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| Seven Coloured Earths | |
|---|---|
| Name | Seven Coloured Earths |
| Native name | Terres des Sept Couleurs |
| Location | Chamarel, Rivière Noire District, Mauritius |
| Area | ~7 |
| Coordinates region | MU |
| Type | sand dune / lava flow-derived formation |
Seven Coloured Earths
The Seven Coloured Earths is a geologic tourist attraction in Chamarel, Rivière Noire District, Mauritius, noted for sand dunes exhibiting stratified bands of red, brown, violet, green, blue, purple and yellow hues. Located within the broader landscape of Black River Gorges National Park and near features such as the Chamarel Waterfall and Le Morne Brabant, the site attracts visitors from Port Louis, Curepipe, Flic-en-Flac and international gateways including Sir Seewoosagur Ramgoolam International Airport. The feature has drawn attention from researchers affiliated with institutions like the University of Mauritius, Mauritius Institute of Education, Royal Society-linked scholars and international teams from University of Oxford, University of Cambridge and CNRS.
The deposit lies on the western side of Mauritius in the southwestern highlands near the Plaine Champagne plateau, between the volcanic edifices of Piton de la Petite Rivière Noire and the Moka Range. The nearest settlements include Chamarel village, Le Morne and Rivière Noire District towns, with access roads connecting to arterial routes leading to Port Louis and the tourism hubs of Grand Baie and Belle Mare. The area is mapped within cartographic products by Ordnance Survey-style agencies and has been the subject of field surveys by the Ministry of Environment, Solid Waste Management and Climate Change and international geoscience teams from United Nations Educational, Scientific and Cultural Organization-linked programs.
Geologists interpret the chromatic dunes as the product of late-stage weathering of basaltic lavas derived from the now-extinct Mascarene hotspot volcanism that formed Mauritius and neighboring islands such as Réunion and Rodrigues. Studies reference processes akin to lateritization documented in Madagascar and India where olivine, pyroxene and feldspar alteration yields iron oxides, aluminum hydroxides, and clay minerals. Analytical work by teams from University of Mauritius, Imperial College London and CNRS has identified mineral constituents including hematite, goethite, gibbsite and various phyllosilicates also found in deposits studied by US Geological Survey and Geological Society of London researchers. Radiometric and stratigraphic correlations link the material to eruption episodes contemporaneous with formations studied on Réunion such as Piton de la Fournaise and with erosional patterns akin to those mapped in Hawaii and Iceland.
The spectrum of colours arises from variable proportions and particle sizes of iron-bearing oxides like hematite (reddish), goethite (yellow-brown) and ultrafine aluminium hydroxides (blue-violet scattering), similar to optical effects analyzed in mineralogical research at Massachusetts Institute of Technology, Stanford University and Max Planck Institute for Colloids and Interfaces. Light scattering, thin-film interference and Mie scattering mechanisms have been invoked by investigators from École Normale Supérieure, ETH Zurich and California Institute of Technology to explain vivid chromatic separation. Comparative spectroscopy studies using equipment from European Synchrotron Radiation Facility and Brookhaven National Laboratory have measured reflectance spectra consistent with multi-mineral lamination rather than organic pigmentation, paralleling findings from deposits catalogued by the Smithsonian Institution.
The microhabitats around the dunes adjoin endemic forest fragments featuring species protected by Black River Gorges National Park management and recorded by botanists from Kew Gardens, Royal Botanic Gardens, Kew and the Mauritius Herbarium. Nearby flora and fauna include endemic plants like those in inventories by the Mauritius Wildlife Foundation, and faunal records linked to conservation programs with IUCN and BirdLife International, including endemic birds formerly studied in the context of Dodos and extinct Mascarene avifauna research. The site’s microclimate shows localized thermal and moisture gradients measured by climatologists from Météo-France and the World Meteorological Organization that influence seedling establishment and erosion processes documented by soil scientists at CSIRO and Wageningen University.
Tour operators based in Chamarel village, Black River and Flic-en-Flac offer guided access alongside municipal infrastructure improvements funded by agencies including the Mauritius Tourism Promotion Authority and public-private partnerships with hotels such as those managed by groups like Sun Resorts and Heritage Le Telfair. Visitor facilities include boardwalks, viewing platforms, interpretive signage developed with input from IUCN advisers and research from institutions like University of Mauritius and Aga Khan Trust for Culture. The site is integrated into tour circuits with attractions such as Chamarel Waterfall, La Vallée des Couleurs and Le Morne Cultural Landscape, drawing cruise passengers from ships calling at Port Louis Harbour.
Conservation oversight involves the Mauritius National Parks and Conservation Service and collaborations with NGOs including the Mauritius Wildlife Foundation, Global Environment Facility projects and academic partners from University of Oxford and Université de Paris. Management measures address visitor impacts, invasive species control informed by studies from Forest Research Institute Malaysia analogues and erosion mitigation techniques adapted from restoration projects in Réunion and Seychelles. Protected area zoning, monitoring by agencies like the African Union-affiliated programs and capacity-building supported by UNEP aim to balance geology preservation with sustainable tourism.
Local Creole and Franco-Mauritian oral traditions weave legends invoking figures from island history such as tales associated with settlers, Dutch East India Company stopovers and narratives related to local families in Chamarel village. Folklore and art commissions curated by institutions like the Blue Penny Museum and festivals organized by the Mauritius Cultural Development Fund have incorporated the dunes into cultural interpretation alongside historical exhibits on colonial-era artifacts linked to French colonization of Mauritius and the British Mauritius period. The site features in guided cultural itineraries alongside heritage sites such as Aapravasi Ghat and Eureka House.
Category:Landforms of Mauritius Category:Tourist attractions in Mauritius