"Devonian#Climate" . . "Devonian reef" . "Late Devonian" . "Upper Devonian" . "Early Devonian" . . . "400 million years ago" . "slate soil" . "Dev." . . "Mid Devonian" . "Early-Mid Devonian" . "Devonian" . "middle Devonian" . "devonian" . "Devon" . . "Devonian#The_greening_of_land" . . "Dittonian" . "Devonian rocks" . "Devonian" . "Downtonian" . "400 million years ago" . . . "Lower Devonian" . "middle Devonian shales" . . "Devonian sandstone" . "Middle Devonian" . . "Eifelian" . "400-460 million years ago" . . "early devonian" . "Devo-
nian" . "Upper Devonian period" . . "Middle Devonian deposits" . "Devonian age" . "Late Devonian Epoch" . . "four hundred million years previously" . "pre-Devonian" . . . "Early Devonian Epoch" . "D
e
v
o
n
i
a
n" . . . . "Lower-Middle Devonian" . "Middle Devonian period" . "Devonian geologic period" . "Devonian Era" . "Farlovian" . "Early Devonian periods" . "mid-Devonian" . . . "nian" . "Emsian" . "early Devonian" . "Devonian period" . "Devonian Period" . "Dev" . "Breconian" . . "Devonian#subdivisions" .