Volcanic Rock - Part 2

In this second selection of volcanic rock studies from Lanzarote I used the deep orange-brown colour of the soil to contrast with the black rocks and to add interest to the compositions. I was intrigued by some of the orange on individual rocks which I think might be a type of lichen - but I can't be certain:

In places the soil was almost clay like:

Finally this image provides some context to the above images, giving an idea of the terrain in Lanzarote.