Six late Quaternary river terraces, preserved along the Clearwater River in northwestern Washington State, provide a ∼140 ka record of long-term incision and uplift across western side Cascadia forearc high. Terrace ages are constrained by weathering rind radiocarbon dating correlation to dated coastal glacio-fluvial deposits global eustatic curve. The terraces overlie flat bedrock surfaces, called straths, which represent uplifted segments channel. Bedrock is measured height strath relative...

We integrate existing and new geologic data [REtreating TRench, Extension, Accretion Tectonics (RETREAT project)], particularly on the origin, growth, activity of mountain front at Bologna, Italy, into a model that explains Apennine orogenesis in context slab rollback ‐ upper plate retreat process. The Bologna is an actively growing structure driving rock uplift ∼1 mm/year, cored by midcrustal flat‐ramp accommodates ongoing shortening driven Adria subduction rate ∼2.5 mm/year. we use are...

Research Article| June 01, 2002 Holocene strath terraces, climate change, and active tectonics: The Clearwater River basin, Olympic Peninsula, Washington State Karl W. Wegmann; Wegmann 1Division of Geology Earth Resources, Department Natural Olympia, 98504, USA Search for other works by this author on: GSW Google Scholar Frank J. Pazzaglia GSA Bulletin (2002) 114 (6): 731–744. https://doi.org/10.1130/0016-7606(2002)114<0731:HSTCCA>2.0.CO;2 Article history received: 30 Mar 2001 rev-recd: 18...

A perplexing macrogeomorphic problem is the persistence of topography in mountain ranges that were initially formed by orogenic events hundreds millions years old. In this paper, we deconvolve post‐Triassic history a portion one these ranges, central and northern Appalachians, using well‐documented offshore isopach sedimentary record US Atlantic margin. Topography an important signature tectonic, eustatic and/or geomorphic processes produces changes erodible thickness crust (ETC). We define...

The incision of rivers in bedrock is thought to be an important factor that influences the evolution relief tectonically active orogens. At present, there are at least six competing models for rivers, but these have received little quantitative testing. We statistically evaluate using observations from Clearwater River northwestern Washington State, which crosses actively rising forearc high Cascadia margin. A previous study has used fluvial terraces along estimate rates over last ∼150 kyr....

Despite the century‐long recognition of regional epeirogeny along middle Atlantic passive margin, relatively few studies have focused on understanding postrift uplift mechanisms. Here, we demonstrate that epeirogenic central Appalachian Piedmont and subsidence Salisbury Embayment represent first‐order, flexural isostatic processes driven by continental denudation offshore deposition. Our results show processes, present all Atlantic‐type margins, are best resolved specific stratigraphic...

Longitudinal profiles of alluvial and bedrock rivers are typically concave up, the precise shape their concavity is known to integrate tectonic, climatic, channel grain size distribution factors. We isolate climatic/hydrologic effects on profile through a spatial analysis large watersheds with mixed bedrock‐alluvial trunk channels spanning steep gradient in tectonically stable landscape. Forty eastern American high plains were selected minimize variability base level, relief, vegetation,...

Research Article| March 01, 2007 Knickpoint evolution in a vertically bedded substrate, upstream-dipping terraces, and Atlantic slope bedrock channels Kurt L. Frankel; Frankel 1Department of Earth Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA Search for other works by this author on: GSW Google Scholar Frank J. Pazzaglia; Pazzaglia Jordan D. Vaughn Author Article Information Publisher: Geological Society America Received: 10 Jan 2006 Revision 11 Oct Accepted:...

Research Article| June 01, 2001 Knickzone propagation in the Black Hills and northern High Plains: A different perspective on late Cenozoic exhumation of Laramide Rocky Mountains Brent J. Zaprowski; Zaprowski 1Department Earth Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA Search for other works by this author on: GSW Google Scholar Edward B. Evenson; Evenson Frank Pazzaglia; Pazzaglia Jack Epstein 2U.S. Geological Survey, MS 926A, Reston, Virginia 20192,...

Research Article| March 01, 2014 Unraveling tectonic and climatic controls on synorogenic growth strata (Northern Apennines, Italy) Kellen L. Gunderson; Gunderson 1Lehigh University, Department of Earth Environmental Sciences, 1 W. Packer Ave., Bethlehem, Pennsylvania 18015, USA †Current address: Chevron Energy Technology Company, 1500 Louisiana St., Houston, Texas 77002, USA; kgunderson@chevron.com. Search for other works by this author on: GSW Google Scholar Frank J. Pazzaglia; Pazzaglia...

Unsteady base-level fall at river mouths generates knickpoints that migrate as a transient upstream through the drainage network, climbing same rate long fluvial erosion process follows detachment-limited stream power law. Here we demonstrate unsteady and nonuniform rock uplift using geomorphic markers in streams draining eastern flank of Peloritani Mountains (northeast Sicily), footwall an ∼40-km-long offshore northeast-southwest–oriented normal fault where is documented by flight mapped...

Research Article| July 01, 2015 The dynamic reference frame of rivers and apparent transience in incision rates Sean F. Gallen; Gallen 1Department Earth Environmental Sciences, University Michigan, Ann Arbor, Michigan 48109, USA *Current address: Geological Institute, ETH Zurich, No E 31, Sonneggstrasse 5, 8092 Switzerland. Search for other works by this author on: GSW Google Scholar Frank J. Pazzaglia; Pazzaglia 2Department Lehigh University, Bethlehem, Pennsylvania 18015, Karl W. Wegmann;...

Research Article| January 01, 2014 Decay of an old orogen: Inferences about Appalachian landscape evolution from low-temperature thermochronology Ryan E. McKeon; McKeon † 1Department Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA †Now at Division Geological Planetary California Institute Technology, Pasadena, 91125, USA; e-mail: rmckeon@caltech.edu Search for other works by this author on: GSW Google Scholar Peter K. Zeitler; Zeitler Frank J....

ABSTRACT The continuous feedbacks among tectonics, surface processes, and climate are reflected in the distribution of catchments on active mountain ranges. Previous studies have shown a regularity valley spacing across ranges worldwide, but origin this geomorphological feature is currently not well known. In work, we use landscape evolution model to investigate process fluvial network organization regular ridge‐and‐valley patterns simulated particular, behavior such when subjected...

Abstract The Moroccan High Atlas, the Anti‐Atlas belts, and Siroua volcanic massif form an orographic system locally risen to elevations over 4 km. Topographic growth of this occurred by Cenozoic transpressive inversion Mesozoic rift structures concomitant with activity related mantle processes. In order constrain topographic growth, we analyze regional‐scale exhumation pattern, compare it physiographic features. We contribute 35 new mean (U‐Th‐Sm)/He 24 fission track ages on apatite from...

Research Article| September 01, 2006 Effects of urbanization on watershed hydrology: The scaling discharge with drainage area Joshua C. Galster; Galster 1Department Earth and Environmental Sciences, Lehigh University, 31 Williams, Bethlehem, Pennsylvania 18015, USA Search for other works by this author on: GSW Google Scholar Frank J. Pazzaglia; Pazzaglia Bruce R. Hargreaves; Hargreaves Donald P. Morris; Morris Stephen Peters; Peters Richard N. Weisman 2Department Civil Engineering, 19...