This comment questions an hypothesis for formation of the ornamental stone “zebra rock” from Ediacaran red shales of northwestern Australia as hydrothermal alteration zones. The hypothesis is falsified by absence of Eu anomalies in REE arrays, lack of associated carbonate, low degree of chemical weathering, associated soluble gypsum, strata concordance in narrow bands, low thermal stability of magnetization, modest diagenetic alteration, and patterns unlike liesegang banding. Rather than Cambrian hydrothermal veins, zebra rocks were gleyed paleosols with redox banding, from acid sulfate weathering at low temperature during the Ediacaran.

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评论“Kawahara, H., Yoshida, H., Yamamoto, K., Katsuta, N., Nishimoto, S., Umemura, A., Kuma, R., 2022。斑马岩中铁氧化物带的热液形成来自西澳大利亚北部。化学地质 590 (2022), 120699”

该评论质疑从澳大利亚西北部的埃迪卡拉纪红色页岩作为热液蚀变带形成观赏石“斑马岩”的假设。REE 阵列中没有 Eu 异常、缺乏伴生的碳酸盐、化学风化程度低、伴生的可溶性石膏、窄带内的地层一致性、磁化热稳定性低、适度的成岩蚀变以及与 Liesegang 带不同的模式，证明了该假设是错误的。斑马岩不是寒武纪热液脉，而是由埃迪卡拉纪低温酸性硫酸盐风化形成的带有氧化还原带的古土壤。