List of articles (by subject) Stratigraphy
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Open Access Article
1 - Carbonate Sequence stratigraphy of Turonian Wadi Es Sir Formation in Irbid, north Jordan
Amer Al-jibouri Muthana Al-tharb Basim Al-kubaisiThis study investigates the Sequence stratigraphy and depositional environment of Wadi Es Sir Formation (Turonian) in Irbid City. The Wadi Es Sir Formation consists of thick bedded to massive limestone, dolomitic limestone and dolomite. Based on Petrographic study Eight MoreThis study investigates the Sequence stratigraphy and depositional environment of Wadi Es Sir Formation (Turonian) in Irbid City. The Wadi Es Sir Formation consists of thick bedded to massive limestone, dolomitic limestone and dolomite. Based on Petrographic study Eight facies wreeidentified in the studied sections These are mudstone, gastropoda peloidal packstone, algal-lithoclast wackestone to packstone, peloidal foraminifera wackestone to packstone, bioclastic wackestone to packstone foraminifera wackestone, rudist framestone and pelletal grainstone. These facies weredeposited on the followingenvironments: restricted marine, shallow open marine and shoal environments.Sequence stratigraphystudy in Wadi Es Sir Formation identified forth-order cycles which are asymmetrical and consist of transgressive systems tract (TST) represented by shallow open marine and sometime shoal facies, followed by highstand systems tract (HST) represented by restricted marine facies. They are bounded below by a transgressive surface (Ts) and above by marine flooding surface (mfs). They represent successive episodes of relative sea level rise and stillstands. The nature of these cycles (composition and symmetry) reflects the combined effect of local tectonics and eustasy. Manuscript profile -
Open Access Article
2 - Facies analysis and sequence stratigraphy of lower-middle Miocene Euphrates formation (WadiHajar), West of Iraq
Muthana Al-Tharb Abdulhameed Al-Hadaithy Furat Al-Musawi Amer Al-JibouriThe section located in WadiHajar, Haditha area, west of Iraq was sampled for microfacies analysis of the Euphrates Formation. Microfacies analysis led to the recognition of eleven microfacies association types; Mudstone, Peloidalgrainstone, ooidsgrainstone, Miliolids-Pe MoreThe section located in WadiHajar, Haditha area, west of Iraq was sampled for microfacies analysis of the Euphrates Formation. Microfacies analysis led to the recognition of eleven microfacies association types; Mudstone, Peloidalgrainstone, ooidsgrainstone, Miliolids-Peneroplidsgrainstone, Peneroplidsgrainstone, Echinoidalwackestone, Miliolidswackestone, Alveolinidswackestone, Bioclasticpackstone, Peneroplidspackstone and Rotaliidspackstone, were deposited in restricted marine, shoal, and open marine environments. The study of the vertical succession of microfacies shows four primary 4th order cycles (1, 2, 3, and 4) each show a different episode of stills tands sea level rises. Cycle 1 is represented by LST of basal conglomerate followed by a thick succession of open marine facies of TST, overlain by sh0rt episode of still stand. According to minor sea level changes, cycle 2 is subdivided into 2a, 2b, and 2c consisting TST of bioclastic, miliolids, peloidswackestone to packstone, followed by thin HST consisting restricted marine facies. Cycle 3 consists of a short episode of sea level rise of TST followed by a long episode of sea level still standing and subdivided into 3a and 3b. Cycle 4 is marked by open marine facies (TST), overlain by HST of restricted marine facies. The low subsidence rate and eustatic sea-level fluctuation are the main factors that affect the study area. Manuscript profile