Preprints

Filtering by Subject: Stratigraphy

How to drain a megalake: Comments on a study by Palcu et al. (2021) Scientific Reports 11, Art. Nr.: 11471.

Michal Šujan, Natália Hudáčková, Imre Magyar

Published: 2022-05-27
Subjects: Earth Sciences, Geology, Oceanography, Paleobiology, Paleontology, Sedimentology, Stratigraphy, Tectonics and Structure

In a recent paper by Palcu et al. (2021: Scientific Reports 11, Art. Nr.: 11471), the Cape Panagia section on the Taman peninsula (Russian Black Sea) was dated using magnetostratigraphy, in order to calibrate the timing of previously published regressions of the Paratethys megalake. The authors of the paper claim that this “largest megalake in the geological record” experienced four major [...]

Salt-detached strike-slip faulting, Outer Kwanza Basin, Offshore Angola

Aurio Erdi, Christopher Aiden-Lee Jackson

Published: 2022-05-25
Subjects: Geology, Geophysics and Seismology, Stratigraphy, Tectonics and Structure

We here use a 3D seismic reflection dataset from Outer Kwanza Basin, offshore Angola to examine the structure and growth of salt-detached strike-slip faults. The faults occur in four, up to 13.8 km-long, NE-trending arrays that are physically linked by restraining bend and releasing stepovers, and which presently overlie Aptian salt and base-salt relief related to pre-salt faulting. We suggest [...]

A very unconventional hydrocarbon play: the Mesoproterozoic Velkerri Formation of Northern Australia

Grant Cox, Alan S. Collins, Amber J.M. Jarrett, et al.

Published: 2022-05-16
Subjects: Geochemistry, Geology, Sedimentology, Stratigraphy, Tectonics and Structure

The ca. 1.5–1.3 Ga Roper Group of the greater McArthur Basin is a component of one of the most extensive Precambrian hydrocarbon-bearing basins preserved in the geological record, recently assessed as containing 429 million barrels of oil and eight trillion cubic feet of gas (in place). It was deposited in an intra-cratonic sea, referred to here as the McArthur-Yanliao Gulf. The Velkerri [...]

Late Glacial and Holocene Palaeolake History of the Última Esperanza Region of Southern Patagonia

Stephen J Roberts, Robert D McCulloch, Joseph F Emmings, et al.

Published: 2022-03-29
Subjects: Earth Sciences, Geochemistry, Geology, Geomorphology, Glaciology, Hydrology, Paleobiology, Physical Sciences and Mathematics, Sedimentology, Stratigraphy, Volcanology

We undertook multiproxy analyses on two sediment cores from Lago Pato, a small lake basin at 51°S topographically separated from Lago del Toro in Torres del Paine (TdP), to provide insights into glacier dynamics and lake level change in the TdP and Última Esperanza region over the last ~30,000 cal a BP (30 ka). Lago Pato is situated in a region overridden by the Southern Patagonian Icefield [...]

Detrital zircon record of the Sturtian glaciation: Adelaide Superbasin

Jarred Cain Lloyd, Wolfgang V Preiss, Alan S. Collins, et al.

Published: 2022-03-24
Subjects: Earth Sciences, Geochemistry, Geology, Sedimentology, Stratigraphy

The glaciogenic nature of the Yudnamutana Subgroup was first recognised over a century ago, and their global significance was recognised shortly after, eventually culminating with the pan global Sturtian glaciation and Snowball Earth theory. Much debate on the origin and timing of these rocks, locally and globally, has ensued in the years since. A significant corpus of research on the lithology, [...]

Late Tonian development and provenance of the Adelaide Superbasin

Jarred Cain Lloyd, Alan S. Collins, Morgan L. Blades, et al.

Published: 2022-03-22
Subjects: Earth Sciences, Geochemistry, Geology, Sedimentology, Stratigraphy, Tectonics and Structure

The late Tonian sequences of the Adelaide Superbasin were witness to the birth of the proto-Pacific Ocean during the breakup of Rodinia. Understanding the sedimentology and provenance of these rocks from across the basin is key to understanding both their deposition over ~70 million years, the local palaeogeography, and leads to a better understanding of the early development of the proto-Pacific [...]

Inverting passive margin stratigraphy for marine sediment transport dynamics over geologic time

Charles Merritt Shobe, Jean Braun, XIAOPING YUAN, et al.

Published: 2022-03-09
Subjects: Geology, Geomorphology, Sedimentology, Stratigraphy

Passive margin stratigraphy contains time-integrated records of landscapes that have long since vanished. Quantitatively reading the stratigraphic record using coupled landscape evolution and stratigraphic forward models (SFMs) is a promising approach to extracting information about landscape history. However, the most commonly used SFM, which is based on an approximation of local, linear [...]

Early evolution of the Adelaide Superbasin

Jarred Cain Lloyd, Alan S. Collins, Morgan L. Blades, et al.

Published: 2022-02-17
Subjects: Earth Sciences, Geochemistry, Geology, Sedimentology, Stratigraphy, Tectonics and Structure

Continental rifts have a significant role in supercontinent breakup, and the development of sedimentary basins. The Australian Adelaide Superbasin is one of the largest and best-preserved rift systems that initiated during the breakup of Rodinia, yet substantial challenges still hinder our understanding of its early evolution and place within the Rodinian supercontinent. In the past decade, our [...]

A one-million-year isotope record from siderites formed in modern ferruginous sediments

Aurèle Vuillemin, Christoph Mayr, Jan A. Schuessler, et al.

Published: 2022-02-17
Subjects: Biogeochemistry, Other Environmental Sciences, Sedimentology, Stratigraphy

Ancient iron formations hold important records of environmental conditions during the Precambrian Eons. Reconstructions of past oceanic systems require investigating modern ferruginous analogs to disentangle water column and diagenetic signals recorded in iron-bearing minerals. We analyzed oxygen, iron, and carbon isotopes in siderite, a ferrous carbonate phase commonly used as an environmental [...]

Macrostratigraphy of the Ediacaran System in North America

Daniel Christian Segessenman, Shanan E Peters

Published: 2022-02-11
Subjects: Earth Sciences, Geochemistry, Geology, Paleontology, Sedimentology, Stratigraphy, Tectonics and Structure

Ediacaran sediments record the termination of Cryogenian ‘Snowball Earth’ glaciations, preserve the first occurrences of macroscopic metazoans, and contain one of the largest known negative δ13C excursions (the Shuram-Wonoka). The rock record for the transition between the Proterozoic and Phanerozoic in North America is also physically distinct, with much of the continent characterized by a wide [...]

Seismic Geomorphology of a Late Cretaceous Turbidite Channel system in Deepwater Kribi/Campo sub-basin, offshore Cameroon

Boris SECKE BEKONGA GOUOTT, YEM MBIDA, Joseph Quentin YENE ATANGANA, et al.

Published: 2022-01-28
Subjects: Earth Sciences, Geology, Geomorphology, Geophysics and Seismology, Physical Sciences and Mathematics, Sedimentology, Stratigraphy

In this study, a seismic reflection dataset and well-log data were integrated to investigate the geometry and internal configuration of a turbidite channel system within the Late Cretaceous interval of the deep-water Kribi-Campo sub-basin, offshore Cameroon. This interval is characterized by a well-developed submarine channel system consisting of an early and a late-stage channel. [...]

Quaternary E-W extension uplifts Kythira Island and segments the Hellenic Arc

Gino de Gelder, David Fernández-Blanco, Nazik Ögretmen, et al.

Published: 2022-01-25
Subjects: Geology, Geomorphology, Paleontology, Sedimentology, Stratigraphy, Tectonics and Structure

Several crustal and lithospheric mechanisms lead to deformation and vertical motion of the upper plate during subduction, but their relative contribution is often enigmatic. The Hellenic Forearc has been uplifting since Plio-Quaternary times, yet the spatiotemporal characteristics and sources of this uplift are poorly resolved. The remarkable geology and geomorphology of Kythira Island, in the [...]

Phanerozoic sedimentary cover history of the Hudson Platform: a heuristic modeling perspective

Kalin T. McDannell, Paul B. O'Sullivan, Kerry Gallagher, et al.

Published: 2022-01-19
Subjects: Earth Sciences, Geochemistry, Geology, Geomorphology, Physical Sciences and Mathematics, Stratigraphy, Tectonics and Structure

Understanding the long-term erosion and burial history of cratons is challenging due to the incompleteness of the rock record. Low-temperature thermochronology has been applied to provide constraints on these histories and apatite fission-track dating has been one of the preferred methods for the past four decades. Thermochronological data are often inverted for a thermal history along with [...]

Calibrating the temporal and spatial dynamics of the Ediacaran - Cambrian radiation of animals

Fred Toby Bowyer, Andrey Yu Zhuravlev, Rachel Wood, et al.

Published: 2021-12-31
Subjects: Geochemistry, Geology, Paleontology, Stratigraphy

The Ediacaran-Cambrian transition, which incorporates the radiation of animals, lacks a robust global temporal and spatial framework, resulting in major uncertainty in the evolutionary dynamics of this critical radiation and its relationship to changes in palaeoenvironmental geochemistry. We first present a new δ13Ccarb composite reference curve for the Ediacaran Nama Group of southern Namibia, [...]

Structural traps and seals for expanding CO2 storage in the northern Horda Platform, North Sea

Johnathon Lee Osmond, Mark Joseph Mulrooney, Nora Holden, et al.

Published: 2021-12-24
Subjects: Geology, Geophysics and Seismology, Oil, Gas, and Energy, Other Earth Sciences, Other Environmental Sciences, Stratigraphy, Tectonics and Structure

The maturation of geological CCS along the Norwegian Continental Shelf is ongoing in the Norwegian North Sea, however, more storage sites are needed to reach climate mitigation goals by 2050. In order to augment the Aurora site and expand CO2 storage in the northern Horda Platform, regional traps and seals must be assessed to better understand the area’s potential. Here, we leverage wellbore and [...]

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