#tectonics

#tectonics

“This fluid connection is evidence that the fault boundary of the Kafue Rift is active. 'Therefore, the Southwest African Rift Zone is too - and may be an early indication of the break-up of sub-Saharan Africa.'”

Roxbury puddingstone, the mottled rock quarried nearby and used for much of the old church masonry in Boston, formed 600 million years ago in violent submarine landslides off the coast of a barren volcanic microcontinent that rifted off Africa. This is so long ago thatin the course of the perpetual wander of continentsthe whole thing happened somewhere near the south pole.