List of Articles سازند تیرگان Open Access Article Abstract Page Full-Text 1 - Biostratigraphy of the Tirgan Formation in Robat-Eshgh (south-west of Bojnurd) and Ghezelghan (North of Bojnurd) stratigraphic sections, and comparing them with each other. nassim Riahi عباس صادقی Mohammad Hossein Adabi حسین کامیابی شادان Open Access Article Abstract Page Full-Text 2 - Biocorrelation, Biostratigraphy and determination basal of the Aptian stage at Tirgan Formation , west of Kopeh-Dagh sedimentary basin, NE Iran Atefeh Chenarani Meysam Shafiee Ardestani Mohammad Vahidinia 10.52547/ispg.33928.11.21.78