Download or read book A Study of the Atoka Depositional System NW Shelf of the Arkoma Basin written by David M. Thomas and published by . This book was released on 1997 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Shelf to Basin Transition and Tectonostratigraphy of the Atoka Formation lower Pennsylvanian in the Arkoma Basin Northwest Arkansas written by Travis Gibson White and published by . This book was released on 2019 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: The east-to-west oriented Arkoma Basin is a peripheral foreland basin or depositional trough that developed during the Carboniferous Period. This formation covers an aerial extent of approximately 33,800 square miles and spans from west-central Arkansas into southeastern Oklahoma (McGilvery, Manger, and Zachry, 2016; Perry, 1995). The Atoka Formation, deposited during the early Pennsylvanian, is the largest Paleozoic formation by aerial extent in the state of Arkansas and is located within and comprises the bulk of Arkoma Basin sediments (McFarland, 2004; Nance, 2018). This formation has been informally divided into three divisions, the lower, middle, and upper, based on their stratigraphic response to differing tectonic processes. A tectonostratigraphic interpretation was made for each division of the Atoka Formation using high resolution cross sections; correlated using well log, seismic, and surface data. Five condensed regional transects were constructed that aided in the development of a cross section "grid" meant to represent the deep marine to shallow marine depositional hinge lines. Each of the three Atoka divisions have a different dominant depositional force. The Lower Atoka deposition was dominated by eustasy, and with sediment supply from the start of Arkoma Basin tectonics, the middle division was dominated by tectonic subsidence and the upper was dominated by sediment supply. The transition between the Atoka divisions and the magnitude of migration between each deep marine hinge line indicates the progradation of the Upper Atoka depositional cycles occurred more rapidly than the retrogradation of the Middle Atoka. The maximum flooding of the formation occurred within the Middle Atoka's uppermost informal member, the Morris Member. The Lower Atoka was deposited on an extensive tectonically stable structural platform, which is supported by no lithostratigraphic transition to deep marine deposits within this project's study area. The deep marine deposition is characterized by shales encapsulating tumultuously distributed and isolated sandstone complexes. These sandstone complexes are not correlated to the shallow marine sandstones by anything but a condensed geologic timeline.
Download or read book Depositional Dynamics and Stratigraphic Correlation Basal Atoka Formation Spiro Foster Members Middle Pennsylvanian Arkoma Basin Eastern Oklahoma written by Zachary W. Mullen and published by . This book was released on 2009 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subsurface Stratigraphic Interpretation of the Lower Atoka Formation Northern Arkoma Basin Arkansas written by William Stephen Denham and published by . This book was released on 2018 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arkoma Basin is a Carboniferous peripheral foreland basin creating a structural depression covering an approximate area of 33,800 miles2 that extends through east-central Oklahoma and west-central Arkansas. The entire basin fill includes Pre-Mississippian carbonate shelf deposits, Mississippian marine carbonates and black shales, and Pennsylvanian mixed carbonated/clastic and shore zone/deltaic deposits. The Lower Atoka formation (Pennsylvanian) occurs in outcrop along the southern Boston Mountain Plateau in northern Arkansas and extends into the subsurface of the Arkoma Basin over an area of 2,300 miles2. The Lower Atoka ranges from 600 to 1500 feet in thickness and represents a cyclic succession of stacked shelf to shore zone/deltaic deposits recording a single 3rd order (1-10 m.y.) Vail/Exxon depositional sequence. It was deposited across a broad, tectonically stable platform along the southern margin of Laurasia just before its collision with the Gondwana and the formation of Pangea at the end of the Paleozoic. Tectonic influences meant that it was not a 100% stable platform during the Lower Atoka deposition. This affected the deposition of all the sequences in the Lower Atoka. Topographic relief on preceding deposition also helped create areas of accommodation space filled by offset, compensation bedding. Finally, subsidence on a passive margin has been argued to be up to almost 4 km. This helps explain the "long distance" shoreline shifts and cyclicity in the current time of deposition. This means that these 4th to 5th order cycles (10's to 100's k.y.) may reflect glacio eustacy and sediment supply and can be correlated across the entire area or a very large area. In addition, there appears to be a tectonic over print that influences onlap edges that define northern limits and areas of bypass and nondeposition.
Download or read book Sequence Stratigraphy and Depositional Systems of the Mansfield Sand Upper Atoka Formation Arkoma Basin Arkansas written by Scott Aubrey Cherry and published by . This book was released on 2012 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mansfield sand is an informally named member of the Pennsylvanian Atoka Formation in Arkansas. Once a productive gas reservoir, the Mansfield is situated in a double plunging anticline in the southern portion of the Arkoma Basin. The formation is internally composed of sandstone units ranging in thickness from tens of feet to over a hundred feet interbedded with shale units ranging in thickness from several tens of feet to hundreds of feet. Previous studies have focused on the stratigraphy of the lower and middle Atoka. A detailed subsurface study of the stratigraphic framework of the Mansfield sand was conducted using conventional lithostratigraphy and sequence stratigraphy. Four progradational parasequences have been identified within a highstand systems tract. Deposition of the Mansfield occurred in a deltaic environment on a sandy, fluvial or wave dominated shoreline.
Download or read book Structural and Stratigraphic Transition from the Arkoma Shelf Into the Arkoma Basin During Basin Subsidence Arkoma Basin Northwest Arkansas written by Elizabeth Whitney Studebaker and published by . This book was released on 2014 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arkoma basin is an arcuate Paleozoic structural feature in the Ouachita foreland that extends from central Arkansas and westward into southeastern Oklahoma. The Arkoma shelf lies immediately north of the basin and is comprised of Cambrian to Pennsylvanian age sedimentary rocks. In northwestern Arkansas, the stratigraphic and structural transition from the shelf into the northern portion of the Arkoma basin is poorly defined. Wireline logs were used to construct a series of three north to south cross sections, as well as two along-strike west to east cross sections to examine Morrowan and lower Atokan age strata. In addition to cross sections, isopach and structural contour maps were constructed from wireline log correlation. North to south cross sections display thickening to the south, particularly with sandstone and shale units. West to east cross sections exhibit thickening to the east due to proximity to an eastern terrigenous sediment source. Morrow and lower Atoka strata document the initiation of Arkoma basin subsidence during early Pennsylvanian time and reflect an eastern source of terrigenous sediment to the Arkoma shelf.
Download or read book DEPOSITIONAL SYSTEMS IN THE ATOKA AND MORROW SERIES PENNSYLVANIAN HALEY FIELD AREA LOVING COUNTY TEXAS written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Haley Field, Loving County, Texas has produced over 300 bcf of gas from Morrowan and Atokan strata in the Delaware Basin. However, only one in four wells drilled in the field is economic. These reservoirs were deposited in a deep-water setting in a basin undergoing active tectonism in response to the Marathon-Ouachita orogeny. The Central Basin Uplift, the Grisham Anticline, and the Red Hills Arch all altered sediment distribution in the basin. Lower and middle Morrow strata are multiple-source submarine ramp turbidites that flowed from the Northwest Shelf and the Central Basin Uplift. A carbonate shelf edge developed along the Northwest Shelf during the late Morrowan and prograded basinward during the Atokan. Channels cut into the high-relief shelf edge fed sand-rich turbidites deposited on the basin plain. Exploration potential exists in stacked channels, fan lobes and overbank deposits associated with turbidites both in the Morrow and the Atoka.
Download or read book Stratigraphic and Structural Analysis of Middle Atoka Formation in Aetna Gas Field Franklin Johnson and Logan Counties Arkansas written by Ikramuddin Bahram and published by . This book was released on 2015 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arkoma basin is a prolific natural gas basin. The defining feature of this basin is the Atoka Formation that was deposited in the early-middle Pennsylvanian. The Atoka is held equivalent to the tectonic and structural evolution of the basin. This study focuses on one of the many gas fields in the Arkoma Basin in Arkansas to assess the stratigraphic and structural evolution that the strata in this particular field display. Aetna Gas Field extends from T. 8N. R. 27 W to T. 9 N, R. 27 W and T. 8 N, R. 26 W to 8N, R. 27. Geographically, Aetna field covers parts of Franklin, Johnson and Logan counties. It is one of the pioneer gas fields in the Arkoma Basin. First discovery of gas in Aetna Field was made in March 1928. The first three producing wells were completed in the upper Carpenter and middle Alma sands of the middle Atoka Formation. An analysis of structures and stratigraphy of the gas field through well log correlations reveal a combination trap for the gas. Using IHS Petra, stratigraphic correlations were performed on 49 wells in 10 cross sections. The wells selected were sorted by several criteria. Gamma ray logs were given priority. Stratigraphic tops were determined for correlation purposes. The stratigraphic tops were picked and correlated. The middle Atoka Formation was addressed exclusively for the purpose of this study. Structural analysis indicates an arch-and-trough setting that led to gas accumulation in this field. The stratigraphic analysis confirms a thickening to the south following the general southern thickening trend of Atoka Formation in the Arkoma Basin.
Download or read book Petroleum Abstracts Literature and Patents written by and published by . This book was released on 1989 with total page 1528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Paleocurrent Study of Upper Mississippian and Lower Pennsylvanian Rocks of the Ouachita Mountains and Arkoma Basin Southeastern Oklahoma written by Garrett Briggs and published by . This book was released on 1963 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Regional Stratigraphy of North America written by W.J. Frazier and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: An early reviewer of this book stated that he had difficulty assessing its marketability because it "falls between the cracks" of geological literature. We have designed this book to meet a need of modem geology: namely, a single source providing both detailed and synoptic stratigraphy of the various regions of North America, through geological time. Shortly after beginning work on such a book, we realized why it had not yet been written: it required six years of effort, assimilation of an incredible amount of information, and two years' additional work to cut the volume down to publishable size. Further, by the time the final chapter was written, the fIrst few were already out of date. Nevertheless, the book lies in front of you. It is intended to serve several purposes. As a textbook, it will serve the following courses: • Regional stratigraphy • Sedimentary tectonics • Regional tectonics • Advanced historical geology • Survey-level paleontology Obviously, not all portions of the book are relevant to all of the above courses. We assume the reader will retain this book after the particular course is done, and will use it as a reference book. Hopefully, others will obtain the book solely for reference purposes. We believe it will be especially useful for the working geologist or academic geologist seeking generalized and some moderately detailed information about a region or geological time interval which is unfamiliar.
Download or read book Proceedings of the Arkansas Academy of Science written by Arkansas Academy of Science and published by . This book was released on 1976 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure and Stratigraphy of a Complex Anticlinal Feature Backbone Anticline Arkoma Basin Arkansas written by Shailyn Marie Abbott and published by . This book was released on 2014 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arkoma Basin of Arkansas and Oklahoma formed in the Ouachita foreland during the late Mississippian and Pennsylvanian periods (about 290- to 330 million years ago). The basin developed in response to convergent tectonic boundaries that closed obliquely from west to east associated with Ouachita orogenic event. The Backbone anticline in the northern Arkoma Basin is a prominent product of this convergence, and represents the first major component of this study. The structure is asymmetric with beds on the southern limb dipping steeply to the south. It is also expressed topographically as a prominent ridge that trends eastward from the Oklahoma-Arkansas border approximately 30 miles. The ridge is bounded on the northern side by a steeply dipping normal fault with most of the sedimentary exposure occupying a position on the southern hanging wall of the structure. Strata involved in the structure are sandstone and shale units from the middle and upper part of the Atoka Formation. A recent road cut in southern Sebastian County, Arkansas exposes a complete and continuous section of more than 600 feet in thickness through an upper Atoka sandstone unit along the Backbone anticline. A subsurface stratigraphic study of the middle of the Backbone anticline was also conducted. Several normal and some reverse faults were noted from cross-sections of the subsurface using IHS PETRARTM software program. The upper 5400 feet of the Atoka Formation includes intervals from the middle and upper part of the formation. This interval extending from the Casey Sand to the Upper Alma Formation was examined by means of three cross-sections prepared from wire line logs to determine the role of faulting in the sedimentary section
Download or read book Seismic Facies and Sedimentary Processes of Submarine Fans and Turbidite Systems written by Paul Weimer and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Frontiers in Sedimentary Geology series was established for the student, the researcher, and the applied scientist to enhance their potential to stay abreast of the most recent ideas and developments and to become familiar with certain topics in the field of sedimentary geology. This series deals with subjects that are in the forefront of both scientific and economic interests. The treatment of a subject in an individual volume, therefore, should be a combina tion of topical, regional, and interdisciplinary approaches. The interdisciplinary aspects are becoming more and more important because most studies dealing with the natural sciences cannot effectively stand alone. Although this thrust may sound simple, in reality it is not, basi cally because each discipline has developed its own jargon and definitions ofterms. Communi cation among disciplines is a major issue and can be accomplished more constructively when people with different backgrounds join together at the same symposium and can read from the same volume rather than confining themselves within the world of their own specialty meetings and journals. Books in this series provide this connective link between disciplines. Each book in this series provides a continuous and connected flow of concepts throughout the volume by the use of introductory chapters that outline a topic to help the reader grasp its problems and to understand the contributions that follow.
Download or read book Depositional History of the Hartshorne Formation Arkoma Basin East central Oklahoma written by Albert P. Matteo and published by . This book was released on 1981 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Depositional Element Morphology and Architecture of the Atoka Interval Fort Worth Basin TX U S A written by Vishal Timal Maharaj and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Atoka Group (Lower-Middle Pennsylvanian) of the Fort Worth Basin (FWB) forms a significant (~2-3 Tcf), and as yet underexploited, domestic gas resource that is often seen as a secondary target as operators make their way to the deeper Barnett Shale. Although thousands of wells penetrate the Atoka in the FWB, the origin and character of this unit are still debated. The influence of deeper Ellenburger karsting on depositional morphology and element character has also been insufficiently addressed. Current depositional model interpretations vary from wave-dominated, to river-dominated, to fan deltas, comprising various braided, meandering, and mixed-load stream systems. An understanding of the facies in the Atoka and their spatial distribution can be enhanced by utilizing the most effective tool in describing each level of resolution (seismic/low, well log/medium, core/high) and producing methods of correlation that accurately define the geometries that exist. A 3-D survey covering 68 km2 of the FWB has been integrated with data from 226 wells and core from 3 wells for detailed mapping of the Atoka. In seismic, the Atoka is represented by a ~200-ms interval showing geometric relationships of lapout (onlap, offlap, toplap, downlap, and truncation), which suggest the existence of imageable geomorphic features. Both seismic and well log mapping show that the Atoka can be subdivided into 12 parasequences that stack to form: (a) a lower, regressive; (b) a middle, transgressive; and (c) an upper, highstand parasequence set. Core analysis reveals that eight main facies exist in the Atoka, which suggest the interval comprises a series of coarse-grained, fluvio-deltaic and shallow marine deposits. Criteria are outlined for defining channel dimensions using point bar measurements from well logs, and a detailed quantitative analysis of the variability of these dimensions in cross-section and plan-view was undertaken. Point-bar analyses indicate that channel widths range from 34 to 456 m, given the variability in both local and regional accommodation space created during deposition. A review and comparison of modern and ancient analogs to Atoka sediments support the interpretation of a river-dominated delta system. The argument is reinforced by observations from facies components identified in core, gamma-ray-log expressions, and the distant location of the study relative to highland sources. Previous fan- and wave-dominated delta interpretations are therefore discounted and do not apply to the study area
