Results 71 to 80 of about 3,019,172 (413)

Anatomy and origin of authochthonous late Pleistocene forced regression deposits, east Coromandel inner shelf, New Zealand: implications for the development and definition of the regressive systems tract [PDF]

open access: yes, 2004
High-resolution seismic reflection data from the east Coromandel coast, New Zealand, provide details of the sequence stratigraphy beneath an autochthonous, wave dominated inner shelf margin during the late Quaternary (0-140 ka). Since c.
Bard E.   +50 more
core   +2 more sources

Dating glacier ice of the last millennium by quantum technology [PDF]

open access: yes, 2018
Radiometric dating with 39Ar covers a unique timespan and offers key advances in interpreting environmental archives of the last millennium. Although this tracer has been acknowledged for decades, studies so far have been limited by the low abundance and radioactivity, thus requiring huge sample sizes.
arxiv   +1 more source

Sequence stratigraphy in Proterozoic successions

open access: yesGeology, 1988
Sedimentological logging and facies mapping have been used to identify depositional sequences bounded by subtle but regionally persistent unconformities in rocks of Proterozoic age in the western United States, South Australia, and northwestern Canada. We conclude from these studies that the sequence stratigraphic approach is of considerable importance
Christie-Blick, Nicholas   +2 more
openaire   +3 more sources

Wetlands as environments of early human occupation: A new classification for freshwater palaeowetlands

open access: yesThe Depositional Record, EarlyView.
A new classification for inland freshwater palaeowetlands to be used in the field or core laboratory by sedimentologists, providing examples from the Guadix Basin (southern Spain). Abstract Present wetlands have proven to be delicate, biodiverse ecosystems, that are natural sinks for CO2 and act as good indicators for climate changes.
S. Pla‐Pueyo   +1 more
wiley   +1 more source

The SPICE carbon isotope excursion in Siberia: a combined study of the upper Middle Cambrian-lowermost Ordovician Kulyumbe River section, northwestern Siberian Platform [PDF]

open access: yes, 2008
An integrated, high-resolution chemostratigraphic (C, O and Sr isotopes) and magnetostratigraphic study through the upper Middle Cambrian–lowermost Ordovician shallowmarine carbonates of the northwestern margin of the Siberian Platform is reported. The
Bengtson, S   +9 more
core   +3 more sources

Seismic interpretation and sequence stratigraphic analysis of the Bahariya Formation in the South Umbaraka oilfields (Western Desert, Egypt): insights into reservoir distribution, architecture, and evaluation

open access: yesGeomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023
The integration of multiscale datasets, including seismic, well-logs and stratigraphy, is providing a precise picture about reservoir evaluation and spatial distribution.
Amer A. Shehata   +3 more
doaj   +1 more source

Modern and ancient tidal sedimentary systems in the era of energy transition: Introduction to the special volume of The Depositional Record

open access: yesThe Depositional Record, EarlyView.
This volume examines tidal sedimentary systems through 11 articles, spanning ancient and modern tidalites, technological advances and implications for human management. Highlighting contributions from Tidalites 2022 and beyond, it underscores tidalites' significance in sedimentology, environmental forecasting and energy transition, reflecting decades ...
Sergio G. Longhitano   +2 more
wiley   +1 more source

Remote Stratigraphic Analysis: Combined TM and AIS Results in the Wind River/bighorn Basin Area, Wyoming [PDF]

open access: yes, 1985
An in-progress study demonstrates the utility of airborne imaging spectrometer (AIS) data for unraveling the stratigraphic evolution of a North American, western interior foreland basin.
Adams, S., Lang, H. R., Paylor, E. D.
core   +1 more source

Bayesian classification for dating archaeological sites via projectile points [PDF]

open access: yesarXiv, 2020
Dating is a key element for archaeologists. We propose a Bayesian approach to provide chronology to sites that have neither radiocarbon dating nor clear stratigraphy and whose only information comes from lithic arrowheads. This classifier is based on the Dirichlet-multinomial inferential process and posterior predictive distributions.
arxiv  

Evolution of major sedimentary mounds on Mars [PDF]

open access: yesJournal of Geophysical Research - Planets, 121, 2282, 2017
We present a new database of $>$300 layer-orientations from sedimentary mounds on Mars. These layer orientations, together with draped landslides, and draping of rocks over differentially-eroded paleo-domes, indicate that for the stratigraphically-uppermost $\sim$1 km, the mounds formed by the accretion of draping strata in a mound-shape.
arxiv   +1 more source

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