Heavy-Mineral Segregation in Springer Sandstones in Anadarko and Ardmore Basins, Oklahoma: GEOLOGICAL NOTES

David B. Duane

AAPG Bulletin

.... In most places the sandstones exhibit a steep dip and form small hogbacks. In the subsurface the sands have been studied from wells in Grady...

Ozark Precambrian-Paleozoic Relations: Discussion of Igneous Rocks Exposed in Eastern Kansas: REPLY TO WILLIAM C. HAYES AND PAUL E. GERDEMANN

Harry E. Wheeler

AAPG Bulletin

... of that structure, to a depth of at least 500 feet would also be about 50°--an excessive steep dip for normally folded structures in this region. A possible...

Stop Treating Diffractions as Noise … Use them for Imaging of Fractures and Karst; #120057 (2012)

Mark Grasmueck, Tijmen Jan Moser, and Michael A. Pelissier

Search and Discovery.com

... compared to fractures and complex shapes with abundant small curvatures. Vertically Stacked Diffractions are Dip Indicators of Steep Fractures While...

The Keys to New Sub-Igneous Oilfield Discovery in Offshore Bohai Bay Basin, China; #10945 (2017)

Haifeng Yang, Lei Chen, Changgui Xu, Chengmin Niu, Bo Yang

Search and Discovery.com

... Huanghekou sag is located in the south of Bohai Bay Basin and is a half-graben with steep dip angle in the north limb and gentle in the south developed...

Dip Sequence Analysis Utilizing Statistical Curvature Analysis: A Case Study on Complex Strata of the Late Middle Miocene Formation in Akita Basin, Onshore Japan, #42346 (2019).

Sarvagya Parashar, Ivan Zhia Ming Wu, Saki Shimada, Hideo Komatsu, M.S Iyer, Lee Chung Yee,

Search and Discovery.com

... to the steep dips zone. The transverse dip component exhibits the distinctive negative cusp pattern. The dips exhibit the downward increase in magnitude...

The occurrence of vertebrate and invertebrate fossils in a sequence stratigraphic context: the Jurassic Sundance Formation, Bighorn Basin, Wyoming, U.S.A.

Sharon K. McMullen, Steven M. Holland, F. Robin O'Keefe

PALAIOS

... association (most often T2 or T3), or in some cases, presumed Morrison Formation, although such contacts are usually poorly exposed on steep dip slopes. Rare...

A new eurypterid Lagerstätte from the upper Silurian of Pennsylvania

Matthew B. Vrazo, Jeffrey M. Trop, Carlton E. Brett

PALAIOS

... due to the steep dip-slope of the outcrop and limited exposure of stratigraphic intervals at any one point along strike. Repeated collecting trips...

The role of salt diapirism in controlling the stratigraphic architecture and distribution of deep-water deposits, Pierce Field, East Central Graben, North Sea

Clara Abu, Christopher A.-L. Jackson, Malcolm Francis

Journal of Sedimentary Research (SEPM)

... the growing diapir, while the second, conjugate set may have developed later when the strata had been rotated to a subvertical or steep dip (Rowan et al...

Structural Interpretation of the Northern Canning Basin, Western Australia

Y. Zhan, A. J. Mory

Petroleum Exploration Society of Australia (PESA)

..., but the lack of rollover in the hanging-wall (Fig. 5a) implies it is planar, and the steep dip implies a possible oblique component of movement. Fault B can...

Reynosa Problem of South Texas, and Origin of Caliche

W. Armstrong Price

AAPG Bulletin

... of End_Page 493------------------------------ some of the overlapped formations, largely the Lagarto, and derived by applying too steep a dip...

Developments in Southeastern States in 1945

C. W. Alexander

AAPG Bulletin

.... Below that point very few definite correlations are possible due to similar conditions of faulting and steep dip which were mentioned as occurring...

Chapter 18: The Structure of an Inverted Back-arc Rift: Insights from a Transect across the Eastern Cordillera of Colombia near Bogota

Antonio Teixell, Juan-Camilo Ruiz, Eliseo Teson, Andres Mora

AAPG Special Volumes

...). Normal faults were not reactivated probably because of their steep dip and were bypassed by structures as the Cambao thrust. Folds under the MMVB...

Frontier Formation, Southwest Powder River Basin, Wyoming

Donald Towse

AAPG Bulletin

...; the overlying shales generally form flat country with a few rounded hills and considerable soil cover. Methods of study: Fifteen full sections...

Cenozoic Structure and Tectonic Evolution of the Kuqa Fold Belt, Southern Tianshan, China

Xin Wang, John Suppe Shuwei Guan, Aurelia Hubert-Ferrari, Ramon Gonzalez-Mieres Chengzao Jia

AAPG Special Volumes

... of the anticline is narrow and steep, with a dip of 70 to 80, developing several breaking thrusts in it, with horizontal strata on its crest...

Ordovician Chazy Group in Southern Quebec

H. J. Hofmann

AAPG Bulletin

... or exhibit a gradational contact (Fig. 5). The flanking beds have a comparatively steep dip (up to 15°) close to the bioherm and are more gently dipping 10...

Chapter 7: Upper Cretaceous Stratigraphy and Tectonic History of the Ridgway Area, Northwestern San Juan Mountains, Colorado

Paul C. Weimer

Rocky Mountain Association of Geologists

... Formation can be seen. The steep dip of the Cutler Formation is due to drape folding over the recurrently moving basement faults bordering...

The Relative Ages of Major and Minor Folding and Oil Accumulation in Wyoming

Max W. Ball

AAPG Bulletin

... and a steep dip toward the basin. We may call this the "exceptional type." Excellent examples, respectively, of the "common type" and "exceptional type...

Oil and Gas in the Texas Panhandle

Wallace E. Pratt

AAPG Bulletin

... at Amarillo? WALLACE E. PRATT: The extremely steep dip in the sub-surface beds on the south side of John Wray dome, which is as much as 1,500 feet in 2...

Pliocene

New Orleans Geological Society

... may be related to tectonic processes during Citronelle upland uplift. The unusually steep dip (25-30 deg.SW) of a thick Citronelle interval...

Structures of the Howell Creek Area

P. B. Jones

CSPG Bulletin

... normal or reverse fault, a steep dip is suggested by the relatively straight surface trace over irregular topography. This is particularly apparent when...

Relation of Accumulation to Structure in Northwestern Colorado

Ross L. Heaton

AAPG Special Volumes

... feet with the steep dip on the southwest, as steep as 30°. The structure is encircled by an escarpment of Morapos sandstone, which occurs at a horizon...

Banded Calcite Mudstone in the Lower Carboniferous "Reef" Knolls of the Dublin Basin, Ireland

M. E. Philcox

Journal of Sedimentary Research (SEPM)

... infilled with banded calcite mudstone. The dip of the banding itself is usually in the same direction as the crevices but is less steep (fig. 3...

Lessons Learned from the Exploration of Naturally Fractured Basement Reservoir, A Case Study in Indonesia

Yudha Risnandar Sinulingga, Faisal Siddiq, Arii Ardjuna, Sumaryana, Budi R. Permana

Indonesian Petroleum Association

... a relatively NE-SW strike, while minor faults have a relatively NW-SE strike. Both types exhibit steep dip angles corresponding to the pull-apart...

Leaching of Heavy Minerals Above and Below the Mid-Cretaceous Unconformity in the Ohuriawa Gorge Area of the Waipara River, North Canterbury, New Zealand

David Smale

Journal of Sedimentary Research (SEPM)

... obvious geological difference between the ends of the gorge is the steep dip of the beds at the upstream end. However, because leaching took place...

AAPG Studies in Geology No.53 - Part 2: Case Studies

edited by John H. Shaw, Christopher D. Connors and John Suppe

AAPG Special Volumes

... suggest that the front limb of the structure has a very steep dip, ranging from 30 to 85°. The Sequatchie anticline is interpreted to be a low...