Geochronology,stratigraphyandgeochemistryofCambro-Ordovician,SilurianandDevonianvolcanicrocksof the Saxothuringian Zone inNEBavaria (Germany)–new constraints forGondwanabreakupandRheicocean-islandmagmatism.Stefan Höhn, Nikola Koglin, Lisa Klopf, Ulrich Schüssler, Harald Tragelehn, Hartwig E. Frimmel, Armin Zeh,HeleneBrätzCorrespondingauthor:S.Höhn,GeodynamicsandGeomaterialsResearchDivision,InstituteofGeographyandGeology,UniversityofWürzburg,AmHubland,D-97074Würzburg;hoehnstefan@gmx.de

Fig. S1: Stratigraphy of the Ordovician and Devonian in Bavarian Facies in the area ofKupferbergalongthewesternmarginoftheMünchbergMassif.

a, traditional stratigraphic subdivision as described by the Stratigraphic Commission ofGermany(Geyer&Wiefel,1997)and

b,newlysuggestedstratigraphicsubdivisionasderivedfromournewdata,inconsiderationofearlierresultsofGandl(1998)andSdzuy(2001)

Fig.S2:Zircongrains fromthebasaltDb1, takenfromtheKupferbergquarry;whitecirclesmarkU-Pbmeasurementspots,numbersindicatespotnumberandcorrespondingU-PbageinMa.Errorsare2s.

Fig. S3: Zircon grains from the quartz keratophyre STK1; white circles mark U-Pbmeasurement spots, numbers indicate spot number and corresponding U-Pb age in Ma.Errorsare2s.

Fig. S4: Zircon grains from the quartz keratophyre sampleWU1; white circles mark U-Pbmeasurement spots, numbers indicate spot number and corresponding U-Pb age in Ma.Errorsare2s.

Fig. S5: Zircon grains from the brecciated keratophyre HEI2; White circles mark U-Pbmeasurement spots, numbers indicate spot number and corresponding U-Pb age in Ma.Errorsare2s.

Fig.S6:ZircongrainsfromquartzkeratophyretuffsamplesTS-NF,TS-SRandTS-NM;whitecirclesmarkU-Pbmeasurementspots,numbersindicatespotnumberandcorrespondingU-PbageinMa.Errorsare2s.

Fig. S7: Probability diagrams and histograms forU-Pb zircon ages of volcanic rocks of theFrankenwaldarea.Errorsare2s.

References:

Gandl J (1998) Neue Daten zum jüngeren Paläozoikum NE-Bayerns und angrenzenderGebiete–FaziesentwicklungundgeotektonischeKonsequenzen.GeologicaBavarica103:19-273.

GeyerG,WiefelH(1997)4.2Fränkisch-ThüringischesSchiefergebirge(2).In:StratigraphischeKommissionDeutschlands (ed)StratigraphievonDeutschland II,Teil I:Thüringen,Sachsen,Ostbayern.CourForschInstSenckenberg200:57-102.

SdzuyK,HammannW,VillasE(2001):TheUpperTremadocfaunafromVogtendorfandtheBavarianOrdovicianoftheFrankenwald(Germany).Senckenbergianalethaea81:207-261.