Pennsylvanian nel dizionario italiano Oxford-Paravia

Esempi monolingue (non verificati dalla Redazione di PONS)

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Economically important coal beds were deposited primarily during Pennsylvanian time in a southeastward-thickening foreland basin.
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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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Although these notes were denominated in pounds, shillings and pence, they were worth less than sterling, with 1 Pennsylvanian shilling equalling 9 pence sterling.
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The Pennsylvanian typically is characterized by terrestrial sediments such as sands, shale and most importantly coal.
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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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The area is underlain by Pennsylvanian sandstone, shale, and siltstone, where some folding and faulting has occurred.
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The last two deformational phases in the Pennsylvanian formed under extensional stresses and again produced a cross pattern in the resulting structures.
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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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