a trilobite

a fossil / petrifaction / (metaphor, insult) out-of-date person, thing

to fossilize

(と〜) thinking that […] (with the next clause explaining that the truth is contrary to expectations)

to seem, to appear

continuative of the passive of 思う (omou); continuative of 思われる (omowareru)

(as と思われ) (2channel slang) Synonym of と思う (to omou)

in my opinion; I think; I guess; upon thought; upon reflection; upon contemplation / conceivably; presumably

as one wishes, in a way that one wants

fossil fuel