An unusual feature of the Burgess Shale is that it is one of the earliest fossil beds to contain impressions of the soft parts of animals.

布尔吉斯叶岩不同寻常的特质在于，它是保存有生物软体结构的最古老化石。

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An unusual feature of the Burgess Shale is that it is one of the earliest fossil beds to contain impressions of the soft parts of animals.

布尔吉斯叶岩不同寻常的特质在于，它是保存有生物软体结构的最古老化石。

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