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Holocene evolution and accumulation rates for Rodrigues Fringing Reef in the Southwest Indian Ocean

Created 07/08/2017

Updated 11/08/2023

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Rodrigues is located at latitude 19°43' S and longitude 63°25' E in the Southwest Indian Ocean and features the best developed reefs in the Mascarenes.

In 2001 a field expedition to Rodrigues recovered six drill cores using a portable hydraulic drilling rig. In all, two cores were recovered from the windward margin (cores 10 and 17), with a maximum depth of penetration of 4 m. Four cores were recovered from the leeward margin (8, 14, 15, 18) where the maximum depth penetration attained was 4.2 m. Recovery ranged from 23 to 63 %.

Thin sections were made and examined petrographically. Radiocarbon dating was performed on selected corals from the base of each core interpreted to have grown in situ and to be free from intraskeletal contamination.

Radiometric dating suggests that Rodrigues reefs approached sea level between 3.1 ± 0.3 cal kyr BP and 1.3 ± 0.2 cal kyr BP. In fact, the windward margin apparently grew to within 2.5 m of present day sea level by approximately 2.7 ± 0.2 cal kyr BP. The leeward margin approached modern day sea level more recently between 1.3 ± 0.2 cal kyr BP and 2.4 ± 0.3 cal kyr BP. Rates of vertical accretion for the top 4 m of the cores range from 0.46 - 1.96 m / kyr.

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Field Value
Title Holocene evolution and accumulation rates for Rodrigues Fringing Reef in the Southwest Indian Ocean
Language English
Licence Creative Commons Attribution 2.5 Australia
Landing Page https://data.gov.au/data/en/dataset/be0ccfb8-96fd-4fe7-a401-b6520000704a
Contact Point
Australian National University
Bradley.Opdyke@anu.edu.au
Reference Period 07/08/2017
Geospatial Coverage
Map data © OpenStreetMap contributors
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  "type": "Polygon"
}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Holocene evolution and accumulation rates for Rodrigues Fringing Reef in the Southwest Indian Ocean". Please visit the source to access the original metadata of the dataset:
https://data.gov.au/data/dataset/holocene-evolution-and-accumulation-rates-for-rodrigues-fringing-reef-in-the-southwest-indian-o