Abstract In the central-eastern Sirt Basin, enigmatic Intisar domal structures host significant hydrocarbon accumulations. These have been commonly interpreted as pinnacle reefs/bioherms occurring in open-marine basinal environment. Generally, are mainly characterized by situ carbonates. The current study challenges reef/bioherm model examining one of terms biostratigraphy, microfacies and depo...

The depositional environment and sequence stratigraphy of the Samana Suk Formation (of CollovianBathonian age) based on field and petrographic data is presented. The formation is mainly composed of limestone with subordinate sandstone and marl. The limestone is medium to thick bedded and nodular at places with inter beds of sandstone and thin conglomerate intervals. The sandstone is reddish bro...

The end-Permian extinction and its aftermath altered carbonate factories globally for millions of years, but impact on platform geometries remains poorly understood. Here, the evolution in architecture composition two exceptionally exposed platforms Nanpanjiang Basin are constrained compared with geochemical proxies to evaluate controls geometries. Geochemical indicate elevated siliciclastic nu...

The well-known fossiliferous and lithologically variable Middle Devonian Shaly-Calcareous Skały Formation in the Łysogóry Region (northern part of Holy Cross Mountains, central Poland) was studied for first time terms elemental geochemistry, carbon isotope stratigraphy limestone microfacies. Three Lower to Givetian marly-limestone successions, exposed at Miłoszów, represent middle outer facies ...

The continental shelf of Northwest Australia hosts an extensive tropical carbonate ramp that forms important template for the interpretation similar systems in sedimentary record. Yet, little is known about its development from middle to late Quaternary, a period high frequency glacioeustatic changes sea-level and climate. This research describes core seismic-reflection data mid-ramp outer tran...

Outcrops of the Lower Triassic (Spathian) Virgin Limestone Member (Moenkopi Formation) in the southwestern United States contain the oldest known metazoan bioherms formed in the aftermath of the endPermian mass extinction. These small buildups, up to 1.0 m in diameter and 0.2 m high, were constructed by cementing bivalves. The bivalve bioherms accreted in a shallow, subtidal environment above s...

The Ediacaran-Cambrian transition interval is described for the west part of Gondwana Supercontinent. This key in Earth’s history recorded upper and lower Tagatiya Guazú Cerro Curuzu formations, Itapucumi Group, Paraguay, encompassing a sedimentary succession deposited tidally influenced mixed carbonate-siliciclastic ramp. remarkable presence cosmopolitan Ediacaran shelly fossils treptichnids, ...