Results 91 to 100 of about 6,764 (250)

The Range and Evolution Model of the Xiang-E Submarine Uplifts at the Ordovician–Silurian Transition: Evidence from Black Shale Graptolites

Journal of Marine Science and Engineering
Accurately delineating the range of the Xiang-E submarine uplifts is the key to the exploration and development of Silurian shale gas in the Western Hunan–Hubei region.
Zhi Zhou, Hui Zhou, Zhenxue Jiang, Shizhen Li, Shujing Bao, Guihong Xu   +5 more
doaj   +1 more source

Lithofacies and sedimentary characteristics of the Silurian Longmaxi Shale in the southeastern Sichuan Basin, China

Journal of Palaeogeography, 2013
The Silurian Longmaxi Shale (SLS) is the target for shale gas exploration and exploitation in the southeastern Sichuan Basin. Based on detailed description of cores and outcrops, analysis of Gamma Ray (GR) logs, thin sections and mineralogical data, the ...
Jiang Zaixing, Guo Ling, Liang Chao
doaj   +1 more source

The palaeobiogeographical spread of the acritarch Veryhachium in the Early and Middle Ordovician and its impact on biostratigraphical applications [PDF]

, 2014
The genus Veryhachium Deunff, 1954, is one of the most frequently documented acritarch genera, being recorded from the Early Ordovician to the Neogene.
Li, Jun, Molyneux, Stewart G., Rubinstein, Claudia V., Servais, Thomas, Vecoli, Marco, Yan, Kui   +5 more
core   +2 more sources

A Lower Silurian (Aeronian) radiolarian assemblage from black cherts of the Armorican Massif (France)

, 2014
International audienceThe Chalonnes-sur-Loire outcrop is the most complete Llandovery section in the Ligerian domain (Armorican Massif, NW France); it displays a ca.
Dabard, Marie-Pierre, Danelian, Taniel, Ghienne, Jean-François, Tetard, Martin   +3 more
core   +4 more sources

Katian (Upper Ordovician) conodonts from Wales [PDF]

, 2013
Middle and upper Katian conodonts were previously known in the British Isles from relatively small collections obtained from a few localities. The present study is mainly based on 17 samples containing more than 17 000 conodont elements from an ...
An, Baars, Barnes, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Bergström, Branson, Brenchley, Chen, Cooper, Dzik, Dzik, Epstein, Ethington, Ferretti, Ferretti, Ferretti, Ferretti, Ferretti, Fortey, Fortey, Fuchs, Fuchs, Fuganti, Glenister, Goldman, Grahn, Henningsmoen, Ingham, Kaljo, Kennedy, Knüpfer, Kohut, Lindström, Lindström, Matthews, McCRACKEN, Moral, Männik, Nielsen, Nõlvak, Orchard, Orchard, Price, Price, Price, Price, Rexroad, Rhodes, Rhodes, Rickards, Sarmiento, Savage, Sergeeva, Serpagli, Skoglund, Stauffer, Sweet, Sweet, Sweet, Sweet, Sweet, Vandenbroucke, Vandenbroucke, Viira, Walliser, Webers, Weyant, Williams, Zalasiewicz, Zhang   +85 more
core   +1 more source

Graptolites [PDF]

Geological Magazine
Jan Zalasiewicz, Mark Williams, Adrian W.A. Rushton   +2 more
  +6 more sources

The search for ‘hot shales’ in the western Kufra Basin, Libya: geochemical and mineralogical characterisation of outcrops, and insights into latest Ordovician climate [PDF]

, 2015
Across the Saharan platform, mudrocks of latest Ordovician–Silurian age (the Tanezzuft Formation) are a major source rock interval for Palaeozoic petroleum systems, but source rock quality is variable and difficult to predict.
Abutarruma, Y, Elgadry, M, Le Heron, DP, Meinhold, G   +3 more
core   +1 more source

Pristiograptus (Graptoloidea) from the perneri - lundgreni biozones (Silurian) of Lithuania

Carnets de Géologie, 2003
Two new forms of Pristiograptus dubius, here designated as varieties "A" and "B", are described and figured. Both were found in core samples representing the perneri through lundgreni biozones of the Wenlock epoch.
Radzevičius Sigitas
doaj  

A modern assessment of Ordovician chitinozoans from the Shelve and Caradoc areas, Shropshire, and their significance for correlation [PDF]

, 2009
New chitinozoan data are presented from the classical section along the Onny River in the type Caradoc area, and from the deeper-water sections in the Shelve area, including the former British candidate GSSP for the base of the Upper Ordovician Series ...
Achab, ANTONIO ANCILLETTA, Bancroft, Bergström, Cave, Dean, Dean, Hurst, JACQUES VERNIERS, Jansonius, Jenkins, Lynas, Murchison, Nõlvak, Nõlvak, Nõlvak, Pocock, RICHARD A. FORTEY, Rushton, Savage, Strachan, THIJS R. A. VANDENBROUCKE, Turner, Whittard   +23 more
core   +2 more sources

L'ontogenese des graptolites

Bulletin de la Société Géologique de France, 1959
Abstract Traces the ontogenetic development of graptolites, reporting details of the various growth stages of a graptolite colony.
openaire   +1 more source