Results 81 to 90 of about 2,716 (159)

Hybrid Neural Networks for Frequency Estimation of Unevenly Sampled Data [PDF]

, 1999
In this paper we present a hybrid system composed by a neural network based estimator system and genetic algorithms. It uses an unsupervised Hebbian nonlinear neural algorithm to extract the principal components which, in turn, are used by the MUSIC ...
Barone, F., Ciaramella, A., Milano, L., Tagliaferri, R.   +3 more
core   +3 more sources

Astrochronology for the Messinian Sorbas basin (SE Spain) and orbital (precessional) forcing for evaporite cyclicity [PDF]

, 1998
The Sorbas basin of SE Spain contains one of the most complete sedimentary successions of the Mediterranean reflecting the increasing salinity during the Messinian salinity crisis.
Fortuin, A.R., Hilgen, F.J., Krijgsman, W., Sierro, F.J.   +3 more
core   +1 more source

New insights on the Sorbas Basin (SE Spain): the onshore reference of the Messinian Salinity Crisis [PDF]

, 2015
International audienceThe Sorbas Basin is the land reference of the Messinian Salinity Crisis (MSC) that affected the Mediterranean Sea in the latest Miocene. Its stratigraphy has been re-visited using calcareous nannofossils and planktonic foraminifers,
Bache, François, Bellas, Spyridon M., Clauzon, Georges, Do Couto, Damien, Doménech, Rosa, Estrada, Ferran, Gorini, Christian, Gumiaux, Charles, Jolivet, Laurent, Jouannic, Gwénaël, Lebret, Noëmie, Martinell, Jordi, Melinte-Dobrinescu, Mihaela Carmen, Mocochain, Ludovic, Popescu, Speranta-Maria, Quillévéré, Frédéric, Rabineau, Marina, Rubino, Jean-Loup, Suc, Jean-Pierre, Warny, Sophie   +19 more
core   +5 more sources

Astronomical Chronology Framework of the Lingshui Formation (Oligocene) in the Northern South China Sea

Journal of Marine Science and Engineering
This study has determined the period of sedimentation of the Lingshui Formation as the Oligocene (Rupelian-Chattian) through biostratigraphic data, including planktonic foraminifera zonation.
Jianhao Liang, Yaning Wang, Shangfeng Zhang, Yubing Liang, Gaoyang Gong, Rui Han   +5 more
doaj   +1 more source

Lateral facies variations in the Triassic Dachstein platform: A challenge for cyclostratigraphy

The Depositional Record, 2019
The Triassic Dachstein platform limestone at Steinernes Meer, Salzburg, Austria, includes 611 m of limestone with 222 peritidal cycles overlain by 273 m of subtidal, non‐cyclic and weakly cyclic limestone.
Elias Samankassou, Paul Enos
doaj   +1 more source

Lithological and biostratigraphic characteristics of the Upper Silurian and Lower Devonian deposits of the southwestern part of the field named after Roman Trebs

Georesursy, 2018
A conodont sequence from the Przhidolian stage of the Upper Silurian and almost the entire Lokhkovian stage of the Lower Devonian has been established in the sections of the Upper Silurian-Lower Devonian on the southwestern part of the field named after ...
Т.М. Mavrinskaya, E.N. Savelyeva, K.D. Shumatbaev   +2 more
doaj   +1 more source

Astronomical Orbital Cycle-Driven Coevolution of Paleoclimate and Sea Level with Sedimentary Response: A Case Study from the Upper Member of the Miocene Zhujiang Formation in the Enping Depression, South China Sea

Applied Sciences
This study focuses on the upper section of the Zhujiang Formation in the Enping Sag of the Zhujiangkou Basin in the South China Sea, investigating the mechanisms by which astronomical orbital cycles drive paleoclimate, sea-level fluctuations, and ...
Shangfeng Zhang, Chenjun Zeng, Enze Xu, Yaning Wang, Rui Zhu, Rui Han, Gaoyang Gong   +6 more
doaj   +1 more source

The orbital record in stratigraphy [PDF]

Orbital signals are being discovered in pre-Pleistocene sediments. Due to their hierarchical nature these cycle patterns are complex, and the imprecision of geochronology generally makes the assignment of stratigraphic cycles to specific orbital cycles ...
Fischer, Alfred G.
core   +1 more source

Astronomical calibration of the geological timescale: closing the middle Eocene gap

, 2015
To explore cause and consequences of past climate change, very accurate age models such as those provided by the astronomical timescale (ATS) are needed.
Bohaty, S.M., Frederichs, T., Röhl, U., Westerhold, T., Zachos, J.C.   +4 more
core   +2 more sources

The distribution of the ammonite Gravesia (Salfeld, 1913) in the Kimmeridge Clay Formation (Late Jurassic) in Britain [PDF]

, 2010
Species of the ammonite Gravesia (Salfeld, 1913) have a widespread distribution in Europe over a relatively narrow stratigraphical range in the late Kimmeridgian and early Tithonian stages.
Etches, S.M., Gallois, R.W.
core