Several discrete ropes of basalt, Hawaii

Description
As the flow moved its surface twisted into the form of pahoehoe, i.e., ropy lava. Simultaneously, gas entrapped in the lava had the chance to escape, leaving behind the vesicular texture that comprises all but the glassy ropy surface of this rock.
Whereabouts

I collected this on the big island, Hawaii, in 1986.  I like the fact that the three ropes are so distinct and discrete, …not lost within a complex array of pahoehoe textures.  I also like the contrast between the glassy ropes and the drab vesicular basalt.

Age & Formation
Modern basalt.