| Summary: | Within the sequence of marine and glacial sediments from the northeastern Billdjorden region, Central Spitsbergen, five glacial episodes are distinguished. Two of them are referred to the Late Pleistocene: the older, about 87 ka, which remains unnamed, and the younger, about 40-56 ka, which is named the Petuniabukta-Adolfbukta Stage and correlated with the Billefjorden Stage from the Kapp Ekholm section. The other three glacial episodes are referred to the Holocene: the oldest, about 8-9 ka (and named the Ebbadalen-ThomsondaIen Stage), the middle, probably about 2 - 3 ka, and the youngest, correlated with the Little Ice Age. The mollusk fauna (11 species) is described from the Holocene marine and glacial sediments; its composition proves Arctic and Boreal climatic conditions with Lusitanian influences.
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