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- Marine Geophysical Surveying
- Oceanographic & Environmental Instrumentation
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- Sediment Sampling Devices
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The cliffs exposed along the canal exhibit (reveals) a series of marine transgressive cycles bounded by unconformity surfaces. (Collier 1990, Collier et al 1992)
Each transgressive cycle consists of marls, sandstones and conglomerates representing offshore, shoreface and beachface environments. Five marine transgressive cycles are identified in the northwestern half of the canal section to a height of 90m above present sea level. Dating of the transgressive cycles indicate that the first four cycle can be correlated with principal late Pleistocene – Holocene glacio– eustatic transgressive peaks of 100.000 years periodicity. That is from the present coastline which corresponds IOS 1 to the next three corresponding to OIS 5, 7 and 9.
Based on the dating of the transgressive cycles, their height above present day sea-level and the height of the sea- level during the time of their formation by reference to the late Quaternary sea-level curve the average minimum uplift rate across the time interval since their formation is 0.3 mm/year.
Corinth Marine Terraces
South of the Corinth town the landscape is dominated by a series of uphill climping steps each of which corresponds to a marine terrace. (Keraudren and Sorel 1987, Armijo et al 1996) The terraces are capped with marine sediments and correspond to high sea-level periods. The isotopic stages given by Imbrie et al 1984 are used by Keraudren and Sorel (1987) to name them. The terraces observed were from the eldest to the youngest, the following: 9.3, 7.5, 7.3, 7.1, 5.5 and 1 (Holocene). The 9.3, 7.1, 5.5 and 1 correspond to the major sea-level highstands, whilst the others correspond to subordinate highstands. The altitude versus age curves based on this correlation show a decrease of the uplift rate with time.