BIOSTRATIGRAPHY OF THE QOM FORMATION IN THE NORTHEAST AND SOUTHEAST OF SEMNAN

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

DANESHIAN JAHANBAKHSH; CHEGINI A.R.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: GEOSCIENCES Year:2007 | Volume:16 | Issue:62 Page(s): 72-79

Download Full-Text

Persian Verion

View:

1,776

Download:

Cites:

Information Journal Paper

Title

BIOSTRATIGRAPHY OF THE QOM FORMATION IN THE NORTHEAST AND SOUTHEAST OF SEMNAN

Author(s)

DANESHIAN JAHANBAKHSH | CHEGINI A.R. | Issue Writer Certificate

Keywords

CENTRAL IRANQ2

SEMNANQ2

EARLY MIOCENEQ3

BIOSTRATIGRAPHYQ3

FORAMINIFERAQ2

QOM FORMATIONQ2

Abstract

In this study, sediments of the QOM FORMATION were investigated from the two stratigraphical sections in the northeast (Attari section) and southeast (Garmab section) of SEMNAN. The Attari section that consists mainly of limestone. Sandy limestone, sandstone, calcareous shale and marl has a thickness measured 280 meters. In this section, the QOM FORMATION lies nonconformably on basic subvolcanic rocks and is disconformably overlain by the Upper Red Formation. Garmab section, with 97.5 m thick is composed of limestone and lies disconformably between Tuff at the base and Upper Red Formations at the top. The study of 167 samples taken from the studied sections led to the identification of 31 genera and 36 species of benthonic FORAMINIFERA, I genus and species of planktonic FORAMINIFERA, 3 genera and species of red algae and 2 genera and species of bryozoa. Among them, benthonic FORAMINIFERA have more variety and abundance. So the benthonic foraminifcra from the measured sections are used to determine the age of success ions and justify their correlation. Based on the identified FORAMINIFERA, the Attari section is comparable to biozonation introduced by Adams & Bourgeois (1967). It is analogous to Bore/is melo group-Meandropsina iranica Assemblage Zone (I). According to the distribution of the index FORAMINIFERA. The age of sediments belonging to studied formation in Attari section is Burdigalian. The age of sedimcnts of the QOM FORMATION in Garmab section based on the occurrence of Triloculina tricarinata, Triloculina trigonllla and Globigerinoides triloba is probably Aquitanian.

Cites

PALEOECOLOGY OF FORAMINIFERA OF THE QOM FORMATION IN GHASR-E-BAHRAM SECTION, NORTHWEST PART OF SIAHKUH, SOUTH GARMSAR

References

میکروفاسیسها و محیط رسوبی سازند قم در منطقه سمنان

Cite

APA: Copy

DANESHIAN, JAHANBAKHSH, & CHEGINI, A.R.. (2007). BIOSTRATIGRAPHY OF THE QOM FORMATION IN THE NORTHEAST AND SOUTHEAST OF SEMNAN. GEOSCIENCES, 16(62), 72-79. SID. https://sid.ir/paper/31919/en

Vancouver: Copy

DANESHIAN JAHANBAKHSH, CHEGINI A.R.. BIOSTRATIGRAPHY OF THE QOM FORMATION IN THE NORTHEAST AND SOUTHEAST OF SEMNAN. GEOSCIENCES[Internet]. 2007;16(62):72-79. Available from: https://sid.ir/paper/31919/en

IEEE: Copy

JAHANBAKHSH DANESHIAN, and A.R. CHEGINI, “BIOSTRATIGRAPHY OF THE QOM FORMATION IN THE NORTHEAST AND SOUTHEAST OF SEMNAN,” GEOSCIENCES, vol. 16, no. 62, pp. 72–79, 2007, [Online]. Available: https://sid.ir/paper/31919/en

Related Journal Papers