Viséan

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Viséan

[vi′sā·ən]
(geology)
A European stage of lower Carboniferous geologic time forming the lowermost Upper Mississippian, above Tournaisian and below lower Namurian.
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The likely causes of these events were Carboniferous terrane accretion and collision during the Variscan orogeny in central Europe, which peaked in Visean times.
Lower Visean and Turnaisian reservoirs, at depths varying from 4,500 to
The thrust fault occurred after the deposition and lithification of the Visean Windsor Group, and most likely took place during the Alleghanian orogeny in the Late Carboniferous to Permian.
Scorpions from the Visean of East Kirkton, West Lothian, Scotland, with a revision of the infraorder Mesoscorpionina.
The reservoir formation to be tapped is situated at a depth of 1,800 m in a karst limestone dated Visean (upper paleozoic).
The limestone is part of the Galway-Roscommon Shelf, a Visean succession that consists almost entirely of limestones of shallow-water shelf facies extending from east County Clare and County Galway in the south, to counties Mayo and Roscommon in the north (Sevastopulo and Wyse Jackson, 2001).
Mounds with a packstone fabric also have been reported from the Fort Payne Formation of Kentucky (Ausich and Meyer, 1990) and Visean strata of Ireland and England (Lees and Miller, 1995).
Prior to USPS, he held a variety of executive positions at Cisco Systems, Visean, Halliburton and Schlumberger.
Visean targets are confirmed to be hydrocarbon-bearing
This exposure first occurred in the Late Tournasian but through-transport of Mira debris was almost completely blocked early in the Visean.