Assertion: fern | /r/AtLocation | the fossil record
Facets:
Source sentences:
text: They first appear in the fossil record about 360 million years ago in the late Devonian period, but many of the current families and species did not appear until roughly 145 million years ago in the early Cretaceous, after flowering plants came to dominate many environments.
text: Ferns first appear in the fossil record about 360 million years ago in the middle Devonian period, but many of the current families and species did not appear until roughly 145 million years ago in the early Cretaceous, after flowering plants came to dominate many environments.
text: Ferns first appear in the fossil record 360 million years ago in the Carboniferous Period but many of the current families and Species did not appear until roughly 145 million years ago in the late Cretaceous Period.