Results 141 to 150 of about 92,675 (274)

Ordovician and Silurian coral faunas of western United States [PDF]

, 1956
Helen Duncan
openalex   +1 more source

Climatic and Biogeochemical Effects of a Galactic Gamma-Ray Burst

, 2005
It is likely that one or more gamma-ray bursts within our galaxy have strongly irradiated the Earth in the last Gy. This produces significant atmospheric ionization and dissociation, resulting in ozone depletion and DNA-damaging ultraviolet solar flux ...
Adrian L. Melott, Band, Brenchley, Brian C. Thomas, Charles H. Jackman, Cockell, Considine, Daniel P. Hogan, Dermer, Douglas, Ellis, Fleming, Gensel, Herrmann, Herrmann, Hoyt, Häder, Jackman, Jackman, Larissa M. Ejzak, Melott, Mészáros, Pancost, Patzkowsky, Reid, Scalo, Schlesinger, Sheehan, Smith, Thomas, Thorsett, Vandaele, Waxman, Wellman   +33 more
core   +1 more source

Ordovician corals from Ida Bay, Queenstown and Zeehan, Tasmania [PDF]

, 1955
Dorothy Hill
openalex   +1 more source

Ordovician palaeogeography and climate change

, 2020
L. Cocks, T. Torsvik
semanticscholar   +1 more source

Palaeozoic arthropods in Baltoscandian erratics from the coastal cliffs near Gdynia in northern Poland

Geologos
Fossils recovered from Baltoscandian erratic boulders and cobbles, collected on the beach near Orłowo and Oksywie Cliff (the latter for the first time) near Gdynia in northern Poland constitute an interesting lot.
Kowalewska Agata, Jagt-Yazykova Elena
doaj   +1 more source

Late Cambrian acritarchs from the Santa Rosita Formation: implications for the Cambrian-Ordovician boundary in the eastern Cordillera of northwest Argentina [PDF]

, 2003
Marine phytoplankton from the Late Cambrian are described for the first time in the Eastern Cordillera of northwest Argentina. The acritarch assemblage was recovered from an offshore lower mudstone unit towards the base of the Casa Colorada Member (Santa
Buatois, Luis Alberto, Mangano, Maria Gabriela, Rubinstein, Claudia Viviana   +2 more
core  

Cambrian-Ordovician boundary in the Adirondack-Border region [PDF]

, 1942
Robert R. Wheeler
openalex   +1 more source

Structural petrology of Cambro-Ordovician limestones of the north-west Highlands of Scotland [PDF]

, 1958
C. B. Crampton
openalex   +1 more source

Descriptions of new species of Ordovician fossils from China

, 1907
Stuart Weller
openalex   +2 more sources

Classification and evaluation of sweet spots of marine shale gas reservoir in Ordovician Wulalike Formation on the westen margin of Ordos Basin

Shiyou shiyan dizhi
Sweet spot evaluation is of great significance for efficient exploration and development of shale gas reservoirs. Taking the shale reservoir in Ordovician Wulalike Formation on the western margin of the Ordos Basin as the research object, eight ...
Linlin ZHANG, Kongjie WANG, Fengpeng LAI, Wei GUO, Lili MIAO   +4 more
doaj   +1 more source