In the pale light of the tunnel, 30-foot fossil traces of lycopsid gleam slickly in the shale roof like alligator skins.

它们看起来像一棵棵巨型的芦笋。在隧道内黯淡的灯光下，页岩顶30英长的松化遗迹就像鳄发出柔滑的光亮。