Arkhangelsk Oblast Arkhangelsk Oblast Arkhangelsk Oblast (, "Arkhangelskaya oblast") is a federal subject of Russia (an oblast). It includes the Arctic archipelagos of Franz Josef Land and Novaya Zemlya, as well as the Solovetsky Islands in the White Sea. Arkhangelsk Oblast also has administrative jurisdiction over Nenets Autonomous Okrug. Including Nenetsia, Arkhangelsk Oblast has an area of 587,400 km. Its population (including Nenetsia) was 1,227,626 as of the 2010 Census. The city of Arkhangelsk, with a population of 348,716 as of the 2010 Census, is the administrative center of the oblast. The second largest city is the nearby Severodvinsk, home to Sevmash,
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.