Rock Samples

The rock samples are collected at [3][16] and [-9][39] and are needed to complete the Nothing Stops the AR-57 mission. When both are collected, your missiles are upgraded to the AR-57 missile, "It's explosive power allows it to destroy up to 9 bricks in only one shot." It takes two levels off of ferrous conglomerates, so a maximum-thickness conglomerate would need two missiles to be destroyed.

If it was to fire at ^, it would destroy the Xs in this diagram:

OOXXXOO

OOXXXOO

OOX_XOO

-----^----- 

The missile cannot destroy steel bricks. Gaps with no bricks/ destroyed bricks count as 'Xs'. The underscore represents an empty space.

The item description of the rock samples, or, Fusion, is:

The chemical reaction that occurs when you bring the samples together allows you to synthesize AR-57 missiles.