The sand stones had fragments of charcoal on some surfaces but found no recognisable fossils.
沙石表面有木炭碎片，但没有发现可辨认的化石。
-- George Mercer Dawson 乔治·默瑟·道森
The sand stones had fragments of charcoal on some surfaces but found no recognisable fossils.
阅读次数 1
