This report describes a generalized geological column for part of the Amiranian Oil Company concession in northeastern Iran, north of the main road from Teheran to Meched. The column, which is based chiefly on reconnaissance investigations by F. Reeves and B. F. Buie, shows a thickness of 30,000 ± feet of Mesozoic and Cenozoic sedimentary formations and 7,000 ± feet of Paleozoic strata. The formations of widest areal extent are Liassic, Upper Jurassic, Cretaceous, Eocene, and Miocene in age. One of the best control sections for the Cretaceous and adjacent formations is northeast of Meched, where the Cretaceous totals 9,000± feet. A marine Middle Eocene (Lutetian) formation, totaling 575 feet thick, rests unconformably on "red beds" of probable Danian age. U per Senonian rudists and other megafossils occur in a 600-foot member immediately below these "red beds." At the base of the Cretaceous section is the "Red Grit Series," which is unconformably underlain by limestone containing Tithonian fossils. Orbitolina is present in oolitic limestones of Aptian age in the lower part of the Cretaceous sequence at many localities. No strictly marine fossils were collected from formations younger than Eocene.

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