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Article Type

Review Article

Corresponding Author

hal-turki@live.com

Highlights

Q1

We confirm that the No fund and the corresponding grant IDs have been correctly acknowledged in the manuscript in accordance with the funder policies.

Q2

Please correct the corresponding author from 

Corresponding author at: National Center for Development of Vegetation Cover and Combating Desertification, Saudi

Arabia.

To

Hussam Turki: hal-turki@live.com

Q3-Q6

All is correct. No changes were required

Q7: 

For affiliation of Murad A. Farrag b

Please correct to

Murad A. Abdulfarrajb-c

c Department of Petroleum Geology and Sedimentology, Faculty of Earth Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia

b Geohazards Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia; 

Abstract

The Kimmeridgian Arab Formation (D Member) represents one of the most significant petroleum reservoirs in the world. The Degla section, situated in the eastern part of the North Riyadh UNESCO Global Geopark, offers outstanding natural exposures that preserve a diverse array of carbonate lithofacies and a rich assemblage of trace fossils. This study investigates the vertical facies transitions, depositional environments, and ichnological characteristics of the Arab-D Member, utilizing the Degla outcrops in the Eastern North Riyadh UNESCO Global Geopark as a surface analogue for characterizing the world's largest subsurface reservoir. Detailed sedimentological and petrographic analyses reveal a complex interplay of microbial, skeletal, and evaporitic facies, reflecting the dynamic nature of shallow-marine depositional systems. The results enhance our understanding of reservoir heterogeneity, diagenetic evolution, and the broader significance of the Arab-D succession in terms of petroleum geoheritage.

Keywords

Petroleum Geoheritage, Lithofacies, Arab-D, Geopark, Saudi Arabia

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