Micro-erosion meter measurements of rock wear on the Otway coast of southeast Australia

Gill, Edmund D.; Lang, Jeff

doi:10.1016/0025-3227(83)90025-7

Cited by 77 publications

(45 citation statements)

References 4 publications

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“…The value for biocalcarenite downwearing measured in our work is similar to that observed by several other authors for limestone in shore platforms between 0.034 and 0.400 mm year − 1 (Neves et al, 2001, Cucchi et al, 2006, Swantesson et al, 2006a, Furlani et al, 2010 whereas lowering rates in calcarenite and siltstone fall within values reported by other works for detrital rocks: (i) siltstone: 1.8 mm/year − 1 (Gill and Lang, 1983), (ii) sandstone: 1.254 mm/year − 1 (Porter et al, 2010), and (iii) greywacke: 0.300-0.405 mm/year − 1 (Gill and Lang, 1983). That difference between carbonate and more detrital rocks is likely to be related to mass properties like fabric and porosity.…”

Section: Discussionsupporting

confidence: 92%

“…To further investigate the importance of porosity, we parameterized data from our study and from other published data (Gill and Lang, 1983;Spencer, 1985;Stephenson and Kirk, 1998;Neves et al, 2001;Andrade et al, 2002;Swantesson et al, 2006a;Blanco-Chao et al, 2007;Stephenson et al, 2010) concerning rock texture, instead of grouping them in the conventional way by lithological composition. Our parameter attribution was based on general concepts such as: (i) crystalline rocks are less porous than sedimentary rocks; (ii) finegrained rocks are less permeable than coarse-grained sedimentary rocks; and (iii) the texture of rocks with large fossils is more heterogeneous (i.e., more porous) than those containing microfossils.…”

Section: Discussionmentioning

confidence: 99%

“…Both the micro-erosion meter (MEM), and its variant the transverse micro erosion meter (TMEM), have frequently been used to estimate downwearing rates on shore platforms (e.g., Robinson, 1976;Gill and Lang, 1983;Stephenson and Kirk, 1996;Stephenson and Thornton, 2005;Trenhaile and Porter, 2007;Stephenson et al, 2010). As Stephenson and Finlayson (2009) concluded in their review on the use of micro-erosion meters, MEMs provide data that contribute to better knowledge about erosion rates over short time and small spatial scales.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Downwearing rates on shore platforms of different calcareous lithotypes

Moura¹,

Gabriel²,

Ramos-Pereira³

et al. 2011

Marine Geology

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Downwearing rates on shore platforms of different calcareous lithotypes

Moura¹,

Gabriel²,

Ramos-Pereira³

et al. 2011

Marine Geology

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“…Erosion rates on shore platforms and supra-tidal rock outcrops have been reported as vertical rates of surface lowering using either the micro-erosion meter (MEM) or the traversing micro-erosion meter, (TMEM) (Trudgill, 1976a,b;Robinson, 1977a,b;Kirk, 1977;Spencer, 1981;Gill and Lang, 1983;Viles and Trudgill, 1984;Spencer, 1985;Mottershead, 1989;Kirk, 1996, 1998;Stephenson and Thornton, 2005). These studies have occurred over timescales of months or years.…”

Section: Introductionmentioning

confidence: 99%

Two‐hourly surface change on supra‐tidal rock (Marengo, Victoria, Australia)

Gómez-Pujol

Stephenson

Fornós

2006

Earth Surf Processes Landf

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A traversing micro-erosion meter was used to measure rock surface micro-topography over 40 cm 2 on a supra-tidal cliff face from early morning to late evening in late spring. From 06:00 hours to 22:00 hours the relative heights of 188 coordinates were obtained using the meter at 2-hour intervals, resulting in a data set of 1607 readings. Monitoring shows that rock surfaces are dynamic entities, with significant rise and fall relative to the first measurement at shorter timescales than previously reported. The maximum positive rise between readings was 0·261 mm and lowering was 0·126 mm. The pattern of change did not relate as expected to environmental variables such as temperature or insolation. Rather, the surface showed greater surface change in the early morning and late afternoon. It is hypothesized that this pattern relates to the expansion and contraction of lichen thalli as moisture is absorbed during higher humidity in the morning and late afternoon. The implications of these results for weathering studies are considered.

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“…The gauge and probe sit on a low, triangular frame that, in use, is positioned on three metal bolts (a MEM station) permanently embedded in the rock surface (High and Hanna, 1970;Robinson, 1976). The instrument allows precise measurements to be made of slow rock downwearing (erosion in the vertical plane) and several workers have used it in the supra-and intertidal zones of rocky coasts (Kirk, 1977;Robinson, 1977;Gill and Lang, 1983;Mottershead, 1989;Stephenson and Kirk, 1998;Foote et al, 2001;Andrade et al, 2002). Unlike the MEM, which allows only three measurements to be made at each station, a traversing micro-erosion meter (TMEM) permits numerous measurements to be made within the triangular frame of the instrument (Trudgill et al, 1981;Stephenson, 1997).…”

Section: Fieldmentioning

confidence: 99%

Shore Platform Processes in Eastern Canada

Trenhaile

Porter

Kanyaya

2007

gpq

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This research is conducted on a mesotidal, argillite shore platform at Mont Louis in Gaspé, Québec, and on macrotidal platforms in the basalts of Scots Bay and the sandstones of Burncoat Head in Nova Scotia. Rock samples have been subjected to wetting and drying and to salt weathering cycles. The platforms were surveyed; rock hardness was determined with a Rock Test Hammer; waves were recorded in the field; and downwearing rates were measured at 56 micro-erosion meter stations over 1 to 3 years. Weathering is the dominant process at Mont Louis, although the horizontal platform may have been cut by waves at the high tidal level. Wave backwearing was much more important than downwearing by weathering during the Holocene at Scots Bay. Wave quarrying only occurs on a few scarps today, however, and without much abrasive material, slow downwearing now dominates over most of the platform surface. Waves probably help to remove loosened sand grains at Burncoat Head, thereby contributing to platform downwearing. Abrasion is also important in places, but the data suggest that backwearing by wave quarrying and probably frost has been a little more important than downwearing by abrasion and weathering during the Holocene.Processus des plates-formes littorales de l’est du Canada. Une plate-forme littorale d’argilites soumise à des marées modérées à Mont Louis en Gaspésie, Québec, et des plates-formes soumises à des fortes marées dans les basaltes de Scots Bay et les grès de Burncoat Head de la Nouvelle-Écosse furent étudiées. Des échantillons de roches ont été soumis à des cycles de mouillage et de séchage et d’haloclastie. Le profil des plates-formes a été mesuré, la dureté des roches a été établie par le test du marteau de Schmidt, les vagues ont été mesurées sur le terrain et le taux d’usure vertical a été quantifié à 56 stations avec des appareils détectant la micro-érosion, le tout sur une période d’un à trois ans. L’altération est le processus dominant à Mont Louis, bien que la plate-forme horizontale ait été entaillée par les vagues au maximum des marées hautes. L’usure horizontale par les vagues était plus importante que l’usure verticale par altération durant l’Holocène à Scots Bay. L’extraction de grands blocs par les vagues ne se produit toutefois de nos jours que sur quelques abrupts et, en l’absence de matériel abrasif, une lente usure verticale domine maintenant sur la plupart des plates-formes. Les vagues ont probablement aidé à éliminer les grains de sable produits par l’altération à Burncoat Head, contribuant ainsi à l’usure verticale de la plate-forme. L’abrasion est également importante à certains endroits, mais les données indiquent que l’usure horizontale par les vagues, et aussi par le gel, a été un peu plus importante que l’usure verticale par l’abrasion et l’altération durant l’Holocène

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Micro-erosion meter measurements of rock wear on the Otway coast of southeast Australia

Cited by 77 publications

References 4 publications

Downwearing rates on shore platforms of different calcareous lithotypes

Downwearing rates on shore platforms of different calcareous lithotypes

Two‐hourly surface change on supra‐tidal rock (Marengo, Victoria, Australia)

Shore Platform Processes in Eastern Canada

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