@Article{GherardiBose:2005:LaHoRe,
author = "Gherardi, Douglas Francisco Marcolino and Bosence, D. W. J.",
affiliation = "Royal Holloway Univ London, Dept Geol, Egham, Surrey TW20 0EX
England and Instituto Nacional de Pesquisas Espaciais,
Divis{\~a}o de Sensoriamento Remoto(INPE, DSR)",
title = "Late Holocene reef growth and relative sea-level changes in Atol
das Rocas, equatorial South Atlantic",
journal = "Coral Reefs",
year = "2005",
volume = "24",
number = "2",
pages = "264--272",
month = "June",
keywords = "OCEANOGRAFIA, coralline algae, reef growth, radiocarbon dating,
Atol das Rocas.",
abstract = "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.",
copyholder = "SID/SCD",
issn = "0722-4028",
language = "en",
targetfile = "J2816W186363K471.pdf",
urlaccessdate = "28 abr. 2024"
}