Numerous localities in the Maine-et-Loire coalfield northwestern France have yielded diverse adpression floras belonging to Calymmotheca stangeri Zone, indicating an early Namurian (Serpukhovian–late Mississippian) age. The floristic affinities are with South European Palaeoprovince, although there is some evidence of ecotonal relationship Central Palaeoprovince north. geological context deposi...

Abstract Our study of boreholes, seismic survey and magnetic data from the region between Baltic Basin Lublin indicates existence numerous buried intrusions effusive complexes, most them unnoticed so far, together with a few igneous massifs. They are alkaline character developed in time span c. 348 to 338 Ma. Deep reveal presence large sills (up 100 km long) within crystalline basement overlyin...

Recent resource assessment studies of eastern Kentucky oil shales have establlshed that this resource is a potential economic synthetic fuel feedstock (1). Extensive geochemical characterization of this resource has been carr ied out by the Institute for Mining and Mlnerals Research (University of Kentucky) with support f rom the Commonwealth of Kentucky Energy Cabinet, the U. S. Department of ...

_ _________________________________________ Introduction _______________________________________ Purpose of the study____________________________ Acknowledgments. ______________________________ Character and extent of the Berea sandstone.______ Method of investigation. ________________________ Well records ___________________________________ A description of some of the more common terms used b...

Populations existing in formerly glaciated areas often display composite historical and contemporary patterns of genetic structure. For Canadian freshwater fishes, population genetic structure is largely reflective of dispersal from glacial refugia and isolation within drainage basins across a range of scales. Enhancement of sport fisheries via hatchery stocking programs and other means has the...

Cahokia Mound 72 contains 272 human burials dating to the Lohmann and early Stirling phases (ca. 1050–1150 AD) of the Mississippian period. Substantial statusand gender-related differences in burial style are apparent. Some burials are associated with large quantities of prestigious grave goods, suggesting high status. Mass graves of young adult females with skeletal indicators of poor health s...

It is broadly accepted that so-called 'thermal' gas is the product of thermal cracking, 'primary' thermal gas from kerogen cracking, and 'secondary' thermal gas from oil cracking. Since thermal cracking of hydrocarbons does not generate products at equilibrium and thermal stress should not bring them to equilibrium over geologic time, we would not expect methane, ethane, and propane to be at eq...

Taphonomic information is examined to evaluate the early history of connective tissues in the Crinoidea. The pattern of stalk segmentation of Middle and Late Ordovician crinoids is consistent with the two-ligament (intercolumnal and through-going ligaments) pattern present in living isocrinid crinoids and interpreted for fossil isocrinids, holocrinids, and Lower Mississippian crinoids. A single...