Stone: Building stone rock fill and armourstone in construction Geological Society Engineering Geology Special Publication No 16 edited by M R S m i t h (Institute of Q u a r r y i n g UK) The Engineering Group of the Geological Society convened a Working Party in 1993 and gave it the objective of presenting an authoritative Stone: Building stone rock fill and armourstone in construction Geological Society Engineering Geology Special Publication No 16 edited by M R S m i t h (Institute of Q u a r r y i n g UK) The Engineering Group of the Geological Society convened a Working Party in 1993 and gave it the objective of presenting an authoritative

Stone: Building Stone Rock Fill and Armourstone in

Stone: Building stone rock fill and armourstone in construction Geological Society Engineering Geology Special Publication No 16 edited by M R S m i t h (Institute of Q u a r r y i n g UK) The Engineering Group of the Geological Society convened a Working Party in 1993 and gave it the objective of presenting an authoritative

Stone: Building stone rock fill and armourstone in construction Geological Society Engineering Geology Special Publication No 16 edited by M R S m i t h (Institute of Q u a r r y i n g UK) The Engineering Group of the Geological Society convened a Working Party in 1993 and gave it the objective of presenting an authoritative

The Yogo dike is located in the central alkalic province of Montana on the eastern flank of the Little Belt Mountains about 95 km southeast of Great Falls It has been sporadically mined since the end of the last century for its gem quality blue sapphires The intrusion is classified as an ouachitite of the ultramafic lamprophyre group It is composed of phlogopite and clinopyroxene

Stone: Building stone rock fill and armourstone in construction Geological Society Engineering Geology Special Publication No 16 edited by M R S m i t h (Institute of Q u a r r y i n g UK) The Engineering Group of the Geological Society convened a Working Party in 1993 and gave it the objective of presenting an authoritative