Publications

Peer-Reviewed Journal Articles

*Denotes student author

2022

  • VanLandingham*, L, Portenga, EW, Lefroy, EC, Schmidt, AH, Bierman, PR, & Hidy, AJ. Comparison of basin-scale in situ and meteoric 10Be erosion and denudation rates in felsic lithologies across an elevation gradient at the George River, northeast Tasmania, Australia: Geochronology, (in review) Open-access preprint available. [LINK]


2019

  • Portenga, EW, Bierman, PR, Rood, DH, Trodick, CD, Pavich, MJ, & DeJong, BD. Erosion rates and sediment generation within the Potomac River basin over millennial timescales using beryllium isotopes: Geological Society of America Bulletin, 131(7–8), 1295–1311. [LINK]


2018

  • Bierman, PR, Rood, D, Shakun, J, Portenga EW, & Corbett, L. Directly dating post-glacial Greenlandic emergence at high resolution using in situ 10Be: Quaternary Research, 90(1), 110–126. [LINK]


2017

  • Reusser, L, Bierman, P, Rizzo, DM, Portenga, EW, & Rood, DH. Characterizing landscape-scale erosion using 10Be in detrital fluvial sediment – slope-based sampling strategy detects the effect of widespread dams: Water Resources Research, 53(5), 4476–4486. [LINK]

  • Portenga, EW, Bishop, P, Rood, DH, & Bierman, PR. Combining bulk sediment OSL and meteoric 10Be fingerprinting techniques to identify gully initiation sites and erosion depths: Journal of Geophysical Research: Earth Surface, 122(2), 455–572. [LINK]

  • Linari, C, Bierman, P, Portenga, EW, Pavich, M, & Finkel, R. Rates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic 10Be: Earth Surface Processes and Landforms, 42(6), 928–940. [LINK]


2016

  • Portenga, EW, Bishop, P, Gore, DB, & Westaway, KE. Landscape preservation under post-European settlement alluvium in the southeastern Australian Tablelands, inferred from portable OSL reader data: Earth Surface Processes and Landforms, 41(12), 1697–1707. [LINK]

  • Portenga, EW, Westaway, KE, & Bishop, P. Timing of post-European settlement alluvium deposition in SE Australia: A legacy of European land use in the Goulburn Plains: The Holocene, 26(9), 1472–1485. [LINK]

  • Portenga, EW, Rood, DH, Bishop, P, & Bierman, PR. A late Holocene onset of Aboriginal burning in southeastern Australia: Geology, 44(2), 131–134. [LINK]


2015

  • Portenga, EW & Bishop, P. Confirming geomorphological interpretations based on portable OSL reader data: Earth Surface Processes and Landforms, 41(3), 427–432. [LINK]

  • Portenga, EW, Bierman, PR, Duncan, C, Corbett, LB, Kehrwald, NM, & Rood, DH. Erosion rates of the Bhutanese Himalaya determined using in situ-produced 10Be: Geomorphology, 233, 112–126. [LINK]


2014

  • Duxbury, J, Bierman, PR, Portenga, EW, Pavich, MJ, Southworth, S, Miguéns-Rodríguez, M, & Freeman, S. Erosion rates in and around Shenandoah National Park, VA, determined using analysis of cosmogenic 10Be: American Journal of Science, 35(1), 46–76. [LINK]

  • Bierman, PR, Coppersmith, R, Hanson, K, Neveling, J, Portenga, EW, & Rood, DH. A cosmogenic view of erosion, relief generation, and the age of faulting in southern Africa: GSA Today, 24(9), 4–11. [LINK]


2013

  • Portenga, EW, Bierman, PR, Rizzo, DM, & Rood, DH. Low rates of bedrock outcrop erosion in the central Appalachian Mountains inferred from in situ 10Be: Geological Society of America Bulletin, 125(1/2), 201–215. [LINK]


2011

  • Portenga, EW & Bierman, PR. Understanding Earth’s eroding surface with 10Be: GSA Today, 21(8), 4–10. [LINK]

Book Chapters

2021

  • Bierman, PR, Bender, AM, Christ, AJ, Corbett, LB, Halsted, CT, Portenga, EW, & Schmidt, AH. Dating by Cosmogenic Nuclides. In Alderton, D and Elias, SA (Eds.) Encyclopedia of Geology (Second Edition). Academic Press, Elsevier Publishing. [LINK]


2017

  • Bierman, P & Portenga, E. Beryllium Isotopes. In White, WM (Ed.) Encyclopedia of Geochemistry. Springer International Publishing. [LINK]

Conference Presentations

*Denotes student presenter

2019

  • *Kennedy, SA, Portenga, EW, Murray, KE, Bhattarai, S, 2019. Exploring a possible link between trackless zircons and regional volcanism in northern Australia. 2019 Geological Society of America Annual Meeting: Phoenix, Arizona, USA.

  • Portenga, EW, Bierman, PR, Trodick, CD, DeJong, B, Rood, DH, Pavich, MJ, 2019. The current state of post-Colonial landscape disturbance to the Potomac River and Chesapeake Bay. 2019 Geological Society of America Annual Meeting: Phoenix, Arizona, USA.

  • *VanLandingham, LA, Portenga, EW, Bierman, PR, Lefroy, T, 2019. Analysis of 10Be-based erosion and denudation rates in the George River Basin, Tasmania, Australia. 2019 Geological Society of America Annual Meeting: Phoenix, Arizona, USA.


2018

  • Portenga, EW, Murray, KE, Bhattarai, S, Bird, M, Corbett, LB, Bierman, PR, Caffee, MW, Thomson, SN, Fu, X, Li, B, 2018. Investigating landscape response to human arrival to Australia and anthropogenic fire using cosmogenic isotopes and low-temperature thermochronometers. 2018 Geological Society of America Annual Meeting: Indianapolis, Indiana, USA.

  • *Fraleigh, MC, Portenga, EW, Weber, J, 2018. Fault-slip analysis on mesofaults of the Ste. Genevieve Fault System, Hickory Canyons State Recreation Area, Eastern Missouri. 2018 Geological Society of America Annual Meeting: Indianapolis, Indiana, USA.


2017

  • Portenga, EW, Clark, MK, Niemi, NA, 2017. Spatial and temporal patterns of motion along the Malibu Coastal Fault inferred from 10Be erosion rates. 2017 American Geophysical Union Annual Meeting: New Orleans, Louisiana, USA.


2015

  • Bierman, PR, Portenga, EW, Kirby, E, 2015. Mapping erosion of the Appalachian Mountains using cosmogenic 10-Be. 2015 Geological Society of America Annual Meeting: Baltimore, Maryland, USA.

  • Portenga, EW, Bishop, P, Gore, DB, Westaway, KE, 2015. Valley bottom preservation and disturbance in the southeastern Tablelands of post-European Australia. 2015 UK Luminescence and ESR Conference: Glasgow, United Kingdom.


2014

  • Portenga, EW, Bishop, P, Gore, DB, Westaway, KE, Rood, DH, Bierman, PR, 2014. The when, what and how of gully erosion and sediment deposition on the Tablelands of New South Wales, Australia. 2014 Geological Society of America Annual Meeting: Vancouver, British Columbia, Canada.

  • Portenga, EW, Bishop, P, Gore, DB, Westaway, KE, 2014. Landscape change on the SE Australian Tablelands in the Holocene: An updated chronology of gully incision and ‘post-settlement’ alluviation. 2014 European Geosciences Union General Assembly: Vienna, Austria.


2013

  • Portenga, EW, Bishop, P, Gore, DB, Westaway, KE, 2013. Shedding light on recent events: Assessing the timing of gully erosion and sediment deposition on the Australian Tablelands using a portable OSL reader. 2013 Geological Society of America Annual Meeting: Denver, Colorado, USA.

  • Portenga, E, Bierman, P, Duncan, C, 2013. Rain, water, and ice: Driving forces behind rapid erosion in western Bhutan. 2013 International Association of Geomorphologists International Conference: Paris, France.


2012

  • Portenga, EW, Bishop, P, Gore, D, Westaway, K, 2012. Shedding Light on Recent Events: Using Portable Optically Stimulated Luminescence Techniques to Assess Anthropocene Landscape Change on the SE Australian Tablelands. 2012 Australia & New Zealand Geomorphology Group Annual Meeting: Bundanoon, New South Wales, Australia.


2011

  • Bierman, PR, Reusser, L, Portenga, E, 2011. Using 10Be to quantify rates of landscape change in ‘dead’ orogens – millennial scale rates of bedrock and basin-scale erosion in the southern and central Appalachian Mountains. 2011 American Geophysical Union Fall Meeting: San Francisco, California, USA.


2010

  • Nichols, KK, Bierman, PR, Reusser, LJ, Portenga, E, Matmon, A, Rood, DH, 2010. Dual 10Be isotope systems constrain the source of sediment and rate of erosion for the tropical Barron River catchment, Queensland, Australia. 2012 American Geophysical Union Fall Meeting: San Francisco, California, USA.

  • Portenga, EW, Bierman, PR, Trodick, CD, Rood, DH, 2010. Low rates of bedrock outcrop erosion in the Central Appalachian Mountains inferred from in situ 10Be concentrations. 2010 Geological Society of America Annual Meeting: Denver, Colorado, USA.

  • Bierman, PR, Portenga, EW, Reusser, L, Graly, J, Corbett, AB, Borg, J, 2010. Three decades tracing erosion and sediment with cosmogenic nuclides – where do we go next? Landscapes to Rock. Geological Society of London: London, UK.


2009

  • Portenga, EW, Bierman, PR, Rizzo, DM, 2009. A Global Summary and Analysis of Exposed Bedrock Erosion Rates Estimated Using In Situ 10Be. 2009 Geological Society of America Annual Meeting: Portland, Oregon, USA.