The Danian-Selandian boundary at Svejstrup is characterized by an abrupt facies change from a pure li­mestone to a terrigeneous marl. The top of the Danian limestone is an intensively burrowed abrasion sur­face. The Sel:indian deposits are initiated by a conglomerate of glauconitized and phosphatized limestone pebbles. Although the boundary at Svejstrup is very similar to the nearby section at Hvalklse, the time in­terval included in the hiatus at Svejstrup is greater than at Hvall0se. The

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... liths and dinoflagellates in­dicate different ages for the top of the Danian. It is also shown that the Danian sequences in the Harre and the Viborg 1 borings include strata younger than in any previously described Danian sections. At both of these localities a number of coccoliths and a dinoflagellate, Spinidinium densispinatum, hitherto only re­corded from the Selandian, occur in the Danian limestone. The top of the Danian at Harre and Viborg 1 is of upper NP4 or lower NP5 age. The calcareous nannofossils of the lower Selandian are completely domi­nated by reworked Cretaceous forms, whereas reworked dinoflagellates are extremely rare. This dif­ference is probably due to oxidation of the Cretaceous dinoflagellates during reworking. Two new species of dinoflagellates from the Paleocene are described.