Discover Blue Rock
![Blue Rock Discovered! Blue Rock Discovered!](http://static7.depositphotos.com/1106664/694/i/950/depositphotos_6945031-Blue-rock-texture.jpg)
Blue Rock Technical Terms
Blue Rock: The very dense (e.g. 2.75 g/cc), extremely hard and massive, nominally vesicular lava that commonly forms the inner core of an `a`a lava flow. SW
Blue Rock: The very dense (e.g. 2.75 g/cc), extremely hard and massive, nominally vesicular lava that commonly forms the inner core of an `a`a lava flow. SW