The bones were eventually covered with mud and sand and saturated with silica, a rock-making mineral, causing the bones to harden like rock.
(The bones; were covered; with mud and sand; T:eventually) (The bones; saturated; with silica, a rock-making mineral; T:eventually) (a rock-making mineral; causing; the bones to harden like rock) Context(a rock - making mineral causing,List([79, 109))):(the bones; to harden; )
a rock - making mineral causing,List([79, 109))
The bones The bones a rock-making mineral the bones
were covered saturated causing to harden
with mud and sand T:eventually
with silica, a rock-making mineral T:eventually
the bones to harden like rock