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Repeated occurrence of palaeo-wildfires during deposition of the Bahariya Formation (early Cenomanian) of Egypt
Journal of Palaeogeography ( IF 2.9 ) Pub Date : 2019-08-26 , DOI: 10.1186/s42501-019-0042-6
Haytham El Atfy , Tarek Anan , André Jasper , Dieter Uhl

The Upper Cretaceous (early Cenomanian) Bahariya Formation of Egypt has an outstanding reputation for its wealth of vertebrate remains, including a variety of iconic dinosaurs, like the carnivorous Spinosaurus and Carcharodontosaurus, as well as the herbivorous Aegyptosaurus and Paralititan. Besides these dinosaur fossils, the Bahariya Formation yielded also a wealth of invertebrate and plant remains, but even today many aspects concerning the continental palaeoenvironments reflected in these deposits (including the occurrence of palaeo-wildfires) have not been studied in detail. So far six distinct macro-charcoal bearing levels could be identified within the type section of the Bahariya Formation at Gabal El Dist profile, one of the most prolific outcrops of this formation in terms of fossil occurrence located in the north of the Bahariya Oasis, Western Desert, Egypt. Most of the charcoal investigated by means of SEM originates from ferns, pointing to a considerable proportion of this plant group within the palaeo-ecosystems that experienced fires. Gymnosperms and (putative) angiosperms have less frequently been identified. The collected data present evidence that the landscapes at the northern shores of Gondwana repeatedly experienced palaeo-wildfires, adding extra proof to previous statements that the Late Cretaceous was a fiery world on a global scale.

中文翻译:

埃及巴哈里亚组(早期森诺曼阶)沉积期间古野火反复发生

埃及的上白垩纪(早期森诺曼阶)巴哈里亚组以其丰富的脊椎动物遗骸而闻名,其中包括各种标志性恐龙,如肉食性棘龙和鲨齿龙,以及食草性埃及龙和帕拉里坦。除了这些恐龙化石外,巴哈里亚组还产生了丰富的无脊椎动物和植物遗骸,但直到今天,这些沉积物所反映的大陆古环境的许多方面(包括古野火的发生)仍未得到详细研究。到目前为止,可以在 Gabal El Dist 剖面的 Bahariya 地层的类型剖面内确定六个不同的宏观含碳层,就位于 Bahariya 绿洲北部的化石出现而言,该地层是该地层最多产的露头之一,埃及西部沙漠。通过 SEM 研究的大部分木炭来自蕨类植物,表明该植物群在经历过火灾的古生态系统中占有相当大的比例。裸子植物和(推定的)被子植物很少被发现。收集到的数据证明冈瓦纳大陆北岸的景观反复经历古野火,为先前关于晚白垩世在全球范围内是一个火热世界的说法提供了额外的证据。
更新日期:2019-08-26
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