Results 21 to 30 of about 2,124,047 (278)
Silurian graptolite biostratigraphy of the Röstånga-1 drill core, Scania:a standard for southern Scandinavia [PDF]
, 2014 The Rostanga-1 core from west-central Scania provides the most complete succession of the Sandbian (Upper Ordovician) through lower Telychian (Silurian, Llandovery) strata of southern Scandinavia. The Hirnantian is identified in the Kallholn Formation by
Ahlberg, Per +3 more
core +2 more sources
Population structure of graptolite assemblages [PDF]
, 1998 Graptolite rhabdosomes display a diverse suite of morphologies. The range of morphotypes present within most moderate to high diversity assemblages from the Ordovician and Silurian is similar, despite the different taxonomic composition of the faunas at ...
Brenchley +27 more
core +1 more source
Geofluids, 2019 The upper Ordovician-lower Silurian shale has always been the main target of marine shale gas exploration in southern China. However, the shale gas content varies greatly across different regions.
Ming Wen +14 more
doaj +1 more source
Natural gas accumulation and models in Ordovician carbonates, Ordos Basin, NW China
Petroleum Exploration and Development, 2014 According to sedimentary environment, sources, hydrocarbon accumulation characteristics and gas reservoir types of the Ordovician in the Ordos Basin, the Ordovician carbonate rocks in the basin have good gas accumulation conditions.
Yanru GUO +9 more
doaj +1 more source
An Ordovician ostracod palaeopsychrosphere? [PDF]
Estonian Journal of Earth Sciences, 2023 Ostracods are tiny bivalved crustaceans with a fossil record extending into rocks of the Lower Ordovician. They occupy almost all aquatic environments today, from the ocean abyssal planes to damp forest leaf litter.
Anna McGairy +6 more
doaj +1 more source
THE AMERICAN UPPER ORDOVICIAN STANDARD [PDF]
Geological Society of America Bulletin, 1961 The large number of classifications of the type Cincinnatian (Ordovician) are to a great extent variations of a few fundamental concepts. Each of these elements is at least 40 years old and founded in the more rigid stratigraphic faiths of those times.
openaire +1 more source
A geomagnetic polarity stratigraphy for the Middle and Upper Ordovician [PDF]
Palaeogeography, Palaeoclimatology, Palaeoecology, 2021 Magnetostratigraphic studies of the Ordovician provide evidence for the nature of core-mantle boundary interactions, and provide means for dating and correlation across differing environmental regimes. We provide new magnetostratigraphic data from the Middle and Upper Ordovician, compiling this into a polarity chronostratigraphic scale for the ...
Hounslow, M.W. +6 more
openaire +3 more sources
Petroleum Exploration and Development, 2012 A process for identifying marine hydrocarbon source rocks is established based on outcrop measurement, ground-penetrating radar survey, core analysis, logging evaluation, seismic interpretation, etc.
Shuichang ZHANG +5 more
doaj +1 more source
The Ordovician strata of the Ennedi Plateau, northeastern Chad (Erdi Basin)
Comptes Rendus. Géoscience, 2023 In the Ennedi Plateau, northeastern Chad, Cambrian(?)–Ordovician to Carboniferous strata represent one of the most proximal succession of the north-facing Gondwana platform. This study presents preliminary results related to the c.
Ghienne, Jean-François +4 more
doaj +1 more source
Natural Gas Industry B, 2016 During the progressive exploration of the Jingbian Gas Field in the Ordos Basin, multiple gas-bearing regions have been discovered in the dolomite reservoirs in the Middle Ordovician assemblages of Lower Paleozoic in Jingxi area, but these gas-bearing ...
Xinshe Liu +6 more
doaj +1 more source