Outcrop-subcrop sequence and diagenesis of upper jurassic arab-hith formations, Central Saudi Arabia
Other Title(s)
التتابع السطحي-تحت السطحي و عمليات النشأة المتأخرة لتكويني العرب-الهيت (الجوراسي العلوي) في وسط المملكة العربية السعودية
Source
Journal of King Abdulaziz University : Earth Sciences
Issue
Vol. 4, Issue 1 (31 Dec. 1991), pp.105-136, 32 p.
Publisher
King Abdulaziz University Scientific Publishing Center
Publication Date
1991-12-31
Country of Publication
Saudi Arabia
No. of Pages
32
Main Subjects
Earth Sciences, Water and Environment
Abstract EN
Outcrop-subcrop of the Upper Jurassic Arab-Hith Formations in central Saudi Arabia were studied in detail.
The Arab Formation is mostly poorly exposed owing to the extensive slumping, collapsing and breeciation resulted from the dissolution of the interbedded anhydrite units.
Except for an excellent exposure at Dahl Hit and limited exposures to the east of Al-Hair and Al-Badi (Fig.
3).
the Hith outcrop had been removed totally by underground water solution of the anhydrite.
A composite stratigraphic sequence of the Arab and Hith was established from the outcrop-subcrop relationship.
Four carbonate units have been recognized; the basal unit is generally persistent and undisturbed, whereas three other units are mostly made of slumped, contorted and fractured limestones as well as of breeciated limestone.
While most of the coarsegrained limestone of the Arab in the outcropping area underwent leaching and reerystallization, the rocks in the subcrop were leached, recrystallizcd and dolomitized.
Dissolution of the Arab-Hith anhydrite units has caused seriousgeotech-nieal problems such as slumping, breeciation, cavities, vugs and fractures of the rocks in the outcrop-subcrop areas.
Presence of vertical fractures and possible presence of permeability barriers to the east of the Sulaiy (Lower Cretaceous) escarpment seem to have caused the rise of the underground water table in the Riyadh area, which may further introduce potential health hazards by vertical charging of the sewage water into the underlying Riyadh Aquifer.
American Psychological Association (APA)
Sharif, Faruq A.& Khan, Muhammad S.& Magara, Kinji. 1991. Outcrop-subcrop sequence and diagenesis of upper jurassic arab-hith formations, Central Saudi Arabia. Journal of King Abdulaziz University : Earth Sciences،Vol. 4, no. 1, pp.105-136.
https://search.emarefa.net/detail/BIM-400347
Modern Language Association (MLA)
Sharif, Faruq A.…[et al.]. Outcrop-subcrop sequence and diagenesis of upper jurassic arab-hith formations, Central Saudi Arabia. Journal of King Abdulaziz University : Earth Sciences Vol. 4, no. 1 (1991), pp.105-136.
https://search.emarefa.net/detail/BIM-400347
American Medical Association (AMA)
Sharif, Faruq A.& Khan, Muhammad S.& Magara, Kinji. Outcrop-subcrop sequence and diagenesis of upper jurassic arab-hith formations, Central Saudi Arabia. Journal of King Abdulaziz University : Earth Sciences. 1991. Vol. 4, no. 1, pp.105-136.
https://search.emarefa.net/detail/BIM-400347
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 134-135
Record ID
BIM-400347