Records of cosmogenic radionuclides 10Be, 26Al and 36Cl in corals: First studies on coral erosion rates and potential of dating very old corals

Lal, D.; Gallup, C. D.; Somayajulu, B.L.K.; Vacher, L.; Caffee, M. W.; Jull, A. J. T.; Finkel, Robert C.; Speed, R. C.; Winter, Amos

doi:10.1016/j.gca.2005.08.012

Cited by 14 publications

(10 citation statements)

References 53 publications

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“…On longer timescales, Purkis et al (2010)) found similar dissolution rates (F d~6 .0 × 10 −5 ) were needed to form Pleistocene karst landforms observed along the Red Sea and Arabian Gulf coasts. The mean dissolution factor calculated using cosmogenic denudation rates of MIS 5e and older corals from Barbados (Lal et al, 2005), a raised, mostly carbonate island, is 5.7 × 10 −5 assuming mean rainfall of 2.3 mm/day (HadCM3M2: LGM, Pre-Industrial; Braconnot et al, 2007).…”

Section: Subsidence and Rim Dissolution Ratesmentioning

confidence: 99%

Late Cenozoic sea level and the rise of modern rimmed atolls

Toomey

Ashton

Raymo

et al. 2016

Palaeogeography, Palaeoclimatology, Palaeoecology

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Sea-level records from atolls, potentially spanning the Cenozoic, have been largely overlooked, in part because the processes that control atoll form (reef accretion, carbonate dissolution, sediment transport, vertical motion) are complex and, for many islands, unconstrained on million-year timescales. Here we combine existing observations of atoll morphology and corelog stratigraphy from Enewetak Atoll with a numerical model to (1) constrain the relative rates of subsidence, dissolution and sedimentation that have shaped modern Pacific atolls and (2) construct a record of sea level over the past 8.5 million years. Both the stratigraphy from Enewetak Atoll (constrained by a subsidence rate of~20 m/Myr) and our numerical modeling results suggest that low sea levels (50-125 m below present), and presumably bi-polar glaciations, occurred throughout much of the late Miocene, preceding the warmer climate of the Pliocene, when sea level was higher than present. Carbonate dissolution through the subsequent sea-level fall that accompanied the onset of large glacial cycles in the late Pliocene, along with rapid highstand constructional reef growth, likely drove development of the rimmed atoll morphology we see today.Published by Elsevier B.V.

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Section: Subsidence and Rim Dissolution Ratesmentioning

confidence: 99%

Late Cenozoic sea level and the rise of modern rimmed atolls

Toomey

Ashton

Raymo

et al. 2016

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…The implication is that this is also likely to be the case for the intertidal erosion rates but those were not measured by Lal et al . (). Nonetheless their study calls into question the applicability of short‐term measures of erosion rate to longer timescales, reinforcing the importance of conducting long‐term monitoring programmes particularly on older lithologies.…”

Section: Discussionmentioning

confidence: 99%

“…The intertidal erosion average of 0.231 mm/yr measured at Phang Nga is therefore likely to be outstripped by this according to the principal used by Evelpidou et al (2012). Lal et al (2005) have used cosmogenic radionucliedes, aluminium-26 ( 26 Al) and chlorine-36 ( 36 Cl), to measure longterm subaerial erosion rates on Pleistocene reef terraces of Barbados and Puerto Rico. Their conclusion is that the subaerial rates measured over periods of up to two years on Aldabra by Trudgill (1976) and on Grand Cayman by Spencer (1985b) overestimated erosion rates by an order of magnitude when projected over the time period since the last inter-glacial period.…”

Section: Tidal Notch Development On Limestone Coasts In the Tropicsmentioning

confidence: 99%

“…Their conclusion is that the subaerial rates measured over periods of up to two years on Aldabra by Trudgill (1976) and on Grand Cayman by Spencer (1985b) overestimated erosion rates by an order of magnitude when projected over the time period since the last inter-glacial period. The implication is that this is also likely to be the case for the intertidal erosion rates but those were not measured by Lal et al (2005). Nonetheless their study calls into question the applicability of short-term measures of erosion rate to longer timescales, reinforcing the importance of conducting long-term monitoring programmes particularly on older lithologies.…”

Section: Tidal Notch Development On Limestone Coasts In the Tropicsmentioning

confidence: 99%

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Towards an improved understanding of erosion rates and tidal notch development on limestone coasts in the Tropics: 10 years of micro‐erosion meter measurements, Phang Nga Bay, Thailand

Moses

Robinson

Kázmér

et al. 2014

Earth Surf Processes Landf

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Knowledge and understanding of shore platform erosion and tidal notch development in the tropics and subtropics relies mainly on short-term studies conducted on recently deposited carbonate rocks, predominantly Holocene and Quaternary reef limestones and aeolianites. This paper presents erosion rates, measured over a ten year period on notches and platforms developed on the Permian, Ratburi limestone at Phang Nga Bay, Thailand. In so doing it contributes to informing a particular knowledge gap in our understanding of the erosion dynamics of shore platform and tidal notch development in the tropics and subtropics -notch erosion rates on relatively hard, ancient limestones measured directly on the rock surface using a microerosion meter

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“…The interactions of PCRs with atmospheric and terrestrial nuclei produce secondary cosmic rays (SCR) [3,6]. Cosmic radiation has effects on many global processes, such as: (I) formation of tropospheric aerosols, through ioninduced nucleation [7]; (II) influence on Earth's climate [8,9]; (III) influence on Earth's temperature [10]; (IV) production of cosmogenic radionuclides such as 3 H, 10 Be, 7 Be, 22 Na and 14 C, which are used in dating processes and can help in the reconstruction of past changes of cosmic rays intensity [11]; and (V) temporal modification of the global atmospheric electric field [12].…”

Section: Introductionmentioning

confidence: 99%