Lanzarote Geological History: Ancient, Continued
The prevailing winds over Lanzarote blow from the east, from Africa, But, what is and has been even more devasting to this island has been its
bringing with them a lot of dust and sand, and the occaisional locust swarm...
(Not kidding! The last crop devasting locust invasion was in October 1954...)
resident volcanos. At least until today, but, more about that later. In this
picture, the lighter layers are sediment, airborne and natural decay, and the
darker layers are evidence of volcanic ash. There are also several other layers
of different colors that indicate many other periods of this island's geologic
evolution. Some thin dark layers toward the top may be from eruptions on the
other Canaries. The thick ones toward the bottom, well, I would not have
wanted to be around when they were happening. But, there was a time when there
was someone around to record a few eruptions here. And not too long ago. But first:
