Biostratigraphy and environmental reconstruction of the akashat formation (paleocene phosphatic sequence), Western Desert, Iraq
Other Title(s)
الطباقية الحياتية و البيئة الترسيبية لتكوين عكاشات (تتابع الباليوسين الفوسفاتي)، الصحراء الغربية، العراق
Joint Authors
Muhammad, Sahirah Abd al-Karim
al-Kubaysi, Kifah Nuri
Source
Iraqi Bulletin of Geology and Mining
Issue
Vol. 16, Issue 2 (31 Dec. 2020), pp.1-20, 20 p.
Publisher
Ministry of Industry and Minerals Iraqi Geological Survey
Publication Date
2020-12-31
Country of Publication
Iraq
No. of Pages
20
Main Subjects
Earth Sciences, Water and Environment
Topics
Abstract EN
The exposure of the Paleocene sequence (Akashat Formation) in the Rutbah area is distributed in a relatively thin N – S strip extending from north of the Ga'ara depression down to the Iraqi – Saudi Arabian international border, and it is roughly 40 – 50 m thick, truncated east of the Ga'ara depression.
The Paleocene sequence, in its exposures north and west of Rutbah area, is phosphatic.
The biostratigraphy and depositional environment of the surface exposure of the sequence and that of borehole sections to the west of the exposure areas is studied in some detail in this work.
The Paleocene sequence is conformably overlain by the Eocene sequence throughout the exposed and subsurface sections (except in the eastern side of the Ga'ara depression).
The underlying sequence belongs to the Late Cretaceous with a hiatus of variable durations.
South of Rutbah – Amman highway the break is relatively shorter than that in the Akashat area, especially along the western and northern rims of the Ga'ara depression.
In boreholes to the west, the Paleocene sequence increases in thickness, the break with the underlying Late Cretaceous sequence may be negligible or missing.
The following planktonic zones are recorded from subsurface and surface sections:-
American Psychological Association (APA)
Muhammad, Sahirah Abd al-Karim& al-Kubaysi, Kifah Nuri. 2020. Biostratigraphy and environmental reconstruction of the akashat formation (paleocene phosphatic sequence), Western Desert, Iraq. Iraqi Bulletin of Geology and Mining،Vol. 16, no. 2, pp.1-20.
https://search.emarefa.net/detail/BIM-986097
Modern Language Association (MLA)
Muhammad, Sahirah Abd al-Karim& al-Kubaysi, Kifah Nuri. Biostratigraphy and environmental reconstruction of the akashat formation (paleocene phosphatic sequence), Western Desert, Iraq. Iraqi Bulletin of Geology and Mining Vol. 16, no. 2 (2020), pp.1-20.
https://search.emarefa.net/detail/BIM-986097
American Medical Association (AMA)
Muhammad, Sahirah Abd al-Karim& al-Kubaysi, Kifah Nuri. Biostratigraphy and environmental reconstruction of the akashat formation (paleocene phosphatic sequence), Western Desert, Iraq. Iraqi Bulletin of Geology and Mining. 2020. Vol. 16, no. 2, pp.1-20.
https://search.emarefa.net/detail/BIM-986097
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 17-20
Record ID
BIM-986097