains entries from the region specified including sub-localities
25 valid minerals. 1 erroneous literature entry.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
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Entries shown in red are rocks recorded for this region.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Cretaceous - Jurassic|
66 - 201.3 Ma
Age: Mesozoic (66 - 201.3 Ma)
Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. 
100.5 - 145 Ma
|Mesozoic volcanic rocks|
Age: Early Cretaceous (100.5 - 145 Ma)
Stratigraphic Name: Etendeka Flood Basalt
Lithology: Mafic volcanic rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529.