Arkhangelsk Dutch that sailed to the White Sea area. In 1584 Ivan ordered the founding of New Kholmogory (which would later be renamed after the nearby Archangel Michael Monastery). At the time access to the Baltic Sea was still mostly controlled by Sweden, so while Arkhangelsk was icebound in winter, it remained Moscow's almost sole link to the sea-trade. Local inhabitants, called Pomors, were the first to explore trade routes to Northern Siberia as far as the trans-Urals city of Mangazeya and beyond. In December 1613, during the Time of Troubles, Arkhangelsk was besieged by Polish-Lithuanian marauders commanded by Stanislaw Jasinski
Onega stepanovi placed in phylum Proarticulata, as the segments in recently discovered, exceptionally well-preserved fossils display the glide, or "staggered", symmetry characteristic of the majority of proarticulatans. Imprints of "Onega stepanovi" have been found in the Verkhovka and Zimnie Gory Formations of the Ediacaran (Vendian) rocks of the Arkhangelsk Region, Russia. All the fossil specimens are negative imprints on the bases of fine-grained sandstone beds with the "elephant skin" and tubercle texture diagnostic of microbial mats. The same bedding planes contain various other Ediacaran species: "Cyclomedusa", "Ediacaria", palaeopascichnids, "Eoporpita", "Yorgia", "Andiva", "Archaeaspinus", "Vendia", "Dickinsonia", "Anfesta", "Albumares", "Tribrachidium", "Kimberella", "Parvancorina", "Charniodiscus" and others.