In order to provide actual-scale exhibits of layers of sedimental and volcanic rock as well as sections showing the upthrusts of earthquake activity some displays show only a thin wall of rock, bonded to stabilizing backing.
(sections; showing; the upthrusts of earthquake activity) (some displays; show; only a thin wall of rock, bonded to stabilizing backing) (only a thin wall of rock; bonded; )
sections some displays only a thin wall of rock
showing show bonded
the upthrusts of earthquake activity
only a thin wall of rock, bonded to stabilizing backing