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Stromatolites New Caledonia
新喀里多尼亚

Stromatolites are cyanobacterial reefs - one of the oldest forms of visible life on our planet. Fossil stromatolites, like the ones shown here on the To Ndu beach and high up on the cliffs, have been carbon dated in other parts of the world dating back 3.5 billion years.

The cyanobacteria cement particles of sediment together in concentric layers forming mushroom or egg-shaped "colonies". The colonies are not especially large. The one Freddy is sitting on (to give you a sense of the size of the colonies) is about a metre in diameter. But the ancient stromatolite colonies clustered together to form massive reef structures.

The island of To Ndu, some 15 miles west of Noumea, is actually a fossil stromatolite reef, 1.3km long by 0.4km wide and 70 metres above the sea floor making it one of the larger fossil stromatolite reefs in the world. On the eastern side the sea has erroded the stromatolites, forming a flat surface tiled with the cross sectional view of the ancient colonies.

The concentric fossil colonies you see in this sphere image are undoubtedly very, very old but this ancient form of life is still alive and thriving here in New Caledonia (reference Pringault & Camoin 2005).

Copyright: Richard chesher
Type: Spherical
Resolution: 13092x6546
上传: 30/07/2012
更新: 26/05/2014
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Tags: stromatolites; new caledonia; fossil reef; stromatolite; cyanobacteria
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More About 新喀里多尼亚

新喀里多尼亚是离澳大利亚和新西兰最近的南太平洋岛屿。该岛是法国领地且官方语言是法语,尽管如此,其文化却丰富多彩,揉合了美拉尼西亚、欧洲、波利尼西亚、越南、中国、印尼等国的风情。这里有一个多山的大岛,称为大地岛 (Grande Terre),和6个较小的岛屿——洛亚蒂三岛 (Loyalty Islands)、贝莱普群岛 (Belep) 和松树岛 (Isle of Pines)。 整个群岛人口极为稀少,有大片的荒野。这里有数百公里长的徒步小径、随处可见的露营营地、超过42个公园和保护区、清澈透明的河流和莹莹闪光的瀑布。约三分之一的人口居住在首府努美阿。镍的开采是该国最主要的工业,也是维持其高标准生活的主要经济来源。大地岛四周环绕着世界第二大珊瑚礁,此珊瑚礁形成的泻湖是世界上最大的,也是受保护的泻湖。该泻湖于2008年被列为世界遗产,面积达24000平方公里,是品种丰富的鱼类和无脊椎动物栖息之地。 对于刚上岛的游客而言,最引人注目的是这里鲜艳夺目的色彩。努美阿以其完备的酒店、度假酒店、餐馆设施和丰富多彩的活动欢迎游客的到来。