Gibraltar … the controversial British territory that looks more like Seville than Sevenoaks

Gibraltar St Michael’s Cave, cross section of a stalagmite

This is a cross section of a fallen stalagmite. It is believed to have fallen thousands of years ago due to its weight, and over the centuries has fused with the calcium from the floor it now rests on. The top was removed in the 1970s so visitors could see the make-up of the stalagmite. Like rings on a tree trunk, the lines are the layers formed over the centuries. The darker areas indicate periods in the stalagmite’s development when less rain fell and seeped through the rock to add further layers to the stalagmite

Bookmark the permalink.