任何无法分类的、不溶于酸(即非碳酸盐、非硅质)的微小有机化石。
任何无法分类的、不溶于酸(即非碳酸盐、非硅质)的微小有机化石。
任何无法分类的、不溶于酸(即非碳酸盐、非硅质)的微小有机化石。
Any small, non-acid-soluble (i.e. non-carbonate, non-siliceous) organic fossil that cannot be classified.
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