On the Upper Ordovician unconformity in the Pyrenees : new evidence from the La Cerdanya area
, 2021 In recent years, contradictory reports about whether or not an unconformity exists at the base of the Upper Ordovician succession of the Pyrenees have been made.
Fernández, Óscar +1 more
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Role of Unsaturated Zone on Aquifer Leakage–Assessed With Tidal Response
Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.Abstract Tidal response analysis is widely used to evaluate aquifer systems, but traditional models that neglect the unsaturated zone often underestimate groundwater leakage. This study develops a new analytical model for tidal analysis that incorporates unsaturated zone effects and explained leakage patterns that traditional models could not resolve ...
Guoliang Wang +4 more
wiley +1 more source
Depositional architecture and petroleum potential of the Cambro-Ordovician Hawaz Formation, Murzuq Basin, SW Libya. [PDF]
, 2006 The Murzuq Basin, SW Libya, contains a sedimentary fill up to 4000 m thick, comprising a marine Palaeozoic section and a continental Mesozoic section. The primary reservoir target in the basin is the Upper Ordovician Mamuniyat Formation, but where this ...
Alkhalas, Tarek Jiuma
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First report of an aulaceratid stromatoporoid from the Ordovician of Baltica [PDF]
Estonian Journal of Earth SciencesThe aulaceratid stromatoporoids first appeared in the late Middle Ordovician and had achieved a worldwide distribution in tropical to subtropical shallow-marine environments by the Late Ordovician; however, their presence in Baltica has not been ...
Juwan Jeon, Ursula Toom
doaj +1 more source
Lower Ordovican acritarchs from successions in England and North Wales. [PDF]
, 1979 One hundred and thirty eight acritarch taxa are described from the organic residues of samples collected in North Wales, Shropshire, and the Lake District. The species occur in one or more of 16 microfloral assemblages, selected from 88 prepared samples.
Booth, Graham Arthur
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The palynology and stratigraphy of the Cambrian Nolichucky Shale and associated formations at Thorn Hill, Tennessee, USA [PDF]
, 2012 A detailed palynological and stratigraphic study was undertaken on the Cambrian Nolichucky Shale, Maynardville Limestone and Copper Ridge Dolomite (Conasauga Group), as exposed at Thorn Hill, northeastern Tennessee, USA.
Pedder, Brian E
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Complex examination of the Upper Paleozoic siliciclastic rocks from southern Transdanubia, SW Hungary—Mineralogical, petrographic, and geochemical study [PDF]
, 2007 A vertical section of Upper Paleozoic sandstones from southern Transdanubia (Mecsek-Villány area, Tisza mega-unit, Hungary) has been analyzed for major and trace elements, including rare earth elements (REEs).
Nesbitt +34 more
core +1 more source
Petroleum Exploration and Development, 2017 Based on the carbon isotopic compositions of Cambrian-Ordovician source rocks Kerogen Samples and Paleozoic crude oil in the platform region of Tarim Basin, the origin and source of Paleozoic crude oil were investigated.
Xinjian ZHU +6 more
doaj +1 more source
Upper Ordovician carbon isotope records in the Siljan district, Sweden
, 2009 The Upper Ordovician Boda Limestone and the unconformably overlying Glisstjärn Formation in the Siljan district, Sweden, were sampled for carbon isotope analysis.
Frisk, Åsa, +4 more
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The paleomagnetism of Upper Ordovician strate exposed near Miamitown, Ohio [PDF]
, 1980 Honorable Mention 1980The Upper Ordovician strata (Fairview Formation, Miamitown Shale and Bellevue Limestone) exposed near Miamitown, Ohio, do not exhibit paleomagnetic properties consistent with their age.
Rowan, David J. (David John), 1958-
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