The burial features and age of the newly discovered Nothosaur in Guojiawan area, southwestern Guizhou Province
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摘要:
1:5万区域地质调查在黔西南郭家湾新发现了一处幻龙化石点。通过剖面测制，详细解剖了化石的异地埋藏特征，并依据区域地质填图和化石资料确定其时代为中三叠世安尼期。在此基础上，根据黔西南及邻区安尼期化石群的分布，结合岩相古地理分布特征，浅析了幻龙化石可能的物源，结果显示郭家湾一带为幻龙活动范围的可能性较大。该幻龙化石的发现及其时代的限定，为研究三叠纪海生爬行动物的演化和迁移提供了新的素材，具有重要的科学意义。
Abstract:Through the 1:50000 regional geological survey, a new nothosaur fossil site was discovered in Guojiawan area, southwestern Guizhou Province. Based on the field section measurement, the short-distance burial characteristics of the fossils were analyzed in detail, and the age was considered to be Middle Triassic Anisian Stage according to the regional geological mapping and fossil data. Combined with the distribution and the paleogeographic characteristics of the Anisian Stage biotas in the west of Guizhou Province and its adjacent areas, the authors analyzed the possible source. The result shows that Guojiawan area was the possible living place of the nothosaur. The discovery of the nothosaur and its age provides new material and evidence for the evolution and migration of Triassic Marine reptiles, and hence has important scientific significance.
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Key words:
- Anisian Stage /
- Nothosaur /
- burial features /
- Guojiawan
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