| 释义 |
> as lemmasBurgess Shale fossil Burgess Shale n. A mudstone formation in the Rocky Mountains of western Canada, containing a wide range of well-preserved invertebrate fossils (including those of soft-bodied animals) from the Cambrian period. Also attributive, as Burgess Shale fauna, Burgess Shale fossil, etc.Many of the animal forms represented in the Burgess Shale are unlike any animals known from later periods.< |