| Abstract:
The study of planktonic foraminifera of the Gurpi Formation at Lar area (Kuh-e-Gach) led to recognition of 8 genera and 16 species of the planktonic foraminifera.
Four biozones were determined in the Gurpi Formation including: Globotruncana ventricosa zone (Middle Campanian), Globotruncanita ca1caratazone (upper part of Middle Campanian), Globotruncanita stuarti zone (lower part of Upper Campanian), Gansserina gansseri zone (upper part of Upper Campanian-Middle Maastrichtian). Study of the morphotype groups of planktonic foraminifera represents a relatively deep marine condition for deposition of the Gurpi Formation at the study area.
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