Martian stick-like structures are not trace fossils: a new protocol for testing ichnogenicity synthesized from paleosol ichnology

IF 1.7 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS International Journal of Astrobiology Pub Date : 2021-09-03 DOI:10.1017/s1473550421000239
J. Genise
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Abstract

There are different criteria that are usually analysed independently before identifying a new trace fossil, such as morphological regularity, completeness, dispersion, recurrence and complexity, surface morphology, and context. The synthesis of these criteria, as utilized in paleosol ichnology, composes a protocol that is presented herein for the first time and can be used for testing the ichnogenicity of trace-like structures in any paleoenvironment of Earth or Mars. As a study case, the Martian ‘stick-like structures’ do not fulfil any of the requirements posed by this protocol to be postulated as trace fossils. The ichnogenicity test, focussed exclusively on morphology and context, is simpler but equally useful as the biogenicity ones. It may be applied in the future with other potential cases before carrying on more complex analyses or to evaluate the astrobiological interest of trace-like structures.
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火星棒状结构不是痕迹化石:从古土壤遗迹学合成的一种新的遗迹成因测试方案
在识别新的痕迹化石之前,通常会独立分析不同的标准,如形态规则性、完整性、分散性、重复性和复杂性、表面形态和背景。古土壤遗迹学中使用的这些标准的综合构成了本文首次提出的方案,可用于测试地球或火星任何古环境中痕量结构的遗迹成因。作为一个研究案例,火星的“棒状结构”不符合该协议提出的任何假设为痕迹化石的要求。基因原性测试只关注形态学和上下文,它更简单,但与生物原性测试一样有用。在进行更复杂的分析或评估类痕迹结构的天体生物学意义之前,它可能在未来与其他潜在案例一起应用。
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来源期刊
International Journal of Astrobiology
International Journal of Astrobiology 地学天文-地球科学综合
CiteScore
3.70
自引率
11.80%
发文量
45
审稿时长
>12 weeks
期刊介绍: International Journal of Astrobiology is the peer-reviewed forum for practitioners in this exciting interdisciplinary field. Coverage includes cosmic prebiotic chemistry, planetary evolution, the search for planetary systems and habitable zones, extremophile biology and experimental simulation of extraterrestrial environments, Mars as an abode of life, life detection in our solar system and beyond, the search for extraterrestrial intelligence, the history of the science of astrobiology, as well as societal and educational aspects of astrobiology. Occasionally an issue of the journal is devoted to the keynote plenary research papers from an international meeting. A notable feature of the journal is the global distribution of its authors.
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