acadian orogeny造句

• In North America it shows as later phases of the Acadian orogeny.
• It was deposited during the Acadian Orogeny and is part of the Salina thrust sheet.
• During this time, the Acadian orogeny, which marked the collision of the two continents, occurred.
• The basement beneath the chain is composed from Ordovician marine sediments that were later deformed by the Acadian orogeny.
• The shale was metamorphosed into slate during the Acadian orogeny ( a mountain building period 375 million years ago ).
• The basement structures of the Appalachian foreland basin at the onset of the Acadian orogeny were reactivated during foreland lithospheric flexure.
• The Catskill is the largest bedrock unit of the Upper Devonian in northeast Pennsylvania and the deposition during the Acadian orogeny.
• The genesis of the caldera is related to a period of lithospheric thinning that followed the Acadian Orogeny in the northern Appalachians.
• The collision creating the Acadian orogeny resulted in the closing of the southern Iapetus ocean and the formation of a high mountain belt.
• The Becraft Formation was deposited as part of a carbonate platform which developed within this basin prior to the onset of the Acadian orogeny in the Middle Devonian.
• A total of four orogenies have affected the rocks of the Commonwealth including the Grenville orogeny, the Taconic orogeny, the Acadian orogeny, and the Appalachian orogeny.
• The evidence for the Acadian orogeny is abundant and widespread in the northern Appalachians, recorded by the plutonism and the migration of the northern Appalachian deformation front toward the craton.
• This tectonically-quiet period persisted until the Late Devonian time ( about 360 million years ago ) when the next period of mountain-building began, the Acadian orogeny.
• The fault is believed to have formed in conjunction with the Strathmore Syncline to the south-east during the Acadian orogeny in a sinistral movement on the Highland Boundary Fault.
• Some authors consider the oceanic basin south of the island arc also a part of the Iapetus, this branch closed during the later Acadian orogeny, when Avalonia collided with Laurentia.
• During Middle and Late Devonian time the Acadian Orogeny, with the main uplift to the northeast, resulted in a further source for the predominantly clastic marine deposits of these epochs.
• In the central to southern Appalachians, evidence for the Acadian orogeny is poor, and is found primarily in the plutonism of the Blue Ridge and metamorphism of the Cat Square terrane.
• The Middle Ordovician accretion of the one or more island arcs terranes drove the initial thrusting during the Taconic Orogeny, though reactivation of the fault may have occurred during the middle Devonian Acadian Orogeny.
• The Acadian orogeny experienced at least three major phases of deformation, and in places, foreland-basin, delta-complex clastic wedges, which are responsible for the large volumes of sediment input into the Appalachian basin.
• The Mountains of Acadia represent a collisional tectonic event which was soon followed by a related series of continental collisions which led to a major phase in the mountain-building of the Northern Appalachians known as the Acadian Orogeny.