%0 Journal Article
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@nexthigherunit 8JMKD3MGPCW/3ER446E
%@archivingpolicy denypublisher denyfinaldraft12
%@resumeid 8JMKD3MGP5W/3C9JGU3
%X Shallow drilling provided the first detailed record of vertical reef accretion rates for the last 4,000 years from the oceanic atoll Atol das Rocas. Six cores up to1-m long from windward, leeward, and intertidal hardground environments were radiocarbon dated. Frameworks are dominated by the coralline alga Porolithon cf. pachydermum with minor contributions of Lithophyllum sp. Coralline bindstone and framestone facies were identified. Vertical accretion rates (VAR) form three groups: group A frameworks were formed between 3,490 +/- 45 years BP and 2,770 +/- 45 years BP, and VAR are 0.85, 1.4, and 1.6 mm/year; group B frameworks were formed between 2,510 +/- 45 year BP and 490 +/- 45 year BP, and VAR are 0.25, 0.46, and 0.42 mm/year; group C frameworks were formed between 900 +/- 50 year BP and 655 +/- 45 year BP, and VAR are 3.2, 9.75, and 18.4 mm/year. Results indicate that coralline-algal reefs may display a catch-down response to a falling sea level similar to the way corals respond to a rising sea level. In this case, present day reef topography may be the result of late Holocene SW Atlantic sea-level changes. The calculated VAR of 18.4 mm/year is the highest rate known to date for a coralline-algal reef and close to the maximum rates recorded for corals.
%8 June
%N 2
%T Late Holocene reef growth and relative sea-level changes in Atol das Rocas, equatorial South Atlantic
%@secondarytype PRE PI
%K OCEANOGRAFIA, coralline algae, reef growth, radiocarbon dating, Atol das Rocas.
%@usergroup administrator
%@usergroup marciana
%@usergroup sergio
%@group DSR-INPE-MCT-BR
%3 J2816W186363K471.pdf
%@copyholder SID/SCD
%@secondarykey INPE-12879-PRE/8169
%@issn 0722-4028
%2 sid.inpe.br/iris@1912/2005/07.12.11.49.44
%@affiliation Royal Holloway Univ London, Dept Geol, Egham, Surrey TW20 0EX England
%@affiliation Instituto Nacional de Pesquisas Espaciais, Divisão de Sensoriamento Remoto(INPE, DSR)
%@project Programa HIDRO
%B Coral Reefs
%@versiontype publisher
%P 264-272
%4 sid.inpe.br/iris@1912/2005/07.12.11.49
%@documentstage not transferred
%D 2005
%V 24
%A Gherardi, Douglas Francisco Marcolino,
%A Bosence,  D. W. J.,
%@dissemination WEBSCI
%@area SRE