Notes on Arctic Paleozoic fossils

Notes on Silurian Fossils from Ohio and Other Central States

Arctic Cod in the Russian Arctic: New Data, With Notes on Intraspecific Forms

Polar cod has long been recognized as a key species of Arctic ecosystems [1]. Most of the information on its biology was obtained for the Barents and Chukchi seas [2-4] but for the other arctic Eurasian regions it is fragmentary, although numerous [520]. The quantitative data, letting to objectively assess the role of the Polar cod in the ecosystems of this vast region, is insufficient. This st...

Notes on the Ordovician Fossils from Bear Island Collected Du Ring the Swedish Expeditions

D uring his Arctic Expedition in the summer of 1898 A. G. NATHORST 1 succeeded in finding fossils in a limestone of the socalled Heclahook-system of Bear Island, the small inlet lying iso1ated between Norway and Spitzbergen, at about 7 41/2 o N. L. (see map p. 91 ). This Heclahook-system consists of a series of limestone, dolomite, quartzitic sandstone and shale, folded and generally very much ...

Cryptic Disc Structures Resembling Ediacaran Discoidal Fossils from the Lower Silurian Hellefjord Schist, Arctic Norway

The Hellefjord Schist, a volcaniclastic psammite-pelite formation in the Caledonides of Arctic Norway contains discoidal impressions and apparent tube casts that share morphological and taphonomic similarities to Neoproterozoic stem-holdfast forms. U-Pb zircon geochronology on the host metasediment indicates it was deposited between 437 ± 2 and 439 ± 3 Ma, but also indicates that an inferred ba...

Special Issue on Neoproterozoic–Paleozoic Ocean Chemistry

This special issue is based on a theme session convened at the Annual Meeting of the Geological Society of America held in Denver, Colorado, in October 2004. The theme session brought together a diverse group of scientists interested in the chemistry of Precambrian and Paleozoic oceans and its role in climatic and evolutionary events. The contributors to this issue make use of a wide range of i...