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This infographic shows just how much of the ocean we don't see World Oceans Day was this week, and to celebrate, we're showing you all the stuff beneath the waves. People sometimes forget that oceans contain a lot more than the water you see just beneath the surface.

Ordovician, 490-443 Ma ago: from Early to Mid-Ordovician, the earth experienced a milder climate. Siberia & Baltica were separate, & the 2 continents moved N toward Laurentia (NA). Avalonia split from the N margin of Gondwana, while the rest of that large continent (future SA, AU, AF, IN, AN) moved S over the S Pole. As Gondwana reached the S Pole during Late Ordovician, massive glaciers began to form, causing sea level to drop

Coesite in clinopyroxene in the Caledonides and its implications for geodynamics DAVID C. SMITH Laboratoire de Minéralogie, CNRS Laboratoire-Associé No. LA286, Muséum National d'Histoire Naturelle, 61 Rue de Buffon, 75005 Paris, France Coesite is reported for the first time from the Caledonide orogen. It occurs as inclusions in clinopyroxene in the dolomite-eclogite at Grytting, Norway, and provides valuable new evidence to support the hypothesis of extremely high pressure (≥30 kbar) in…