Paleontologists know chert as a good place to look for fossils.古生物学者知道黑矽石同样的好地方去观看化石.The fossils appear to be an early form of seaweed washed up on a beach.这些化石看上去是被海水冲上岸的一种早期的水藻。The geologist found many uncovered fossil...
The fossils at Dinosaur Cove are embedded in hard sandstones.恐龙峡谷中的化石都嵌在坚硬的砂岩中。Oftentimes, these fossils are not made available to science at all.科学界常常压根接触不到这些化石。fossils over two million years old两百多万年的化石...