Geological
highlights in South-Algeria
(2007)
Start from the camp in Tamanrasset
The driver crew
First basalt columns on the way to the
Hoggar mountains
Overturned basalt columns
Guelta with granites above the
Precambrian basement
Basaltic lava-field in the same guelta
Beautiful basalt columns nearby the
Assekrem summit
Panorama view from top of the Assekrem
An unexpected coincidence
High noon; temperature under the tree:
35°C
Geological meeting
New drinking water reserves
Granitic ring-pluton Tilhaliouine
(23° 18' N / 4° 43' E)
Inside of Tilhaliouine
Granite wall of the Tilhaliouine
On the way: Outcrop of
methamorphic Precambrian sediments
Methamorphic Precambrian sediments
Outcrop of Precambrian marble
Ouksem -- a young explosive
double-crater (23° 55' N / 5° 49' E)
The eruption had imbued through a old granitic dome
The northern part of Ouksem with
a soda-lake
The southern part of Ouksem with
granitic walls
Typical ash-layers on the crater rim
First Tassili-sandstone on Precambrian
basement
Paleozoic Tassili-sandstone with fluvial
cross-bedding
Satellite-image from the outcrop of
Precambrian marble, quatzite and amphibolite
The same strip on the bottom
Outcrop of Precambrian marble in this
strip
Position: 22° 55' 36" N / 7° 33'
26" E
Again an outcrop of beautiful
Precambrian marble
Position: 22° 43' 11" N / 8° 21'
09" E
Granitic ring-pluton Tin Eroras
(23° 43' N/ 8° 30' E)
Inside the ring-pluton Tin Eroras
with contact-methamorhic sandstones on
top
Isolated outcrop of cross-bedded Tassili sandstones
with ripple marks
The large Tassili plateau at the horizon
The Tassili plateau
Enormous walls of sandstones
The discordance between Precambrian
basement and Paleozoic Tassili-sandstone
Detail
The geological tour is finished
in the Oasis Djanet