Sökning: "Baltoscandia"
Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet Baltoscandia.
1. Conodont biostratigraphy, taxonomy and palaeoecology in the Darriwilian (Middle Ordovician) of Baltoscandia - with focus on meteorite and extraterrestrial chromite-rich strata
Sammanfattning : This thesis deals with conodont biostratigraphy and palaeoecology in the Darriwilian (Middle Ordovician) of Baltoscandia, with focus on limestone strata showing traces of the ~ 470 Ma L-chondrite parent body break-up. The evidence for this cosmic event includes abundant centimeter to decimeter-sized fossil meteorites and elevated levels of sediment-dispersed extraterrestrial L-type chromite found in a stratigraphical interval corresponding to the uppermost Lenodus antivariabilis, the L. LÄS MER
2. Early–Middle Ordovician biotic and sedimentary dynamics in the Baltoscandian paleobasin
Sammanfattning : The Baltoscandian region forms part of the paleocontinent Baltica, which was largely covered by a shallow epeiric sea throughout much of the Ordovician (c. 485.5–444 Ma). This ancient sea is today recorded by a thin succession of sedimentary rocks. LÄS MER
3. Middle Cambrian biostratigraphy, fauna and facies in southern Baltoscandia
Sammanfattning : .... LÄS MER
4. Conodont biostratigraphy and diversity in The Lower-Middle Ordovician of Eastern Baltoscandia (St. Petersburg region, Russia) and Kazakhstan
Sammanfattning : Conodonts were first discovered and described by Christian Pander in 1856 from the St. Petersburg region. LÄS MER
5. Middle ordovician conodonts from the Atlantic faunal region and the evolution of key conodont genera
Sammanfattning : This thesis consists of seven separate articles that are mainly concerned with Middle Ordovician conodonts. The studied conodont specimens were obtained from three Middle Ordovician sections in south China and four Middle Ordovician sections in Sweden. LÄS MER