But this summer scientists are seeking another treasure: ancient plants and fish that became fossilized in the fine-grained mudstone of the area.
(scientists; are seeking; another treasure; T:this summer) (ancient plants and fish; became fossilized; L:in the fine-grained mudstone of the area)
scientists ancient plants and fish
are seeking became fossilized
another treasure T:this summer
L:in the fine-grained mudstone of the area