Bivalve beds reveal rapid changes in ocean oxygenation in the Boreal Middle Triassic - a case study from Svalbard, Norway.Published in:Norwegian Journal of Geology, 2023, v. 103, p. 1, doi. 10.17850/njg103-2-1By:Engelschiøn, Victoria S.;Bernhardsen, Sofie;Wesenlund, Fredrik;Hammer, Øyvind;Hurum, Jørn H.;Mørk, AtlePublication type:Article