SEDIMENTARY FACIES ARCHITECTURE, DEPOSITIONAL MODEL AND SEQUENCE STRATIGRAPHY OF A NEARSHORE, MIXED CARBONATE-SILICICLASTIC SYSTEM OF MIDDLE/UPPER CAMBRIAN OF SOUTHEASTERN ARIZONA

2017 ◽  
Author(s):  
Marcelina Labaj ◽  
◽  
Brian R. Pratt
Facies ◽  
2014 ◽  
Vol 60 (4) ◽  
pp. 987-1012 ◽  
Author(s):  
Jesse R. Carlucci ◽  
Stephen R. Westrop ◽  
Carlton E. Brett ◽  
Roger Burkhalter

2021 ◽  
Author(s):  
Olga I. Shelukhina ◽  
Mohamed A. K. El‐Ghali ◽  
Iftikhar Ahmed Abbasi ◽  
Junaid Ahmed Khan ◽  
Mohamed Kh. Khalifa ◽  
...  

2016 ◽  
Vol 9 (8) ◽  
Author(s):  
Jianhua Zhao ◽  
Changsong Lin ◽  
Jingyan Liu ◽  
Haijun Yang ◽  
Zhenzhong Cai

2017 ◽  
Vol 54 (5) ◽  
pp. 550-585 ◽  
Author(s):  
David G. Lowe ◽  
R.W.C. Arnott ◽  
Godfrey S. Nowlan ◽  
A.D. McCracken

The Potsdam Group is a Cambrian to Lower Ordovician siliciclastic unit that crops out along the southeastern margins of the Ottawa graben. From its base upward, the Potsdam consists of the Ausable, Hannawa Falls, and Keeseville formations. In addition, the Potsdam is subdivided into three allounits: allounit 1 comprises the Ausable and Hannawa Falls, and allounits 2 and 3, respectively, the lower and upper parts of the Keeseville. Allounit 1 records Early to Middle Cambrian syn-rift arkosic fluvial sedimentation (Ausable Formation) with interfingering mudstone, arkose, and dolostone of the marine Altona Member recording transgression of the easternmost part of the Ottawa graben. Rift sedimentation was followed by a Middle Cambrian climate change resulting in local quartzose aeolian sedimentation (Hannawa Falls Formation). Allounit 1 sedimentation termination coincided with latest(?) Middle Cambrian tectonic reactivation of parts of the Ottawa graben. Allounit 2 (lower Keeseville) records mainly Upper Cambrian quartzose fluvial sedimentation, with transgression of the northern Ottawa graben resulting in deposition of mixed carbonate–siliciclastic strata of the marine Rivière Aux Outardes Member. Sedimentation was then terminated by an earliest Ordovician regression and unconformity development. Allounit 3 (upper Keeseville) records diachronous transgression across the Ottawa graben that by the Arenigian culminated in mixed carbonate–siliciclastic, shallow marine sedimentation (Theresa Formation). The contact separating the Potsdam Group and Theresa Formation is conformable, except locally in parts of the northern Ottawa graben where the presence of localized islands and (or) coastal salients resulted in subaerial exposure and erosion of the uppermost Potsdam strata, and accordingly unconformity development.


Geosciences ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 239
Author(s):  
Łukasz Słonka ◽  
Piotr Krzywiec

The presented study is devoted to the subsurface Upper Jurassic carbonate buildups and surrounding stratified inter-buildup deposits in the hitherto less recognized area, in comparison with other parts of the northern Tethyan shelf in Poland and Europe. The study area is located within the present-day Miechów Trough, almost entirely covered by thick Cretaceous and younger deposits. This paper shows results of the interpretation of 2D seismic data, calibrated by data from deep wells. Investigation of various elements of the Upper Jurassic carbonate depositional system in the Miechów Trough is supported by seismic facies and attribute analysis. The four distinctive seismic facies—(A) bedded, (B) mound-shaped, (C) contorted-chaotic, and (D) chaotic—were assigned to the main Upper Jurassic sedimentary facies, represented by (1) bedded facies, (2) massive facies (carbonate buildups) and (3) deposits of gravity mass-flows. The results of this study were used to construct a depositional model for the Upper Jurassic succession, that focuses on the initiation, growth and demise of the large carbonate buildups in this part of the basin. This paper also presents the more extensive distribution of the Upper Jurassic carbonate buildups than was previously proposed for the Miechów Trough.


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