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peneplain    
n. 准平原

准平原

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  • Peneplain - an overview | ScienceDirect Topics
    An old peneplain could be ‘rejuvenated’ by uplift or falling base level and thereby slowly devoured by fresh erosion As Davis described the peneplain: “the decrepit surface must wait either until extinguished by submergence below the sea, or regenerated by elevation into a new cycle of life” (Davis, 1885: 432) This approach seemed to
  • Erosion, isostatic response, and the missing peneplains
    The peneplain—a low-relief erosional plain worn to near base level—is a venerable concept in geomorphology, geology, and geography Cyclic theories of landform development, particularly those deriving from the work of William Morris Davis, typically postulate that denudation should lead to a peneplain
  • Regolith residence time and the concept of surface age of the Piedmont . . .
    Far from being the inactive "mature" landscape envi- sioned by Davis, the Piedmont appears to be an integral part of the geologically active and evolving Appalachian orogen Summary The assumption of a "peneplain" is an incor- rect starting point for investigation of a Pied- mont or other surface of low relief
  • Late Miocene-Pliocene geomorphological evolution of the Xiaoshuizi . . .
    The modern landscape of the Xiaoshuizi peneplain is characterized by an undulating, flattish topography and several monadnocks (Fig 2, Fig 3) The Xiaoshuizi peneplain cross-cuts the region's Sinian limestone and Presinian migmatite marble, and is overlain by thick red clay and Late Pleistocene loess (Fig 3)
  • Erosion, isostatic response, and the missing peneplains
    The peneplain—a low-relief erosional plain worn to near base level—is a venerable concept in geomorphology, geology, and geography Cyclic theories of landform development, particularly those deriving from the work of William Morris Davis, typically postulate that denudation should lead to a peneplain
  • Stratigraphic Landscape Analysis and geomorphological paradigms . . .
    A further argument for the epigene character of the South Småland Peneplain is the presence of remnants of Neogene (probably Miocene) terrestrial plants in Quaternary deposits just to the south of the South Småland Peneplain in northeast Scania (Conwentz, 1892, Linnel, 1936, Magnusson et al , 1963), indicating sub-aerial conditions in
  • Landscape evolution of a bedrock peneplain on the southern Tibetan . . .
    The peneplain is developed in Cretaceous granitoids and Jurassic metasediments of the northern Lhasa block (90°E, 31°N) and originally had a minimum extent of ~ 150 km east–west and ~ 75 km north–south It has been dissected by small rivers that generated a few hundred meters of relief and formed additional bedrock surfaces of limited
  • Cretaceous to Cenozoic evolution of the northern Lhasa Terrane and the . . .
    For the indirect dating of peneplain formation the application of thermochronological methods can serve time constraints The apatite fission track and apatite and zircon (U–Th) He techniques (later these methods are abbreviated as AFT, AHe and ZHe, respectively) describe the cooling history of the basement in which the peneplain was carved
  • Rivers and valleys of Pennsylvania, revisited - ScienceDirect
    The older peneplain came to be known as the Fall Zone surface of Cretaceous age; the ridge summit level was the Schooley peneplain, developed in the early Tertiary In 1931 Douglas Johnson proposed the re- gional superposition of Appalachian rivers from a Coastal Plain cover which extended some 320 km inland and thus had destroyed the pre-ex
  • The Pan-Amazonian Ucayali Peneplain, late Neogene sedimentation in . . .
    The buried peneplain is readily observed in river cutbanks throughout Amazonia as the marked, often angular Ucayali Unconformity that separates eroded, older, often folded, faulted, and weathered, moderately to well consolidated Tertiary formations from unconsolidated, near horizontal, upper Neogene deposits





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