ter, to adepters, or about 7.6 miles. Bearing in mind t t of ts only about 0.3 percent of t’s volume and t t cuteven one-t, we can o erior.

    Interestingly, even t, nearly everyt it was surprising.

    Seismic udies ists to predict, and pretty confidently, t ter sedimentary rock to a depters, folloe for t 2,300meters and basalt from t, tary layer deeper ted and tic layer  all. Moreover, ted, emperature at 10,000 meters of 180degrees centigrade, nearly ted level. Most surprising of all  t t depturated er—somet  been t possible.

    Because  see into to use otecly involvereading ravel terior. e also knotle bit about tlefrom e pipes,  fires, in effect, a cannonball of magma to t supersonic speeds. It is a totally random event. A kimberlite pipe could explode inyour backyard as you read to 120 milesdoe pipes bring up all kinds of t normally found on or near tite, crystals of olivine, and—just occasionally, in about one pipein a s of carbon comes up e ejecta, but most isvaporized or turns to grape. Only occasionally does a  s up at just tspeed and cool doness to become a diamond. It ive diamond mining city in t t  kno. Geologists kno someern Indiana t may be trulycolossal. Diamonds up to ty carats or more  scattered sites tt no one es, it may be buriedunder glacially deposited soil, like ter in Io Lakes.

    So  tle. Scientists aregenerally agreed t ter crust, amantle of , viscous rock, a liquid outer core, and a solid inner core.

    1e kno ted by silicates, for