Results 41 to 50 of about 1,800 (206)

Palaeoecological features of Lower Asselian (Lower Permian) carbonate skeletal mounds in the Pisanyi Kamen’ section (Un’ya River, Northern Urals)

The Depositional Record, Volume 7, Issue 2, Page 311-332, June 2021., 2021
The Pisanyi Kamen’ section on the Un'ya River, Northern Urals, from the Lower Asselian stratigraphic interval is the central part of a succession of skeletal mounds that are composed of biocementstones. Palaeoecological analysis allows the pioneer stages of the ecological succession, representing the stabilisation and colonisation stages, to be ...
Evgeniy S. Ponomarenko
wiley   +1 more source

Brazil: Modernity and Mobility [PDF]

, 2015
This essay examines the field of Brazilian mobility studies, concentrating mainly on recent (2010-2013) scholarship by Portuguese-speaking Brazilian academics published in English-language journals. The mass demonstrations and violent protests that have
Cooper, Martin
core   +1 more source

Ostracods from Upper Ordovician (Katian) carbonate lithofacies in southwest Scotland

Geological Magazine, 2010
AbstractThe Ordovician Craighead Limestone Formation of southwest Scotland was formed on a carbonate platform on the eastern tropical margin of the Laurentia palaeocontinent during the early Katian (c.456 Ma). It yields the most diverse and well-preserved ostracod fauna yet recovered from the Scottish Ordovician succession, with some 25 species ...
Mohibullah, M, Afzal, J, Williams, M, Siveter, DJ, Zalasiewicz, JA, Meidla, T   +5 more
openaire   +3 more sources

Discovery of trimerellide brachiopod Gasconsia from the Ordovician of Estonia [PDF]

Estonian Journal of Earth Sciences
In this study, the first trimerellide brachiopods from Estonia are described. They occur in the uppermost Katian (Upper Ordovician) shallow shelf environments and represent some of the largest Ordovician brachiopods.
Linda Hints, Jiayu Rong
doaj   +1 more source

Allogenic succession in Late Ordovician reefs from southeast China: a response to the Cathaysian orogeny [PDF]

Estonian Journal of Earth Sciences, 2015
Several Late Ordovician (late Katian) reef complexes are known from the border area of Jiangxi and Zhejiang provinces in southeast China. We studied two coral–stromatoporoid reefs exposed in the Xiazhen Formation at Zhuzhai (Yushan, Jiangxi).
Qijian Li, Yue Li, Wolfgang Kiessling
doaj   +1 more source

Ordovician stratigraphy of the Junee–Narromine Volcanic Belt in central New South Wales, Australia: conodont studies and regional correlations [PDF]

Estonian Journal of Earth Sciences, 2023
This contribution reviews the newly revised biostratigraphy of Middle–Upper Ordovician marine shelf successions from the Junee–Narromine Volcanic Belt in central New South Wales, based on conodont studies from four areas covering the northern ...
Yong Yi Zhen, Ian G. Percival
doaj   +1 more source

The climatic significance of Late Ordovician-early Silurian black [PDF]

, 2017
The Ordovician-Silurian transition (455-430 Ma) is characterized by repeated climatic perturbations, concomitant with major changes in the global oceanic redox state best exemplified by the periodic deposition of black shales.
A. Pohl, Adcroft, Adcroft, Algeo, Algeo, Anderson, Armstrong, Armstrong, Armstrong, Arthur, Aumont, Barton, Beaulieu, Bergman, Berner, Berner, Berry, Bickert, Brenchley, Brenchley, Brenchley, Brunetti, Bryant, Came, Chaloner, Cocks, Cocks, Cocks, Cocks, Cramer, Cramer, Cramer, D. Ferreira, Denis, Donnadieu, Dutkiewicz, Edwards, Ekman, Enderton, Falkowski, Ferreira, Ferreira, Finlay, Finnegan, Finney, Follows, Friis, Friis, G. Le Hir, Ganopolski, Garcia, Gent, Ghienne, Gille, Girard, Hammarlund, Haq, Harper, Harper, Heckman, Herrmann, Herrmann, Hoffman, Jenkyns, Jeppsson, Johnson, Jones, Kageyama, Kaljo, Kemp, Kemp, Kump, LaPorte, Large, Laskar, Le Heron, Le Heron, Le Heron, Le Heron, Le Hir, Lenton, Lenton, Litchman, Loi, Long, Loydell, Loydell, Lunt, Luo, Marshall, Marshall, Marshall, Marshall, Marshall, Martin, McKinley, Meinhold, Melchin, Molteni, Monteiro, Montenegro, Moreau, Munnecke, Myhre, Nardin, Och, Osen, Owens, Page, Palastanga, Pohl, Pohl, Pohl, Porada, Poulsen, Poussart, Prange, R Core Team, Rahmstorf, Rasmussen, Redi, Roche, Roche, Rose, Rubinstein, Ruttenberg, Sageman, Schlanger, Schmidt, Servais, Servais, Sheehan, Steemans, Stommel, Stouffer, Sutcliffe, Torsvik, Trabucho-Alexandre, Trotter, Trotter, Tukey, Van Cappellen, Vandenbroucke, Vecoli, Walker, Wallmann, Webby, Winton, Y. Donnadieu, Yamanaka, Yan, Young, Zhang, Zhou, Zhuravlev   +154 more
core   +4 more sources

An in situ shelly fauna from the lower Paleozoic Zapla diamictite of northwestern Argentina: implications for the age of glacial events across Gondwana [PDF]

, 2015
A shelly fauna from the upper part of the Zapla glacial diamictite includes thelingulate brachiopod Orbiculoidea radiata Troedsson, the rhynchonelliforms Dalmanella cf. testudinaria (Dalman) and Paromalomena sp., the bivalve Modiolopsis?
Benedetto, Juan Luis Arnaldo, de la Puente, Graciela Susana, Halpern, Karen, Monaldi, Cesar Ruben   +3 more
core   +2 more sources

Late Ordovician (post–Sardic) rifting branches in the North Gondwanan Montagne Noire and Mouthoumet massifs of southern France [PDF]

, 2015
Upper Ordovician–Lower Devonian rocks of the Cabrières klippes (southern Montagne Noire) and the Mouthoumet massif in southern France rest paraconformably or with angular discordance on Cambrian–Lower Ordovician strata.
Colmenar, Jorge, Monceret, Eric, Pouclet, André, Vizcaïno, Daniel, Álvaro-Blasco, José Javier   +4 more
core   +1 more source

Ordovician climate changes in the northern subtropics: The δ18O record from the Tunguska Basin, Siberia [PDF]

Estonian Journal of Earth Sciences, 2023
Oxygen isotopes from bioapatite (conodonts) have been used for several decades to reconstruct the Palaeozoic climate history. During the Ordovician, conodont-based δ18Ophos studies have revealed a general cooling trend throughout the system.
Peep Männik, Oliver Lehnert, Michael M. Joachimski   +2 more
doaj   +1 more source