|Cabo de Gata Beach Castle|
|Mohomoho Wild Camping|
|Caves and Cliffs|
|Salt Pans Cabo de Gata|
|Sunrise Pink Rainbow|
|Motrils New Road (eventually)|
|\Industrial Poly Tunnels|
This geology business brings us neatly to our most recent destination Motril. The pictures we’ve added to this post are a mix of both areas. The stuff that looks like concrete is just rock made of a substrate like compressed black sand filled with a ballast that is mixed, quartz, quartzite, sandstone, mica stone pebbles and stuff I couldn’t even begin to name.
The thing that baffled us, is that fact that this rock has been in this state twice. By which I mean, the stuff that looks like concrete is laced with rounded pebbles. To create rounded pebbles you need wave action and lots of geological time. To then set those rounded pebbles in a black sand substrate as hard as concrete you then need lots more geological time, a covering layer of some other rocks, and for the whole shebang to be above sea level, or a good way away from the present shore to cook and compress. I’ve seen black sands like these in the Canaries, this is the first place in mainland Spain I’ve seen them, and it’s the first time I’ve seen it as a solid. Throw a hard quartz pebble at it and it makes a sound like a drum, and get up close and you would be forgiven for thinking men made it once upon a time and then left it for the sea to eat.
|Reeds by the Beach Motril|
Today I have found a beach pebble of almost pure quartz, and apart from its surface being rough like frosted glass it’s completely translucent (with careful polishing it would be completely clear). If it was the only one like it, I would have said it was the thick end of a broken bottle worn down by time. However Amanda found one the size of a chickens egg and almost as clear, but also frosted.
|Natural Concrete and Another Lighthouse|
|A Giant Nob Tree|