Pennsylvanian в словаре Oxford-Hachette French Dictionary

американский английский

Одноязычные примеры (не проверены редакцией PONS)

английский
In Pennsylvanian-age lyginopteridalean synangia, the sporangia were usually attached to a pad of tissue that was probably homologous to a pinnule on the vegetative fronds.
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There are also clay and shale within the Pennsylvanian bedrock.
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A warm shallow sea again flooded the region near the end of the Pennsylvanian.
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Economically important coal beds were deposited primarily during Pennsylvanian time in a southeastward-thickening foreland basin.
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The fields contain either bituminous coal or semi-anthracite, and all occur within Pennsylvanian strata.
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Around the eastern, southern and western edges of this pluton is a complex association of Pennsylvanian-era argillite, greywacke, chert and diabase.
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The fossils are found in the exposed Pennsylvanian coal seams in the cliffs that overlook the shore.
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The highest ridges and peaks are capped by Pennsylvanian sandstone and shale.
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The Pennsylvanian typically is characterized by terrestrial sediments such as sands, shale and most importantly coal.
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The 25 to 30 meters of shale were formed approximately, during the Pennsylvanian period.
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