可疑化石（dubiofossil，problematic fossil）是指岩石中很像化石，但成因不明或尚不能确定为生物成因的物体或构造，多见于前寒武系。
这块新化石的来源有一点可疑，它最初是从一个商人手中买来的。
The origins of the new fossil are a little murky having originally been purchased from a dealer.
五年前，美国国土安全部调查了一起运自泰国的可疑货物案件，发现了一块史前的骨骼化石。
Five years ago, the United States Department of Homeland Security investigated what it considered a suspicious shipment from Thailand and found instead a prehistoric bone.
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