'A bed of this oil- & fossil-bearing rock from the Cambrian period was famously discovered near Mt. Burgess in 1909'
shale
ROCK: A bed of this oil- & fossil-bearing rock from the Cambrian period was famously discovered near Mt. Burgess in 1909
A bed of this oil- & fossil-bearing rock from the Cambrian period was famously discovered near Mt. Burgess in 1909
A bed of this oil- & fossil-bearing rock from the Cambrian period was famously discovered near Mt. Burgess in 1909
ROCK
shale
ROCK