fromwww.scientificamerican.com
1 week agoCould a Time Capsule Outlast Plate Tectonics?
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.
Science




:max_bytes(150000):strip_icc()/TAL-yosemite-naitonal-park-EXPLSWATERYOS0725-e1583192adaf4b53b6114d09ac8a2119.jpg)












