Conference Abstracts

Most presentations first-authored by CMS are archived here. Bolded names are graduate students supervised by CMS, italicized names are postdocs supervised by CMS, and * indicates undergraduate supervised by CMS.

    2025

  1. Vesper, D.J., Zanoni, A.J., Watters, B.*, and Shobe, C.M. (2025) Water chemistry in small mixed-lithology catchments in the Valley and Ridge province. Abstract submitted to GSA joint Northeastern and North-Central section meeting.

    2. 2024

  2. Chilton, K.D., Zedan, M., Strom, K., and Shobe, C.M. (2024) Dip angle controls on plucking dynamics and knickpoint evolution in bedrock rivers. Talk at AGU annual meeting.
  3. Morey, S.M., Huntington, K., Lang, K., and Shobe, C.M. (2024) Beyond erosion: The depositional power of megafloods to shape mountain landscapes. Talk at AGU annual meeting. (Invited).
  4. Shobe, C.M., Ryan, S.E., Rathburn, S.L., Dixon, M.K., Fegel, T., and Rhoades, C.C. (2024) Suspended-sediment response to wildfire and a major post-fire flood. Poster at AGU annual meeting.
  5. Shobe, C.M. and Scott, D. (2024) Modeling how large wood influences bifurcation potential in gravel-bed rivers. Poster at AGU annual meeting.
  6. Walker, M., Hessl, A., Shobe, C.M., Andreu-Hayles, L., Nachin B., Suran, B., Dey, L., and Byambasuren, O. (2024) Reconstructing extreme 14C production events using tree rings: Does tree physiology affect estimates of atmospheric 14C? Poster at AGU annual meeting.
  7. Vesper, D.J., Zanoni, A.J., Watters, B.*, and Shobe, C.M. (2024) Comparison of water chemistry for 30 catchments in the Valley and Ridge province. Poster at Appalachian Karst Symposium.
  8. Huntington, K.W., Morey, S.M., Lang, K.A., Shobe, C.M., Turzewski, M., Mangipudi, M., Johnson, A.G., Loreen, C., Nath, S., Montgomery, D.R., and Duvall, A.R. (2024) Geomorphic legacy of megaflood deposition in mountain rivers, eastern Himalaya. Talk at GSA annual meeting.
  9. Covington, M., Shobe, C.M., Luhmann, A.J., Abolins, M., Noble, M., Oleson, E., Gao, Y., and Ye, M. (2024) Exploring the controls of karstification by analyzing karst surface drainage across the United States. Talk at GSA annual meeting. (Invited).
  10. Morey, S.M., Shobe, C.M., Huntington, K.W., Lang, K., Johnson, G., and Duvall, A.R. (2024) The lasting legacy of megaflood boulder deposition in mountain rivers. Poster at CSDMS annual meeting.
  11. Chilton, K.D., Strom, K.B., and Shobe, C.M. (2024) The impact of discontinuity orientation on fluvial erosion and evolution: modeling Valley and Ridge bedrock rivers inside a flume. Talk at GSA Southeastern section meeting.

    12. 2023

  12. Shobe, C.M., Bower, S.J., Maxwell, A.E., Glade, R.C., Samassi, N.M., and Campforts, B. (2023) The uncertain future of mountaintop-removal-mined landscapes. Poster at AGU annual meeting.
  13. Nath, S., Lang,K., Morey, S.M., Turzewski, M., Shobe, C.M., Larsen, I.J., and Huntington, K.W. (2023) Observations of outburst flood deposits along the Siang River, eastern Himalaya. Poster at AGU annual meeting.
  14. Morey, S.M., Shobe, C.M., Huntington, K.W., Lang, K., Johnson, G., and Duvall, A.R. (2023) The lasting legacy of megaflood boulder deposition: considering the longterm impact of megafloods on mountain rivers. Talk at AGU annual meeting. (Invited).
  15. Zanoni, A., Shobe, C.M., Vesper, D.J., and Watters, B.* (2023) Quantifying chemical erosion in the lithologically heterogenous Appalachian Valley and Ridge. Poster at GSA annual meeting.
  16. Mann, A.A., Crowder, C.A.*, Miller, I.N.*, Shobe, C.M., and Russoniello, C.R. (2023) (Non-)recovery of an agricultural stream from straightening and dredging. Poster at GSA annual meeting.
  17. Colaianne, N.J., Shobe, C.M., Moler, J.*, Benison, K., and Chilton, K.D. (2023) Lithologic con- trols on bedrock channel form from the micron to meter scale. Talk at GSA annual meeting.
  18. Shobe, C.M., Morey, S.M., Huntington, K.W., Lang, K., Johnson, G., and Duvall, A.R. (2023) The lasting legacy of megaflood boulder deposition in mountain rivers. Talk at GSA annual meeting.
  19. Shobe, C.M., Bower, S.J., Maxwell, A.E., and Campforts, B. (2023) Past and future shaping of mountaintop-removal-mined landscapes by gullying. Poster at GSA annual meeting.
  20. Lang, K., Nath, S., Morey, S.M., Turzewski, M., Shobe, C.M., and Huntington, K.W. (2023) Observations of flood deposits along the Siang River, eastern Himalaya. Poster at the megafloods Penrose conference.
  21. Morey, S.M., Shobe, C.M., Huntington, K.W., Lang, K., Johnson, G., and Duvall, A.R. (2023) Bould(er) Implications: the geomorphic legacy of megaflood deposition on river processes and form. Poster at the megafloods Penrose conference.
  22. Huntington, K.W., Morey, S., Lang, K., Shobe, C.M., Turzewski, M., Mangipudi, M., Johnson, G., Loreen, C., Montgomery, D., Licht, A., and Duvall, A.R. (2023) The legacy of megaflood erosion and deposition from mountain source to sink, Eastern Himalaya. Talk at the megafloods Penrose conference. (Invited).
  23. Campforts, B., Duvall, A.R., Shobe, C.M., Tucker, G.E., and Overeem, I. (2023) Are spatial and temporal patterns of landslide triggering events reflected in topography and sediment dynamics? Talk at EGU annual meeting.
  24. Vrouwenvelder, K.T., Shobe, C.M., Moerchen, M., and Giampoala, M. (2023) Geobites: 3 Years of Science Communication Training in Practice. Talk at EGU annual meeting.
  25. Maxwell, A.E., Odom, W.E., Doctor, D.H., and Shobe, C.M. (2023) Feature space considerations for geomorphic deep learning using digital terrain variables. Talk at GSA NE/SE section meeting.

    26. 2022

  26. Chilton, K.D., Strom, K.B., and Shobe, C.M. (2022) Investigating the impact of discontinuity orientation on fluvial bedrock erodibility and landscape evolution. Poster presentation at American Geophysical Union annual meeting.
  27. Shobe, C.M., Braun, J., Yuan, X.P., Campforts, B., Gailleton, B., Baby, G., Guillocheau, F., and Robin, C. (2022) Deciphering passive margin stratigraphy to reveal seascape evolution processes. Poster presentation at American Geophysical Union annual meeting. abstract | poster
  28. Morey, S., Shobe, C.M., Huntington, K.W., Lang, K.A., Johnson, G., and Duvall, A.R. (2022) The geomorphic legacy of megaflood derived boulders on river processes and form. Poster presentation at American Geophysical Union annual meeting. (Invited).
  29. Campforts, B., Shobe, C.M., Overeem, I., and Tucker, G.E. (2022) Landsliding sustains persistent ridge and valley migration in mountainous terrain. Oral presentation at American Geophysical Union annual meeting.
  30. Crowder, C.A.*, Miller, I.N.*, Shobe, C.M., and Russoniello, C.J. (2022) Monitoring erosion in a straightened and dredged agricultural stream. Poster presentation at Geological Society of America annual meeting.
  31. Chilton, K.D., Strom, K.B., and Shobe, C.M. (2022) Using flume experiments to test the influence of discontinuity orientation on fluvial bedrock erodibility. Oral presentation at Geological Society of America annual meeting.
  32. Colaianne, N.J., Shobe, C.M., and Chilton, K.D. (2022) Comparing modeled and measured channel geometry: Implications for the role of bedrock properties. Poster presentation atGeological Society of America annual meeting.
  33. Bower, S.J., Shobe, C.M., Maxwell, A.E., and Campforts, B. (2022) Modeling the influence of vegetation and soil properties on the surface evolution of mined lands. Poster presentation at Geological Society of America annual meeting.
  34. Shobe, C.M., Colaianne, N.J., and Chilton, K.D. (2022) Erodibility in bedrock rivers: A tricky mix of material properties and internal landscape dynamics. Oral presentation at America annual meeting (Invited).
  35. Shobe, C.M., Braun, J., Yuan, X.P., Campforts, B., Gailleton, B., Baby, G., Guillocheau, F., and Robin, C. (2022) Into the abyss: Passive margin stratigraphy reveals seascape evolution processes. Oral presentation at Geological Society of America annual meeting. abstract | slides
  36. Campforts, B., Shobe, C.M., Overeem, I., and Tucker, G.E. (2022) The role of landslides in shaping topography and controlling sediment dynamics. Abstract submitted to Geological Society of America annual meeting.
  37. Shobe, C.M., Braun, J., Yuan, X.P., Campforts, B., Gailleton, B., Baby, G., Guillocheau, F., and Robin, C. (2022) Inverting passive margin stratigraphy for marine sediment transport dynamics over geologic time. Poster presented at Community Surface Dynamics Modeling System annual meeting. abstract | poster

    38. 2021

  38. Huntington, K.W., Morey, S., Turzewski, M., Lang, K., Mueller, M., Montgomery, D., Licht, A., Goodbred, S., Pickering, J., Diamond, M., and Shobe, C.M. (2021) Impact of Tibetan lake outburst floods on erosion, morphology, and sedimentary record of the eastern Himalaya from source to sink. Oral presentation at American Geophysical Union annual meeting (Invited).
  39. Campforts, B., Shobe, C.M., Overeem, I., and Tucker, G.E. (2021) How do landslides alter landscape evolution? Insights from numerical experiments and topographic analysis. Oral presentation at American Geophysical Union annual meeting.
  40. Glade, R.C., Shobe, C.M., Turowski, J.M., Nativ, R., Bennett, G.L., and Dini, B. (2021) Progress in boulder-mantled landscapes: A Sisyphean challenge. Poster presented at American Geophysical Union annual meeting.
  41. Shobe, C.M., Campforts, B., and Bower, S.J. (2021) The uncertain future of landscapes subjected to mountaintop removal mining. Oral presentation at Geological Society of America annual meeting.
  42. Shobe, C.M., Turowski, J.M., Nativ, R., Glade, R.C., Bennett, G.L., and Dini, B. (2021) Great big boulders and landscape self-organization. Poster presented at Geological Society of America annual meeting. abstract | poster
  43. Shobe, C.M., Braun, J., Yuan, X.P., Campforts, B., Baby, G., Guillocheau, F., and Robin, C. (2021) Inversion of marine stratigraphy for optimal seascape evolution model structure and parameters. Poster presentation at Community Surface Dynamics Modeling System annual meeting. abstract | poster

    44. 2020

  44. Shobe, C.M., Braun, J., Yuan, X.P., Campforts, B., Baby, G., Guillocheau, F., and Robin, C. (2020) Inverting stratigraphy for marine sediment transport dynamics over geologic time: Examples from the Orange Basin, southern Africa. Poster presentation at American Geophysical Union annual meeting. abstract
  45. Campforts, B., Shobe, C.M., Overeem, I., Vanmaercke, M., Hutton, E.W.H., Braun, J., and Tucker, G.E. (2020) The impact of landslides on sediment dynamics, fluvial bedrock incision and steady-state topography. eLightning talk at American Geophysical Union annual meeting.
  46. Yuan, X.P., Guerit, L., Braun, J., Rouby, D., and Shobe, C.M. (2020) Fluvial cut-and-fill terraces record climate oscillations. Poster presentation at American Geophysical Union annual meeting.
  47. Tucker, G.E., Barnhart, K.R., Doty, S.G., Glade, R.C., Shobe, C.M., Rossi, M.W., and Hill, M.C. (2020) Ensemble forecasting of long-term erosion at a hazardous waste site. Oral presentation at American Geophysical Union annual meeting.
  48. Barnhart, K.R., Tucker, G.E., Doty, S.G., Glade, R.C., Shobe, C.M., Rossi, M.W., and Hill, M.C. (2020) Lessons and challenges in reproducible computational research from the development and application of landscape evolution models to waste site remediation. Poster presentation at American Geophysical Union annual meeting.
  49. Shobe, C.M., Vrouwenvelder, K.T., Moerchen, M., and Giampoala, M. (2020) Geobites: Grassroots training for the next generation of geoscience writers. Poster presentation at American Geophysical Union annual meeting. abstract
  50. Shobe, C.M., Braun, J., Yuan, X.P., Campforts, B., Baby, G., Guillocheau, F., and Robin, C. (2020) Refining predictive models for passive margin stratigraphy by inverting the sedimentary record. Oral presentation at Geological Society of America annual meeting. abstract | slides
  51. Shobe, C.M., Bennett, G.L., Tucker, G.E., Roback, K., Miller, S.R., and Roering, J.J. (2020) Disassembling California: Does lithology-dependent boulder delivery to rivers influence landscape response to tectonics? Oral presentation at Geological Society of America annual meeting. abstract | slides
  52. Campforts, B., Shobe, C.M., Hutton, E.W.H., and Tucker, G.E. (2020) Will it slide? Explicit integration of landslides and sediment dynamics in Landlab. Remote talk at International Environmental Modelling and Software Society annual meeting.
  53. Shobe, C.M., Braun, J., Yuan, X.P., Campforts, B., Guillocheau, F., and Robin, C. (2020) Toward a unified model for sediment transport from terrestrial source to abyssal-plain sink. Virtual display presented at European Geosciences Union annual meeting. abstract | poster
  54. Campforts, B., Shobe, C.M., Steer, P., Lague, D., Vanmaercke, M., and Braun, J. (2020) To slide or not to slide: explicit integration of landslides and sediment dynamics in a landscape evolution model. Virtual display presented at European Geosciences Union annual meeting.
  55. Glade, R.C., Shobe, C.M., Anderson, R.S., and Tucker, G.E. (2020) River canyon evolution governed by autogenic channel-hillslope feedbacks. Virtual display presented at European Geosciences Union annual meeting.
  56. Shobe, C.M., Vrouwenvelder, K.T., Moerchen, M., and Giampoala, M. (2020) Geobites: Down-to-earth summaries of new geoscience research for a broad audience. Virtual display presented at European Geosciences Union annual meeting. abstract | poster

    57. 2019

  57. Shobe, C.M., Bennett, G.L., Tucker, G.E., Roback, K., Miller, S.R., and Roering, J.J. (2019) Disassembling California: Boulders as a lithologic control on river and landscape evolution at the Mendocino triple junction. Oral presentation at American Geophysical Union annual meeting. abstract | slides
  58. Glade, R.C., Shobe, C.M., Anderson, R.S., and Tucker, G.E. (2019) How do channel-hillslope feedbacks modulate river canyon evolution? Oral presentation at American Geophysical Union annual meeting. (Invited)
  59. Barnhart, K.R., Tucker, G.E., Doty, S.G., Shobe, C.M., Glade, R.C., Rossi, M.W., and Hill, M.C. (2019) The importance and challenge of thresholds in calibrating landscape evolution models. Oral presentation at American Geophysical Union annual meeting.
  60. Bennett, G.L., Shobe, C.M., Tucker, G.E., Roback, K., Miller, S.R., and Roering, J.J. (2019) Boulder prevalence as a basin-scale lithologic control on river and landscape evolution in northern California, USA. Oral presentation at British Society for Geomorphology annual meeting.
  61. Tucker, G.E., Barnhart, K.R., Doty, S.G., Glade, R.C., Hill, M.C., Rossi, M.W., and Shobe, C.M. (2019) Testing long-term channel network incision models using a natural experiment in postglacial landscape evolution. Oral presentation at River, Coastal, and Estuarine Morphodynamics Symposium.
  62. Barnhart, K.R., Glade, R.C., Shobe, C.M., and Tucker, G.E. (2019) Multi-model comparison in long-term drainage evolution: Introducing terrainbento 1.0. Oral presentation at River, Coastal, and Estuarine Morphodynamics Symposium.
  63. Barnhart, K.R., Tucker, G.E., Doty, S., Glade, R.C., Shobe, C.M., Rossi, M.W., and Hill, M.C. (2019) Projections of erosion for a temperate watershed on a 10,000 year timescale. Oral presentation at Goldschmidt conference.
  64. Shobe, C.M., Bennett, G.L., Tucker, G.E., Roback, K., Miller, S.R., and Roering, J.J. (2019) Assessing basin-scale lithologic controls on river and landscape evolution. Poster presented at Community Surface Dynamics Modeling System annual meeting. abstract | poster
  65. Glade, R.C., Shobe, C.M., Anderson, R.S., and Tucker, G.E. (2019) Canyon evolution governed by channel-hillslope feedbacks. Poster presented at Community Surface Dynamics Modeling System annual meeting. abstract
  66. Barnhart, K.R., Glade, R.C., Shobe, C.M., and Tucker, G.E. (2019) terrainbento 1.0: a multi-model package for long-term drainage basin evolution. Poster presented at Community Surface Dynamics Modeling System annual meeting. abstract
  67. Shobe, C.M., Glade, R.C., Anderson, R.S., and Tucker, G.E. (2019) Chaotic chasms: River canyon evolution governed by channel-hillslope feedbacks. Oral presentation at CU Hydrologic Sciences Symposium. slides

    68. 2018

  68. Shobe, C.M., Tucker, G.E., and Rossi, M.W. (2018) Variable thresholds in rivers: Causes and effects. Oral presentation at American Geophysical Union annual meeting (Invited). abstract | slides
  69. Shobe, C.M., Glade, R.C., Tucker, G.E., and Anderson, R.S. (2018) Chaotic chasms: Canyon evolution governed by autogenic channel-hillslope feedbacks. Poster presented at American Geophysical Union annual meeting. abstract | poster
  70. Barnhart, K.R., Tucker, G.E., Doty, S., Hill, M.C., Rossi, M.W., Shobe, C.M., and Glade, R.C. (2018) Inverting topography for landscape evolution model process representation. Oral presentation at American Geophysical Union annual meeting. abstract
  71. Barnhart, K.R., Tucker, G.E., Doty, S., Hill, M.C., Rossi, M.W., Shobe, C.M., and Glade, R.C. (2018) Uncertainty in the prediction of erosion on geologic time scales. Oral presentation at International Conference on Environmental Modelling and Software.
  72. Shobe, C.M. and Glade, R.C. (2018) Modeling the 2-D evolution of blocky landscapes: Hillslope-channel interactions. Poster presented at Community Surface Dynamics Modeling System annual meeting. abstract | poster
  73. Glade, R.C. and Shobe, C.M. (2018) Modeling the 2-D evolution of blocky landscapes: Coupled model design. Poster presented at Community Surface Dynamics Modeling System annual meeting. abstract | poster
  74. Shobe, C.M., Tucker, G.E., and Barnhart, K.R. (2018) Exploring river response to tectonic perturbations with the open source 2-D SPACE model. Poster presented at Coupling of Tectonic and Surface Processes Workshop. abstract | poster
  75. Glade, R.C. and Shobe, C.M. (2018) Baselevel signal propagation through a block-controlled landscape. Poster presented at Coupling of Tectonic and Surface Processes Workshop.
  76. Bennett, G.L. and Shobe, C.M. (2018) The constant struggle between earthflows and rivers in northern California. Oral presentation at European Geophysical Union annual meeting. abstract

    77. 2017

  77. Shobe, C.M., Tucker, G.E., and Rossi, M.W. (2017) The influence of hillslope-derived blocks on erosion rate-channel steepness scaling: Emergence of variable threshold behavior. Oral presentation at American Geophysical Union annual meeting. abstract | slides
  78. Shobe, C.M., Tucker, G.E., and Rossi, M.W. (2017) Variable thresholds in mountain rivers imposed by hillslope-derived blocks. Oral presentation at Geological Society of America annual meeting. abstract | slides
  79. Shobe, C.M., Tucker, G.E., and Barnhart, K.R. (2017) Exploring river response to tectonic perturbations with the open source 2-D SPACE model. Poster presented at Geological Society of America annual meeting. abstract | poster
  80. Hancock, G.S., Shobe, C.M., Eppes, M.C., and Small, E.E. (2017) Field evidence for the influence of weathering on rock erodibility and channel form in bedrock rivers. Oral presentation at Geological Society of America annual meeting. abstract
  81. Tucker, G.E., Barnhart, K.R., Glade, R.C., Shobe, C.M., Doty, S.G., and Hill, M.C. (2017) Using a natural experiment in post-glacial landscape evolution as a testbed for comparing alternative geomorphic model formulations. Oral presentation at CUAHSI Conference on Hydroinformatics.
  82. Shobe, C.M., Tucker, G.E., and Rossi, M.W. (2017) Hillslope-derived blocks, erosion thresholds, and topographic scaling in mountain rivers. Poster presented at Community Surface Dynamics Modeling System annual meeting. abstract | poster

    83. 2016

  83. Shobe, C.M. and Tucker, G.E. (2016) When hillslope-derived blocks alter river evolution: A sensitivity analysis. Poster presented at American Geophysical Union annual meeting. abstract | poster
  84. Hancock, G.S., Huettenmoser, J., Shobe, C.M., and Eppes, M.C. (2016) Rock erodibility as a dynamic variable driven by the interplay between erosion and weathering in bedrock channels: Examples from Great Falls, Virginia, USA. Poster presented at American Geophysical Union annual meeting. abstract
  85. Shobe, C.M. and Tucker, G.E. (2016) Experimental study of the influence of large blocks on fluvial response to baselevel fall. Oral presentation given at Geological Society of America annual meeting. abstract
  86. Schoenfeld, T.E.*, Shobe, C.M., and Tucker, G.E. (2016) Processes affecting spatial variability in sediment size at Chalk Creek, Colorado. Poster presented at Geological Society of America annual meeting. abstract
  87. Shobe, C.M., Tucker, G.E., and Anderson, R.S. (2016) Dynamic feedbacks between hillslope-derived blocks and transient channel evolution. Poster presented at Binghampton Geomorphology Symposium. poster
  88. Shobe, C.M., Tucker, G.E., and Anderson, R.S. (2016) Boulders and bedrock: Modeling dynamic feedbacks between hillslope-derived blocks and transient channel evolution. Poster presented at Community Surface Dynamics Modeling System annual meeting. abstract | poster
  89. Shobe, C.M., Tucker, G.E., and Anderson, R.S. (2016) Big blocks and river incision: A numerical modeling perspective. Oral presentation given at CU Hydrologic Sciences Symposium. CU Hydrologic Sciences Outstanding Oral Presentation Award winner. slides

    90. 2015

  90. Shobe, C.M., Tucker, G.E., and Anderson, R.S. (2015) Big blocks and river incision: A numerical modeling perspective. Poster presented at American Geophysical Union annual meeting. AGU Outstanding Student Paper Award winner. abstract | poster
  91. Sato, M.M.*, Shobe, C.M., and Tucker, G.E. (2015) The influence of hillslope steepness on sediment supply size distribution along rivers draining the Colorado Front Range. Poster presented at American Geophysical Union annual meeting. abstract
  92. Shobe, C.M. and Tucker, G.E. (2015) How might sediment size heterogeneity influence river incision? Oral presentation given at Geological Society of America annual meeting. abstract | slides
  93. Shobe, C.M., Sato, M.M.*, and Tucker, G.E. (2015) Bigger than bedload: Size distribution, residence time, and channel evolution implications for bedrock blocks in rapidly incising rivers. Robert K. Fahnestock award poster, Geological Society of America annual meeting. poster
  94. Shobe, C.M., Hancock, G.S., Eppes, M.C., and Small, E.E. (2015) Evaluating the influence of feedbacks between erosion rate and weathering on the distribution of erodibility in bedrock river channels. Poster presented at Geological Society of America annual meeting. abstract | poster
  95. Shobe, C.M., Tucker, G.E., and Anderson, R.S. (2015) A new framework for modeling the effects of sediment size distribution on fluvial erosion: Theory and a case study. Poster presented at the Summer Institute for Earth Surface Dynamics. poster

    96. 2014

  96. Shobe, C.M., Hancock, G.S., Eppes, M.C., and Small, E.E. (2014) The influence of weathering on the spatial distribution of erodibility in bedrock river channels. Oral presentation given at Geological Society of America annual meeting. abstract | slides
  97. Shobe, C.M., Kee, S.C., and Hancock, G.S. (2014) Spatially variable rock erodibility in bedrock channels undergoing transient response to baselevel change, Great Falls area, Virginia. Poster presented at Geological Society of America southeastern section meeting. abstract | poster

    98. 2013

  98. Shobe, C.M., Hancock, G.S., and Small, E.E. (2013) Spatially variable rock erodibility related to the interaction between erosion rate and weathering in bedrock-floored channels, Great Falls area, Virginia. Poster presented at Geological Society of America annual meeting. abstract | poster