Constraints from deep crustal structure on long-term landform development of the British Isles and Eastern United States

Battiau-Queney, Yvonne

doi:10.1016/0169-555x(89)90006-8

Cited by 16 publications

(12 citation statements)

References 33 publications

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“…White (1950) proposed that normal-sense reactivation of the nearby Brevard/Bowens Creek fault zone produced the escarpment. Numerous workers have cited isostatic rebound related to thickened Appalachian crust or flexural response to offshore sediment loading as drivers of BRE formation and evolution (Wright, 1927;Pratt et al, 1988;Battiau-Queney, 1989;Hubbard et al, 1991;Pazzaglia and Brandon, 1996;Pazzaglia and Gardner, 2000). Spotila et al (2004) presented thermochronological constraints on BRE evolution.…”

Section: The Blue Ridge Escarpmentmentioning

confidence: 98%

New physical evidence of the role of stream capture in active retreat of the Blue Ridge escarpment, southern Appalachians

2010

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Section: The Blue Ridge Escarpmentmentioning

confidence: 98%

New physical evidence of the role of stream capture in active retreat of the Blue Ridge escarpment, southern Appalachians

2010

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“…The erosional history and development of the Blue Ridge escarpment have been extensively studied but remain incompletely understood although multiple lines of evidence suggest at least some and perhaps significant control on the overall surface morphology by tectonic and/or mantle processes (Davis, ; White, ; Dietrich, , ; Hack, ; Battiau‐Queney, ; Pazzaglia and Gardner, ; Tucker and Slingerland, ; Pazzaglia and Brandon, ; Spotila et al , ). Seismic data suggest that the high topography of the escarpment is underlain by a thick root of low‐density continental crust while the adjacent lowlands are underlain by denser material (Pratt et al , ; Wagner et al , ).…”

Section: Introductionmentioning

confidence: 99%

Rates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic ¹⁰Be

Linari

Bierman

Portenga

et al. 2016

Earth Surf Processes Landf

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The Blue Ridge escarpment, located within the southern Appalachian Mountains of Virginia and North Carolina, forms a distinct, steep boundary between the lower‐elevation Piedmont and higher‐elevation Blue Ridge physiographic provinces. To understand better the rate at which this landform and the adjacent landscape are changing, we measured cosmogenic beryllium‐10 (10Be) in quartz separated from sediment samples (n = 50) collected in 32 streams and from three exposed bedrock outcrops along four transects normal to the escarpment, allowing us to calculate erosion rates integrated over 104–105 years. These basin‐averaged erosion rates (5.4–49 m Myr−1) are consistent with those measured elsewhere in the southern Appalachain Mountains and show a positive relationship between erosion rate and average basin slope. Erosion rates show no relationship with basin size or relative position of the Brevard fault zone, a fundamental structural element of the region. The cosmogenic isotopic data, when considered along with the distribution of average basin slopes in each physiographic province, suggest that the escarpment is eroding on average more rapidly than the Blue Ridge uplands, which are eroding more rapidly than the Piedmont lowlands. This difference in erosion rates by geomorphic setting suggests that the elevation difference between the uplands and lowlands adjacent to the escarpment is being reduced but at extremely slow rates. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Other studies have suggested the escarpment formed by uplift of the Blue Ridge highlands above the Piedmont via broad, monoclinal tectonic warping (Hayes & Campbell, 1894; Wright, 1927a). Battiau‐Queney (1989) proposed localized uplift along the axis of the divide associated with lower crustal flow towards the west, driven by regional tectonic compression. This was based on the association of the escarpment and a steep gravity gradient produced by a gravity high in the inner (i.e.…”

Section: Introductionmentioning

confidence: 99%

Origin of the Blue Ridge escarpment along the passive margin of Eastern North America

et al. 2003

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The Blue Ridge escarpment is a rugged landform situated within the ancient Appalachian orogen. While similar in some respects to the great escarpments along other passive margins, which have evolved by erosion following rifting, its youthful topographic expression has inspired proposals of Cenozoic tectonic rejuvenation in eastern North America.To better understand the post-orogenic and post-rift geomorphic evolution of passive margins, we have examined the origin of this landform using low-temperature thermochronometry and manipulation of topographic indices. Apatite (UT h)/He and ¢ssion-track analyses along transects across the escarpment reveal a younging trend towards the coast.This pattern is consistent with other great escarpments and ¢ts with an interpretation of having evolved by prolonged erosion, without the requirement of tectonic rejuvenation. Measured ages are also comparable speci¢cally to those measured along other great escarpments that are as much as 100 Myr younger.This suggests that erosional mechanisms that maintain rugged escarpments in the early post-rift stages may remain active on ancient passive margins for prolonged periods.The precise erosional evolution of the escarpment is less clear, however, and several end-member models can explain the data. Our preferred model, which ¢ts with all data, involves a signi¢cant degree of erosional escarpment retreat in the Cenozoic. Although this suggests that early onset of topographic stability is not required of passive margin evolution, more data are required to better constrain the details of the escarpment's development.

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Constraints from deep crustal structure on long-term landform development of the British Isles and Eastern United States

Cited by 16 publications

References 33 publications

New physical evidence of the role of stream capture in active retreat of the Blue Ridge escarpment, southern Appalachians

New physical evidence of the role of stream capture in active retreat of the Blue Ridge escarpment, southern Appalachians

Rates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic ¹⁰Be

Origin of the Blue Ridge escarpment along the passive margin of Eastern North America

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Constraints from deep crustal structure on long-term landform development of the British Isles and Eastern United States

Cited by 16 publications

References 33 publications

New physical evidence of the role of stream capture in active retreat of the Blue Ridge escarpment, southern Appalachians

New physical evidence of the role of stream capture in active retreat of the Blue Ridge escarpment, southern Appalachians

Rates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic 10Be

Origin of the Blue Ridge escarpment along the passive margin of Eastern North America

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Rates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic ¹⁰Be