Middle Silurian Reefs in Southern Peary Land, North Greenland
Middle Silurian Reefs in Southern Peary Land, North Greenland
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北格陵兰岛南梨地的中志留纪珊瑚礁
DOI：
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发表时间：
1976
影响因子：
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通讯作者：
U. Mayr
中科院分区：
文献类型：
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作者：
U. Mayr
摘要加拿大北极群岛和北方格陵兰岛的奥陶纪和志留纪岩石的特征是从碳酸盐到细粒碎屑岩的相变--这种相变可以追溯到从育空地区到加拿大北极群岛到格陵兰岛东北部。在格陵兰岛北方的皮尔里地南部中部，中志留世和部分晚志留世时期形成了小型生物礁。这些珊瑚礁具有横向页岩等效物，是广泛的碳酸盐岩架中最年轻的碳酸盐岩，随后被粉砂岩覆盖。最大的珊瑚礁估计有1500英尺（450米）的厚度。这些珊瑚礁的古地理和古生态条件可能与澳大利亚昆士兰州和萨胡尔大陆架目前存在的珊瑚礁相似。
ABSTRACT The Ordovician and Silurian rocks of the Canadian Arctic Archipelago and northern Greenland are characterized by a facies change from carbonates to fine-grained clastics -- a facies change that may be traced from the Yukon Territory through the Canadian Arctic Archipelago to northeastern Greenland. In the central part of southern Peary Land on northern Greenland, small reefs formed during Middle and part of Late Silurian time. These reefs have a lateral shale equivalent and are the youngest carbonates of an extensive carbonate shelf which was subsequently covered by siltstone. The largest reefs have an estimated thickness of 1500 ft (450 m). Paleogeographic and paleoecological conditions for these reefs may have been similar to those that exist at present on the Queensland and Sahul shelves of Australia.