Articles | Volume 11, issue 3
https://doi.org/10.5194/esurf-11-429-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-11-429-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| Highlight paper
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10 May 2023
Research article | Highlight paper |
| 10 May 2023
| 10 May 2023
Constraints on long-term cliff retreat and intertidal weathering at weak rock coasts using cosmogenic 10Be, nearshore topography and numerical modelling
Jennifer R. Shadrick
Earth Science and Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
Earth Science and Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
Martin D. Hurst
CORRESPONDING AUTHOR
School of Geographical and Earth Sciences, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
Matthew D. Piggott
Earth Science and Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
Klaus M. Wilcken
Institute for Environmental Research (IER), Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW 2234, Australia
Alexander J. Seal
Earth Science and Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
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Cited articles
Adams, B. M., Eldred, M. S., Geraci, G., Hooper, R. W., Jakeman, J. D., Maupin, K. A., Monschke, J. A., Rushdi, A. A., Stephens, J. A., Swiler, L. P., Wildey, T. M., Bohnhoff, W. J., Dalbey, K. R., and Ebeida, M. S.: Dakota, A Multilevel Parallel Object-Oriented Framework for Design Optimization, Parameter Estimation, Uncertainty Quantification, and Sensitivity Analysis: Version 6.10 User's Manual, Sandia National Laboratories [software], SAND2014-4633, https://dakota.sandia.gov/content/manuals (last access: 23 April 2023), 2019.
Andrews, C. E.: The measurement of the erosion of the chalk shore platform of East Sussex, the effect of coastal defence structures and the efficacy of macro scale bioerosive agents, PhD thesis, University of Sussex, https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340824 (last access: 23 April 2023), 2001.
Barlow, J., Gilham, J., and Ibarra Cofrã, I.: Kinematic analysis of sea cliff stability using UAV photogrammetry, Int. J. Remote Sens., 38, 2464–2479, https://doi.org/10.1080/01431161.2016.1275061, 2017.
Bradley, S. L., Milne, G. A., Shennan, I., and Edwards, R.: An improved glacial isostatic adjustment model for the British Isles, J. Quaternary Sci., 26, 541–552, https://doi.org/10.1002/jqs.1481, 2011.
Braucher, R., Bourlès, D., Merchel, S., Vidal Romani, J., Fernadez-Mosquera, D., Marti, K., Léanni, L., Chauvet, F., Arnold, M., Aumaître, G., and Keddadouche, K.: Determination of muon attenuation lengths in depth profiles from in situ produced cosmogenic nuclides, Nucl. Instrum. Meth. Phys. Res. B, 294, 484–490, https://doi.org/10.1016/j.nimb.2012.05.023, 2013.
Buchanan, D. H., Naylor, L. A., Hurst, M. D., and Stephenson, W. J.: Erosion of rocky shore platforms by block detachment from layered stratigraphy, Earth Surf. Proc. Land., 45, 1028–1037, https://doi.org/10.1002/esp.4797, 2020.
Channel Coastal Observatory: https://coastalmonitoring.org/cco/, last access: 1 December 2021.
Choi, K. H., Seong, Y. B., Jung, P. M., and Lee, S. Y.: Using Cosmogenic 10Be Dating to Unravel the Antiquity of a Rocky Shore Platform on the West Coast of Korea, J. Coastal Res., 28, 641–657, https://doi.org/10.2112/JCOASTRES-D-11-00087.1, 2012.
Corbett, L. B., Bierman, P. R., and Rood, D. H.: An approach for optimizing in situ cosmogenic 10Be sample preparation, Quat. Geochronol., 33, 24–34, https://doi.org/10.1016/j.quageo.2016.02.001, 2016.
Costa, S., Lageat, Y., and Hénaff, A.: The gravel beaches of north-west France and their contribution to the dynamic of the coastal cliff-shore platform system, Ann. Geomorphol. 144, 199–214, 2006.
Dickson, M. E.: Shore platform development around Lord Howe Island, southwest Pacific, Geomorphology, 76, 295–315, https://doi.org/10.1016/j.geomorph.2005.11.009, 2006.
Digimap: https://digimap.edina.ac.uk/, last access: 1 December 2021.
Dornbusch, U. and Robinson, D. A.: Block removal and step backwearing as erosion processes on rock shore platforms: a preliminary case study of the chalk shore platforms of south-east England, Earth Surf. Proc. Land., 36, 661–671, https://doi.org/10.1002/esp.2086, 2011.
Dornbusch, U., Robinson, D. A., Moses, C. M., and Williams, R. B. G.: Chalk coast erosion and its contribution to the shingle budget in East Sussex, Zeitschrift fur Geomorphologie, Supplementband, 144, 215–230, 2006a.
Dornbusch, U., Robinson, D. A., Moses, C., Williams, R., and Costa, S.: Retreat of Chalk cliffs in the eastern English Channel during the last century, J. Maps, 2, 71–78, https://doi.org/10.4113/jom.2006.46, 2006b.
Dornbusch, U., Robinson, D. A., Moses, C. A., and Williams, R. B. G.: Temporal and spatial variations of chalk cliff retreat in East Sussex, 1873 to 2001, Mar. Geol., 249, 271–282, https://doi.org/10.1016/j.margeo.2007.12.005, 2008.
Duguet, T., Duperret, A., Costa, S., Regard, V., and Maillet, G.: Coastal chalk cliff retreat rates during the Holocene, inferred from submarine platform morphology and cosmogenic exposure along the Normandy coast (NW France), Mar. Geol., 433, 106405, https://doi.org/10.1016/j.margeo.2020.106405, 2021.
Duperret, A., Genter, A., Martinez, A., and Mortimore, R. N.: Coastal chalk cliff instability in NW France: role of lithology, fracture pattern and rainfall, Geol. Soc. Lond. Eng. Geol. Spec. Publ., 20, 33–55, https://doi.org/10.1144/GSL.ENG.2004.020.01.03, 2004.
Duperret, A., Taibi, S., Mortimore, R. N., and Daigneault, M.: Effect of groundwater and sea weathering cycles on the strength of chalk rock from unstable coastal cliffs of NW France, Eng. Geol., 78, 321–343, https://doi.org/10.1016/j.enggeo.2005.01.004, 2005.
Earlie, C., Masselink, G., and Russell, P.: The role of beach morphology on coastal cliff erosion under extreme waves, Earth Surf. Proc. Land., 43, 1213–1228, https://doi.org/10.1002/esp.4308, 2018.
Ellis, N.: Morphology, process and rates of denudation on the chalk shore platform of East Sussex, PhD thesis, Brighton Polytechnic, https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372983 (last access: 23 April 2023), 1986.
Estacio-Hiroms, K. C., Prudencio, E. E., Malaya, N. P., Vohra, M., and McDougall, D.: The QUESO Library, User's Manual, arXiv [preprint], https://doi.org/10.48550/arXiv.1611.07521, 2016.
Foote, Y., Plessis, E., Robinson, D., Hénaff, A., and Costa, S.: Rates and patterns of downwearing of chalk shore platforms of the Channel: comparisons between France and England, Ann. Geomorphol., 144, 93–115, 2006.
Gelman, A., Gilks, W. R., and Roberts, G. O.: Weak convergence and optimal scaling of random walk Metropolis algorithms, Ann. Appl. Probab., 7, 110–120, https://doi.org/10.1214/aoap/1034625254, 1997.
Gilham, J., Barlow, J., and Moore, R.: Detection and analysis of mass wasting events in chalk sea cliffs using UAV photogrammetry, Eng. Geol., 250, 101–112, https://doi.org/10.1016/j.enggeo.2019.01.013, 2019.
Gosse, J. C. and Phillips, F. M.: Terrestrial in situ cosmogenic nuclides: theory and application, Quaternary Sci. Rev., 20, 1475–1560, https://doi.org/10.1016/S0277-3791(00)00171-2, 2001.
Henaff, A., Lageat, Y., and Costa, S.: Geomorphology and shaping of Chalk shore platforms of the Channel coasts, Z. Geomorphol., 61, 144–146, 2006.
Himmelstoss, E. A., Henderson, R. E., Kratzmann, M. G., and Farris, A. S.: Digital Shoreline Analysis System (DSAS) version 5.0 user guide, U. S. Geological Survey, Reston, VA, https://doi.org/10.3133/ofr20181179, 2018.
Hoek, E. and Brown, E. T.: Practical estimates of rock mass strength, Int. J. Rock Mech. Min., 34, 1165–1186, https://doi.org/10.1016/S1365-1609(97)80069-X, 1997.
Hurst, M., Matsumoto, H., Shadrick, J. R., Rood, D. H., and Dickson, M. E.: mdhurst1/Rocky-Profile-Model: RPM-CRN with Dakota Implementation v1.0, Zenodo [code], https://doi.org/10.5281/zenodo.5645478, 2021.
Hurst, M. D., Rood, D. H., Ellis, M. A., Anderson, R. S., and Dornbusch, U.: Recent acceleration in coastal cliff retreat rates on the south coast of Great Britain, P. Natl. Acad. Sci. USA, 113, 13336–13341, https://doi.org/10.1073/pnas.1613044113, 2016.
Hurst, M. D., Rood, D. H., and Ellis, M. A.: Controls on the distribution of cosmogenic 10Be across shore platforms, Earth Surf. Dynam., 5, 67–84, https://doi.org/10.5194/esurf-5-67-2017, 2017.
Jonah, F. E., Boateng, I., Osman, A., Shimba, M. J., Mensah, E. A., Adu-Boahen, K., Chuku, E. O., and Effah, E.: Shoreline change analysis using end point rate and net shoreline movement statistics: An application to Elmina, Cape Coast and Moree section of Ghana's coast, Reg. Stud. Mar. Sci., 7, 19–31, https://doi.org/10.1016/j.rsma.2016.05.003, 2016.
Kennedy, D. M., Paulik, R., and Dickson, M. E.: Subaerial weathering versus wave processes in shore platform development: reappraising the Old Hat Island evidence, Earth Surf. Proc. Land., 36, 686–694, https://doi.org/10.1002/esp.2092, 2011.
Kennedy, D. M., Stephenson, W. J., and Naylor, L. A.: Chapter 1 Introduction to the rock coasts of the world, Geol. Soc. Lond. Mem., 40, 1–5, https://doi.org/10.1144/M40.1, 2014.
Kohl, C. P. and Nishiizumi, K.: Chemical isolation of quartz for measurement of in-situ-produced cosmogenic nuclides, Geochim. Cosmochim. Ac., 56, 3583–3587, https://doi.org/10.1016/0016-7037(92)90401-4, 1992.
Limber, P. W. and Murray, A. B.: Beach and sea-cliff dynamics as a driver of long-term rocky coastline evolution and stability, Geology, 39, 1147–1150, https://doi.org/10.1130/G32315.1, 2011.
Matsumoto, H., Dickson, M. E., and Kench, P. S.: An exploratory numerical model of rocky shore profile evolution, Geomorphology, 268, 98–109, https://doi.org/10.1016/j.geomorph.2016.05.017, 2016.
Matsumoto, H., Dickson, M. E., and Kench, P. S.: Modelling the relative dominance of wave erosion and weathering processes in shore platform development in micro- to mega-tidal settings, Earth Surf. Proc. Land., 43, 2642–2653, https://doi.org/10.1002/esp.4422, 2018.
Mellett, C. L. and Plater, A. J.: Drowned Barriers as Archives of Coastal-Response to Sea-Level Rise, in: Barrier Dynamics and Response to Changing Climate, edited by: Moore, L. J. and Murray, A. B., Springer International Publishing, Cham, 57–89, https://doi.org/10.1007/978-3-319-68086-6_2, 2018.
Metropolis, N., Rosenbluth, A. W., Rosenbluth, M. N., Teller, A. H., and Teller, E.: Equation of State Calculations by Fast Computing Machines, J. Chem. Phys., 21, 1087–1092, https://doi.org/10.1063/1.1699114, 1953.
Mortimore, R. N.: Upper Cretaceous Chalk in the North and South Downs, England: a correlation, P. Geologist. Assoc., 98, 77–86, https://doi.org/10.1016/S0016-7878(87)80022-6, 1987.
Mortimore, R. N., Wood, C. J., and Gallois, R. W.: British Upper Cretaceous stratigraphy, JNCC – Joint Nature Conservation Committee, UK, 23, 2001.
Mortimore, R. N., Lawrence, J., Pope, D., Duperret, A., and Genter, A.: Coastal cliff geohazards in weak rock: the UK Chalk cliffs of Sussex, Geol. Soc. Lond. Eng. Geol. Spec. Publ., 20, 3–31, https://doi.org/10.1144/GSL.ENG.2004.020.01.02, 2004a.
Mortimore, R. N., Stone, K. J., Lawrence, J., and Duperret, A.: Chalk physical properties and cliff instability, Geol. Soc. Lond. Eng. Geol. Spec. Publ., 20, 75–88, https://doi.org/10.1144/GSL.ENG.2004.020.01.05, 2004b.
Moses, C. and Robinson, D.: Chalk coast dynamics: Implications for understanding rock coast evolution, Earth-Sci. Rev., 109, 63–73, https://doi.org/10.1016/j.earscirev.2011.08.003, 2011.
Mottershead, D. N.: Rates and patterns of bedrock denudation by coastal salt spray weathering: A seven-year record, Earth Surf. Proc. Land., 14, 383–398, https://doi.org/10.1002/esp.3290140504, 1989.
National Tidal and Sea Level Facility: https://www.ntslf.org/, last access: 22 March 2021.
Naylor, L. A., Coombes, M. A., and Viles, H. A.: Reconceptualising the role of organisms in the erosion of rock coasts: A new model, Geomorphology, 157–158, 17–30, https://doi.org/10.1016/j.geomorph.2011.07.015, 2012.
Naylor, L. A., Kennedy, D. M., and Stephenson, W. J.: Chapter 17 Synthesis and conclusion to the rock coast geomorphology of the world, Geol. Soc. Lond. Mem., 40, 283–286, https://doi.org/10.1144/M40.17, 2014.
Nishiizumi, K., Imamura, M., Caffee, M. W., Southon, J. R., Finkel, R. C., and McAninch, J.: Absolute calibration of 10Be AMS standards, Nucl. Instrum. Meth. B, 258, 403–413, https://doi.org/10.1016/j.nimb.2007.01.297, 2007.
Ogawa, H., Dickson, M. E., and Kench, P. S.: Wave transformation on a sub-horizontal shore platform, Tatapouri, North Island, New Zealand, Cont. Shelf Res., 31, 1409–1419, https://doi.org/10.1016/j.csr.2011.05.006, 2011.
Oppenheimer, M., Glavovic, B. C., Hinkel, J., van de Wal, R., Magnan, A. K., Abd-Elgawad, A., Cai, R., Cifuentes-Jara, M., Rica, C., DeConto, R. M., Ghosh, T., Hay, J., Islands, C., Isla, F., Marzeion, B., Meyssignac, B., Sebesvari, Z., Biesbroek, R., Buchanan, M. K., de Campos, R. S., Cozannet, G. L., Domingues, C., Dangendorf, S., Döll, P., Duvat, V. K. E., Edwards, T., Ekaykin, A., Frederikse, T., Gattuso, J.-P., Kopp, R., Lambert, E., Lawrence, J., Narayan, S., Nicholls, R. J., Renaud, F., Simm, J., Smit, A., Woodruff, J., Wong, P. P., Xian, S., Abe-Ouchi, A., Gupta, K., and Pereira, J.: Sea Level Rise and Implications for Low-Lying Islands, Coasts and Communities, in: IPCC Special Report on the Ocean and Cryosphere in a Changing Climate, 4, 321–445, https://doi.org/10.1017/9781009157964.006, 2019.
Payo, A., Hall, J. W., Dickson, M. E., and Walkden, M. J. A.: Feedback structure of cliff and shore platform morphodynamics, J. Coast. Conserv., 19, 847–859, https://doi.org/10.1007/s11852-014-0342-z, 2015.
Porter, N. J., Trenhaile, A. S., Prestanski, K., and Kanyaya, J. I.: Patterns of surface downwearing on shore platforms in eastern Canada, Earth Surf. Proc. Land., 35, 1793–1810, https://doi.org/10.1002/esp.2018, 2010a.
Porter, N. J., Trenhaile, A. S., Prestanski, K. J., and Kanyaya, J. I.: Shore platform downwearing in eastern Canada: Micro-tidal Gaspé, Québec, Geomorphology, 118, 1–12, https://doi.org/10.1016/j.geomorph.2009.10.010, 2010b.
Prémaillon, M., Regard, V., Dewez, T. J. B., and Auda, Y.: GlobR2C2 (Global Recession Rates of Coastal Cliffs): a global relational database to investigate coastal rocky cliff erosion rate variations, Earth Surf. Dynam., 6, 651–668, https://doi.org/10.5194/esurf-6-651-2018, 2018.
Regard, V., Dewez, T., Bourlès, D. L., Anderson, R. S., Duperret, A., Costa, S., Leanni, L., Lasseur, E., Pedoja, K., and Maillet, G. M.: Late Holocene seacliff retreat recorded by 10Be profiles across a coastal platform: Theory and example from the English Channel, Quat. Geochronol., 11, 87–97, https://doi.org/10.1016/j.quageo.2012.02.027, 2012.
Retallack, G. and Roering, J.: Wave-cut or water-table platforms of rocky coasts and rivers?, GSA Today, 22, 6, https://doi.org/10.1130/GSATG144A.1, 2012.
Robinson, D. A.: The Chalk Coast of Sussex, in: Landscapes and Landforms of England and Wales, edited by: Goudie, A. and Migoń, P., Springer International Publishing, Cham, 119–143, https://doi.org/10.1007/978-3-030-38957-4_7, 2020.
Rogers, H. E., Swanson, T. W., and Stone, J. O.: Long-term shoreline retreat rates on Whidbey Island, Washington, USA, Quaternary Res., 78, 315–322, https://doi.org/10.1016/j.yqres.2012.06.001, 2012.
Rood, D. H., Hall, S., Guilderson, T. P., Finkel, R. C., and Brown, T. A.: Challenges and opportunities in high-precision Be-10 measurements at CAMS, Nucl. Instrum. Meth. B, 268, 730–732, https://doi.org/10.1016/j.nimb.2009.10.016, 2010.
Rosser, N. J., Brain, M. J., Petley, D. N., Lim, M., and Norman, E. C.: Coastline retreat via progressive failure of rocky coastal cliffs, Geology, 41, 939–942, https://doi.org/10.1130/G34371.1, 2013.
Shadrick, J. R., Hurst, M. D., Piggott, M. D., Hebditch, B. G., Seal, A. J., Wilcken, K. M., and Rood, D. H.: Multi-objective optimisation of a rock coast evolution model with cosmogenic 10Be analysis for the quantification of long-term cliff retreat rates, Earth Surf. Dynam., 9, 1505–1529, https://doi.org/10.5194/esurf-9-1505-2021, 2021.
Shadrick, J. R., Rood, D. H., Hurst, M. D., Piggott, M. D., Hebditch, B. G., Seal, A. J., and Wilcken, K. M.: Sea-level rise will likely accelerate rock coast cliff retreat rates, Nat. Commun., 13, 7005, https://doi.org/10.1038/s41467-022-34386-3, 2022.
Stavrou, A., Lawrence, J. A., Mortimore, R. N., and Murphy, W.: A geotechnical and GIS based method for evaluating risk exposition along coastal cliff environments: a case study of the chalk cliffs of southern England, Nat. Hazards Earth Syst. Sci., 11, 2997–3011, https://doi.org/10.5194/nhess-11-2997-2011, 2011.
Stephenson, W. J. and Kirk, R. M.: Rates and patterns of erosion on inter-tidal shore platforms, Kaikoura Peninsula, South Island, New Zealand, Earth Surf. Proc. Land., 23, 1071–1085, https://doi.org/10.1002/(SICI)1096-9837(199812)23:12<1071::AID-ESP922>3.0.CO;2-U, 1998.
Stephenson, W. J. and Kirk, R. M.: Development of shore platforms on Kaikoura Peninsula, South Island, New Zealand, Part One: The role of waves, Geomorphology, 32, 21–41, https://doi.org/10.1016/S0169-555X(99)00061-6, 2000.
Sunamura, T.: A wave tank experiment on the erosional mechanism at a cliff base, Earth Surf. Proc. Land., 7, 333–343, https://doi.org/10.1002/esp.3290070405, 1982.
Sunamura, T.: Geomorphology of rocky coasts, John Wiley & Son Ltd, ISBN 0471917753, 1992.
Sunamura, T.: Rocky coast processes: with special reference to the recession of soft rock cliffs, P. Jpn. Acad. B-Phys., 91, 481–500, https://doi.org/10.2183/pjab.91.481, 2015.
Swirad, Z. M., Rosser, N. J., Brain, M. J., Rood, D. H., Hurst, M. D., Wilcken, K. M., and Barlow, J.: Cosmogenic exposure dating reveals limited long-term variability in erosion of a rocky coastline, Nat. Commun., 11, 3804, https://doi.org/10.1038/s41467-020-17611-9, 2020.
Trenhaile, A.: Rocky coasts – their role as depositional environments, Earth-Sci. Rev., 159, 1–13, https://doi.org/10.1016/j.earscirev.2016.05.001, 2016.
Trenhaile, A. S.: Modeling the development of wave-cut shore platforms, Mar. Geol., 166, 163–178, https://doi.org/10.1016/S0025-3227(00)00013-X, 2000.
Trenhaile, A. S.: Chapter 14 Modeling shore platforms: present status and future developments, in: Elsevier Oceanography Series, vol. 67, edited by: Lakhan, V. C., Elsevier, 393–409, https://doi.org/10.1016/S0422-9894(03)80131-9, 2003.
Trenhaile, A. S.: Modeling the role of weathering in shore platform development, Geomorphology, 94, 24–39, https://doi.org/10.1016/j.geomorph.2007.04.002, 2008.
Trenhaile, A. S.: Predicting the response of hard and soft rock coasts to changes in sea level and wave height, Climatic Change, 109, 599–615, https://doi.org/10.1007/s10584-011-0035-7, 2011.
Trenhaile, A. S.: Shore platform erosion and evolution: Implications for cosmogenic nuclide analysis, Mar. Geol., 403, 80–92, https://doi.org/10.1016/j.margeo.2018.05.005, 2018.
Trenhaile, A. S. and Kanyaya, J. I.: The Role of Wave Erosion on Sloping and Horizontal Shore Platforms in Macro- and Mesotidal Environments, J. Coastal Res., 23, 298–309, https://doi.org/10.2112/04-0282.1, 2007.
Trenhaile, A. S. and Porter, N. J.: Can shore platforms be produced solely by weathering processes?, Mar. Geol., 241, 79–92, https://doi.org/10.1016/j.margeo.2007.03.005, 2007.
Walkden, M. J. A. and Hall, J. W.: A predictive Mesoscale model of the erosion and profile development of soft rock shores, Coast. Eng., 52, 535–563, https://doi.org/10.1016/j.coastaleng.2005.02.005, 2005.
Wilcken, K. M., Fink, D., Hotchkis, M. A. C., Garton, D., Button, D., Mann, M., Kitchen, R., Hauser, T., and O'Connor, A.: Accelerator Mass Spectrometry on SIRIUS: New 6 MV spectrometer at ANSTO, Nucl. Instrum. Meth. B, 406, 278–282, https://doi.org/10.1016/j.nimb.2017.01.003, 2017.
Williams, R. B. G., Robinson, D. A., Dornbusch, U., Foote, Y. L. M., Moses, C. A., and Saddleton, P. R.: A Sturzstrom-like cliff fall on the Chalk coast of Sussex, UK, Geol. Soc. Lond. Eng. Geol. Spec. Publ., 20, 89–97, https://doi.org/10.1144/GSL.ENG.2004.020.01.06, 2004.
Young, A. P.: Decadal-scale coastal cliff retreat in southern and central California, Geomorphology, 300, 164–175, https://doi.org/10.1016/j.geomorph.2017.10.010, 2018.
Yuan, R., Kennedy, D. M., Stephenson, W. J., and Finlayson, B. L.: The multidecadal spatial pattern of erosion on sandstone shore platforms in south-eastern Australia, Geomorphology, 371, 107437, https://doi.org/10.1016/j.geomorph.2020.107437, 2020.
Editor
This paper may be of wider interest as it provides an important quantification of the rates of cliff retreat for the chalk cliff coasts of Southern England and Northern France. This is the first time we have been able to look back at this level of detail and reconstruct how this coastline has changed and retreated.
This paper may be of wider interest as it provides an important quantification of the rates of...
Short summary
This study uses a coastal evolution model to interpret cosmogenic beryllium-10 concentrations and topographic data and, in turn, quantify long-term cliff retreat rates for four chalk sites on the south coast of England. By using a process-based model, clear distinctions between intertidal weathering rates have been recognised between chalk and sandstone rock coast sites, advocating the use of process-based models to interpret the long-term behaviour of rock coasts.
This study uses a coastal evolution model to interpret cosmogenic beryllium-10 concentrations...
