Phanerozoic polar wander, palaeogeography and dynamics

Abstract

2016-12-23T18:52:10

Keuper magnetostratigraphy in the southern Mesozoic margin of the Holy Cross Mts. (southeastern edge of the German Basin)

“…About 25° of syndepositional in cli na tion shallowing is also ob served in mod ern, flu vial, haematite-bear ing sed i ments (Tan and Kodama, 2002 and ci ta tions therein).The palaeopole po si tion cal cu lated from the trans posed re versed and nor mal po lar ity sam ples is 311° lon gi tude and -52.8° lat i tude (Fig. 9) ac cord ing to the south ern hemi sphere pro jec tion (Torsvik et al, 2012). These val ues cor re spond well to the Late Tri as sic (Norian) seg ment of the ref er ence Phanerozoic Ap par ent Po lar Wan der Path for Baltica/Eu rope (Torsvik et al, 2012).…”

“…mag netic di rec tion cor respond ing to a pole po si tion of 357.9° lon gi tude and -80° lat i tude (Fig. 9) ac cord ing to the south ern hemi sphere pro jec tion (Torsvik et al, 2012).…”

“…9) ac cord ing to the south ern hemi sphere pro jec tion (Torsvik et al, 2012). These val ues cor re spond well to the Late Tri as sic (Norian) seg ment of the ref er ence Phanerozoic Ap par ent Po lar Wan der Path for Baltica/Eu rope (Torsvik et al, 2012). Sim i lar val ues of ~305-311° dec li na tion and ~-50° have been obtained from the 215-226 Ma Eu ro pean Up per Tri as sic (Walderhaug, 1993;Torsvik et al, 2008).…”

Paleontology of the Bears Ears National Monument: history of exploration and designation of the monument

“…During the Triassic Period, southwestern North America was located close to the equator, between the equator and ~15°N (Kent and Irving, 2010;Torsvik et al, 2012). At this time, western Utah comprised the coast and shallow marine shelf of the eastern margin of the Panthalassic Ocean.…”

Upper Kellwasser carbon isotope excursion pre-dates the F–F boundary in the Upper Devonian Lennard Shelf carbonate system, Canning Basin, Western Australia

“…For example, almost all European, North American, and North African sections were located in shallow, epicontinental settings at this time. Ongoing convergence between Laurussia and Gondwana forced the closing of the Rheic Ocean and constricted the southwestern part of the Paleotethys seaway (Keppie and Ramos, 1999;Stampfli et al, 2002;Torsvik et al, 2012). Shallow water settings in the affected regions became increasingly susceptible to the effects of the end-Frasnian regression, and also experienced an increased influx of continentally-derived material from weathering and erosion associated with active orogenies (e.g.…”