Geology, Geomorphology and Genesis of Andarokh Karstic Cave, North-East Iran
Andarokh basin is one of the main karstic regions in Khorasan Razavi province NE Iran. This basin is part of Kopeh-Dagh mega zone extending from Caspian Sea in the east to northern Afghanistan in the west. This basin is covered by Mozdooran Formation, Ngr evaporative formation and quaternary alluvium deposits in descending order of age. Mozdooran carbonate formation is notably karstified. The main surface karstic features in Mozdooran formation are Groove karren, Cleft karren, Rain pit, Rill karren, Tritt karren, Kamintza, Domes, and Table karren. In addition to surface features, deep karstic feature Andarokh Cave also exists in the region. Studying Ca, Mg, Mn, Sr, Fe concentration and Sr/Mn ratio in Mozdooran formation samples with distance to main faults and joints system using PCA analyses demonstrates intense meteoric digenesis role in controlling carbonate rock geochemistry. The karst evaluation in Andarokh basin varies from early stages 'deep seated karst' in Mesozoic to mature karstic system 'Exhumed karst' in quaternary period. Andarokh cave (the main cave in Andarokh basin) is rudimentary branch work consists of three passages of A, B and C and two entrances Andarokh and Sky.
 A. Aghanabati, Geology of Iran. Iran geological survey publication, 2014.
 M. Heydarizad, and M. Mohammadzadeh, “Studying Hydrochemical and Stable Isotopes Signatures of Water Resources Hosted by Carbonate-Evaporative Formations in Andarokh-Kardeh Region, north-eastern Iran” African earth science journal. Submitted for publication.
 M. Heydarizad, and H. Mohammadzadeh, “Studying the geochemistry and geomorphology of karst in Mozdooran Formation (case study: All-Andarokh valley-north of Mashhad city, NE Iran)” 30 th symposium of Iran Geological Survey (GSI), Tehran, Iran, 2011, p.15.
 A.N. Palmer, “Origin and morphology of limestone caves.” Geological Society of America Bulletin, Vol.103, 1991, pp. 1-21.
 J.W. Morse, and F.T. Mackenzie, “Geochemistry of Sedimentary carbonates” New Yorks, Elsevier, 1990, pp. 707.
 H. Karimi Vardenjani, “Karst Hydrogeology (conceptual and methods)” Eram Publication, 2010, pp.432.
 A. B. Klimchouk, D.C. Ford, A. N. Palmer, and W. Dreybrodt, “Speleogensis, Evaluation of Karst Aquifers.” International union of speleology, Hardbound, 2000, pp. 527.