Miocene rejuvenation of topographic relief in the southern Appalachians

@article{Gallen2013MioceneRO,
  title={Miocene rejuvenation of topographic relief in the southern Appalachians},
  author={Sean F. Gallen and Karl W. Wegmann and DelWayne R. Bohnenstieh},
  journal={Gsa Today},
  year={2013},
  volume={23},
  pages={4-10}
}
Conventional wisdom holds that the southern Appalachian Mountains have not experienced a significant phase of tectonic forcing for >200 myr; yet, they share many characteristics with tectonically active settings, including locally high topographic relief, steep slopes, incised river gorges, and frequent mass-wasting events. Two competing hypotheses are commonly used to explain their modern topographic expression. One suggests that relief is largely controlled by variable lithologic resistance… Expand

Tables from this paper

Neogene rejuvenation of central Appalachian topography: Evidence for differential rock uplift from stream profiles and erosion rates
Abstract The persistence of topography within ancient orogens remains one of the outstanding questions in landscape evolution. In the eastern North American Appalachians, this question is manifest inExpand
Rejuvenation of Appalachian topography caused by subsidence-induced differential erosion
Topographic relief continued to develop in the Appalachian Mountains, eastern USA, long after the tectonic forces that created the range had become inactive. Numerical modelling and reconstructionsExpand
Tectonically driven drainage reorganization in the Eastern Cordillera, Colombia
Abstract High-elevation plateaus that are positioned in between topographic barriers are common orogenic features in the South American continent, formed under a range of evolving environmentalExpand
Unsteady migration of Taebaek Mountain drainage divide, Cenozoic extensional basin margin, Korean Peninsula
Abstract The Taebaek Mountain Range (TBR) initially formed via extension of a back-arc basin in the East Sea during the early-Miocene (ca. ~22 Ma) and exemplifies a typical escarpment on a passiveExpand
Growing topography due to contrasting rock types in a tectonically dead landscape
Many mountain ranges survive in a phase of erosional decay for millions of years following the cessation of tectonic activity. Landscape dynamics in these post-orogenic settings have long puzzledExpand
Dynamic and Tectonic Landscapes in Eastern Oregon Reveal Neogene to Quaternary Rearrangement of Topography.
MORRISS, MATTHEW CONNOR. Dynamic and Tectonic Landscapes in Eastern Oregon Reveal Neogene to Quaternary Rearrangement of Topography. (Under the direction of Karl W. Wegmann). Eastern Oregon containsExpand
Growing topography due to contrasting rock types in a tectonically dead landscape
Abstract. Many mountain ranges survive in a phase of erosional decay for millions of years following the cessation of tectonic activity. Landscape dynamics in these post-orogenic settings have longExpand
Erosion of an active fault scarp leads to drainage capture in the Amazon region, Brazil
Far from the continental margin, drainage basins in Central Amazonia should be in topographic steady state; but they are not. Abandoned remnant fluvial valleys up to hundreds of square kilometers inExpand
Hillslope denudation and morphologic response to a rock uplift gradient
Abstract. Documenting the spatial variability of tectonic processes from topography is routinely undertaken through the analysis of river profiles, since a direct relationship between fluvialExpand
Decay of an old orogen: Inferences about Appalachian landscape evolution from low-temperature thermochronology
The Appalachian Mountains (eastern United States) are the archetypal old, long-decaying orogen from which major theories for long-term landscape evolution have been derived. However, given theExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 26 REFERENCES
Hillslope response to knickpoint migration in the Southern Appalachians: implications for the evolution of post-orogenic landscapes
The southern Appalachians represent a landscape characterized by locally high topographic relief, steep slopes, and frequent mass movement in the absence of significant tectonic forcing for at leastExpand
Macrogeomorphic evolution of the post-Triassic Appalachian mountains determined by deconvolution of the offshore basin sedimentary record
A perplexing macrogeomorphic problem is the persistence of topography in mountain ranges that were initially formed by orogenic events hundreds of millions of years old. In this paper, we deconvolveExpand
A record of Appalachian denudation in postrift Mesozoic and Cenozoic sedimentary deposits of the U.S. Middle Atlantic continental margin
Abstract The complex interplay between source-terrain uplift, basin subsidence, paleoclimatic shifts, and sea-level change, left an extensive sedimentary record in the contiguous offshore basins ofExpand
An episode of rapid bedrock channel incision during the last glacial cycle, measured with 10Be
We use 10 Be to infer when, how fast, and why the Susquehanna River incised through bedrock along the U.S. Atlantic seaboard, one of the world's most prominent and ancient passive margins. AlthoughExpand
Temporally and spatially uniform rates of erosion in the southern Appalachian Great Smoky Mountains
We measured 1 0 Be in fluvial sediment samples (n = 27) from eight Great Smoky Mountain drainages (1-330 km 2 ). Results suggest spatially homogeneous sediment generation (on the 10 4 -10 5 yr timeExpand
Topographic controls on erosion rates in tectonically active mountain ranges
The functional relationship between erosion rate and topography is central to understanding both controls on global sediment flux and the potential for feedback between tectonics, climate, andExpand
Tectonics from topography: Procedures, promise, and pitfalls
Empirical observations from fl uvial systems across the globe reveal a consistent power-law scaling between channel slope and contributing drainage area. Theoretical arguments for both detachmentandExpand
Does climate change create distinctive patterns of landscape incision
[1] Incised fluvial systems are typically interpreted as recording geologically recent changes in either climate or tectonics. However, few diagnostic tools exist to evaluate whether particularExpand
Long‐term landscape evolution: linking tectonics and surface processes
Research in landscape evolution over millions to tens of millions of years slowed considerably in the mid-20th century, when Davisian and other approaches to geomorphology were replaced byExpand
Cosmogenic nuclide-based investigation of spatial erosion and hillslope channel coupling in the transient foreland of the Swiss Alps
Abstract Transient landscape disequilibrium is a common response to climatic fluctuations between glacial and interglacial conditions. Such landscapes are best suited to the investigation ofExpand
...
1
2
3
...