Geology Reference
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Figure 5.5 South Caspian Depression. Schematic geologo-tectonic map of SW
Kobystan. 1 . Quaternary; 2. Diatomaceous Fm.; 3. Chokrackian Horizon; 4. Maikopian;
5.  Anticlines: 1. Gidzhaki-Akhtarma, 2. Nardaran-Akhtarma, 3. Cheildag, 4. Sundi,
5.  East Sundi, 6.  Cheildag, 7. Ilkhichi, 8.  Adjiveli, 9. East Adjiveli, 10. Umbaki, 11. Ragim,
12.  Arzani-Klych, 13. Donguzdyk.
All of these create a specific hydrogeological situation in the series. On
the one hand, it prevents the development of infiltration regime in the
exposed areas (taking into account the balance between the precipitation
and the absence of regional ground water discharge). On the other hand,
it restricts the elision water-exchange for the same reasons (Rachinsky,
Vezirova and Fridman, 1972).
Previous studies (Akhundov, Mekhtiyev and Rachinsky, 1976; Rachinsky,
Vezirova and Fridman, 1972; Rachinsky, Djavadov and Fridman, 1973)
showed that in the Southwest Kobystan and Apsheron Peninsula the pen-
etration of surface sulphate-sodium waters into the Paleogene-Miocene
deposits is insignificant. It involves only small areas of the exposed res-
ervoirs without any substantial effect on the hydrochemical environment
on the flanks and plunges of the folds. Regional faults reaching 2,000 m
of throw separate local structures of the Southwest Kobystan from the
Djeyranchekmes Depression, hence, from the South Caspian Depression
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