Lower Miocene uncoiled Agglutinated Foraminifera From Dobaradar Section, southeast Qom

Abstract

Miocene deposits in the Middle East such as Iran are famous and significance because of good oil reservoirs and a lot of studies has been carried out for precise exploring. Iran in this region, especially in Central Iran zone, in comparison with neighbor countries is a lack of exact and comprehensive information and need more investigation. In this way, study of foraminiferal assemblages for ascertain paleoenvironment characteristics and age determination is one of the researchers aims. Complicate and various characteristics of the Qom Formation in Central Iran such as depositional environments, faunal assemblage, age and lithology has caused that the information from its investigation be utilized and noticed for understanding connection of Indian Ocean and Mediterranean sea as a part of Tethyan Sea way in Oligo- Early Miocene. Agglutinated smaller foraminifera are one of the faunal groups which present in the Qom Formation in Dobaradar section. However, comparison with other forams with hyaline and porcelaneous tests, have less diversity and abundance. In this research, for the first time the early Miocene uncoiled agglutinated foraminifera from the Qom Formation in type area has been studied. Investigation of foraminifera in southeast of Qom, led to recognition a new species and report of 4 genera and 6 species for the first time from Iran. Among these Agglutinated forams, 2 species belong to Aquitanian and 2 present in Burdigalin, and the rest of them belong to Aquitanian- Burdigalian.

Keywords

• Smaller foraminifera
• Textularid
• Qom Formation
• Southeast Qom
• Central Iran