This complex occurs within the Prisevanskaya zone, in the central part of the Bazumsky range of the Caucasus Mountains. The Garnasar outcrops of alkaline rocks cover an area of 12 km2 and represent a subvolcanic, laccolith-like body which is confined to a system of northeast-trending faults.
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This massif is an intrusion covering about 10 km2. It is formed of a single intrusive phase, which is represented by nepheline-kalsilite monzonites, essexites and medium- and fine-grained syenites.
The Bunduk intrusion is situated several kilometres northeast of the Tezhsar complex on the southern slope of the Bazumsky mountain range. This is a dyke-like body expanding at its eastern end to a width of 2 km. There are also several smaller bodies in the vicinity with areas up to 1 km2.