美国威斯康星州黑莓山的化石:5亿年前陆地上的第一批动物

Geology Today Pub Date : 2022-02-03 DOI:10.1111/gto.12379

Simon J. Braddy, Kenneth C. Gass, Todd C. Gass

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引用次数: 4

摘要

最近在美国威斯康辛州黑莓山的古代潮滩上发现的轨道和小径，改变了我们对500年前陆地入侵的理解。巨大的蛞蝓状软体动物在微生物席上吃草。类真癌(茎多足类)死亡痕迹(mortichnia)表明它们不是来陆地上觅食或繁殖的，而只是为了生存;那时月球离地球更近，巨大的潮汐将动物困在逐渐干涸的潮汐池中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Fossils of Blackberry Hill, Wisconsin, USA: the first animals on land, 500 million years ago

Recent discoveries of trackways and trails on ancient tidal flats at Blackberry Hill, Wisconsin, USA, have transformed our understanding of the initial invasion of land, 500 Ma. Huge slug-like molluscs grazed on microbial mats. Euthycarcinoid (stem myriapod) death traces (mortichnia) suggest that they did not come onto land to feed or breed, but simply to survive; Moon was closer to Earth then, and massive tides stranded animals in tidal pools that gradually dried up.

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