Cenomanian Through Lower Coniacian Events in the Upper Cretaceous of Saxony, Germany
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Acta Geologica Polonica, Vol. 54 (2004), No.4, pp. 629-638 Cenomanian through Lower Coniacian events in the Upper Cretaceous of Saxony, Germany KARL-ARMIN TROGER Belgakademie FreibeJg (TU), Geological Institute, ZeunerstJ: 12 (MeifJer building), Fi·eiberg/Sa. D 09596,Gelmany. E-mail: [email protected] ABSTRACf: TROGER, K.-A. 2004. Cenomanian through Lower Coniacian events in the Upper Cretaceous of Saxony, Germany.Acta Geologica Polonica, 54 (4), 629-638. Warszawa. The event sequence recognised in the Cenomanian through basal Coniacian (Late Cretaceous) of the Elbe Valley is com pared with the event stratigraphic scheme worked out in NW Germany. The following events, recognised originally in Lower Saxony, and subsequently in other Cretaceous areas of north-western Europe, were found in Saxony: Schloenbachia / vilgatus eustatoevent (Lower Cenomanian); Chondlites ecoevent, Puzosia eustatoevent and plenus eustatoevent (Upper Cenomanian); hattini ecoevent, Mytiloides ecoevents, hercynicus ecoevent, Hyphantoceras ecoevent, Didymotis ecoevents and waltersdoifensis ecoevent (Turonian); erectus ecoevent; hannovrensis ecoevent, and incostans ecoevent (Lower Coniacian). Both the oxic/anoxic CenomanianlTuronian boundary event and the facies change at the base of the Metoicoceras geslinianum Zone are recognisable. With the exception of the Mytiloides ecoevents, recorded in all facies types, all the events are well developed only in the marly-silty facies. Local events, specific to the Cretaceous of Saxony are: the Late Cenomanian Pennrich event, known from the Sudetic area, and the Middle Turonian rhynchonellid events, occur ring in sandy and transitional facies between Pima and Bad Schandau. Keywords: Upper Cretaceous, Saxony, Elbe Valley, Cenomanian, Turonian, Coniacian, Event stratigraphy, Global and local events, Eustatoevent, Ecoevent, Tectoevent, Inoceramids. INTRODUCTION and early Turonian successions, which was termed Oceanic Anoxic Event by SCHLANGER & JENKYNS The first integrated stratigraphic investigations were (1976). Eleven eustoevents are particularly important carried out by ERNST, SCHMID, KELLER, KLrSCHIES and for detailed correlation in NW Germany. They are SEIBERTZ (see ERNS'I' & al. 1979a, b) in the region of marked by rapid transgressions or regressions, glau Braunschweig and Hannover, Lower Saxony. An event conitic horizons, hardgrounds, concretionary horizons, stratigraphic concept for the Cenomanian and Turonian hiatuses, fossiliferous horizons and facies changes. successions in NW Germany (Lower Saxony, Munster Other events are developed more locally, for example in land Basin) was introduced a few years later by ERNST areas of rising salt structures. Additional investigations & al. (1983 - in cooperation with S. KELLER and c.J. concerning the events and their global and local impor WOOD). They distinguished and described eustato tance were carried out by KAPLAN & SCHMID (1983), events, ecoevents, tephroevents (tuffite layers), tecto KAPLAN (1998a, 1998b) - Munsterland Basin, events, litho events and phyloevents, in addition to the HrLBREcHT & al. (1986 - Lower Saxony), HrLBRECHT & global organic carbon burial event in late Cenomanian DAHMER (1994 - Lower Saxony, Munsterland Basin), 630 KARL-ARMIN TROGER DIEDRICH (2000 - Miinsterland Basin), LEHMANN (1999 mental zone of the Elbe Valley, between MeiBen, - Miinsterland Basin), NIEBUHR & al. (1999 - Lower Dresden, Pima and Bad Schandau. This was one of the Saxony), HORNA (1996 - Subhercynian Cretaceous main connections between the Cretaceous basins of NW Basin), WOOD & ERNST (1998 - Lower Saxony). Event Germany and the Cretaceous North Bohemian Basin stratigraphic and sequence stratigraphic investigations in (Czech Republic) (Text-fig. 1) and, in a more general the Cretaceous of the Elbe Valley were first undertaken context, between the Tethyan Realm in the south and the by TROGER & VOIGT (1995). The Cenomanian through North Thmperate Realm in the north. Due to subse Turonian events of Germany, with particular reference quent erosion no Cretaceous strata are preserved in the to the Middle Cenomanian primus event, the Mid Elbe valley NW of MeiBen. Cenomanian event and the Late Turonian Hyphantoceras Faunal migrations took place both from the NW to event, were reviewed by DAHMER & ERNST (1986). The the SE and from the SE to the NW Isolated, mainly terminal Turonian Didymotis events in the Czech Cenomanian, erosional outliers are situated south of the Republic were detailed by CECH (1989). Summarized Elbe Valley Cretaceous (Text-fig. 2A), for example, the representations of the Cenomanian through basal Tharandter Wald (Cenomanian, lowermost Turonian), Coniacian events in Germany are given recent publica the Dippoldiswalder Heide (Cenomanian), the tions (HISS & al. 2000 and MUTTERLOSE & al. 1998). Paulsdorfer and Hockendorfer Heide (Cenomanian) The main objectives of this paper are: (1) and the Reinhardtsgrimmer Heide (Cenomanian). The Comparison of the Cenomanian, Turonian and basal Elbe Valley Cretaceous basin was bounded by the West Coniacian events of NW Germany with those in Saxony; Sudetic Island to the north and the Mid European Island (2) Investigation of the local events in the Elbe Valley to the southwest. Small tectonic movements influenced Cretaceous; and (3) Presentation of the influence of sedimentation. This is shown by the existence of small facies changes on the distribution of events in Saxony. Cenomanian NW-SE and NE-SW striking island chains and by the formation of a boundary trough (sensu VOIGT 1963) south of the West Sudetic Island and immediately PALAEOGEOGRAPHY OF THE ELBE VALLEY south of the Lausitz Fault (overthrust). IN THE CRETACEOUS To the Upper Cretaceous of Saxony also belongs the Upper Cretaceous of the Zittau Mountains (Upper The Upper Cretaceous of Saxony (Cenomanian Cenomanian - Lower Coniacian) (Text-fig. 2), which forms through basal Coniacian) is situated mainly in the linea- part of the North Bohemian Cretaceous (Cenomanian '. 'PO'$ "~ OBerlin ',Poland Magdeburg Germany •,i"'-, .......... :',: '-'-""%1.' ""'& ", -- , -- _ _ _ _ ~~ipzigo (-'-.-.';.. ". /CI,st. "j -----'-c:-tz" ;:J", '" "lJcI Mid-European Island -~_--~t) .. ·· ""~~~~,~~~,,~~~j,/ I----------........,--.-.~ hemian-' D Elbe Valley Cretaceous ····~~orth60 us Basin cretaceo -"Direction of the Lower ---Cenomanian transgression Tethyal influence ~ Direction of the Upper Cenomanian transgression Czech Republic Fig. 1. Palaeogeographical situation of the Cretaceous of the Elbe Vallcy in central Europe UPPER CRETACEOUS OF SAXONY 631 • i A i o .A.IJ.Il ......"d "- Zittau ', .... ,.,," Freiberg Germany N Bohemian Cretaceous Czech Republic ....... I I I II land area sandy facies 1-,-,-,-,-1 marly facies Kf = Karsdorf fault Nf = Niederwartha fault c=J Cenomanian layers small islands ( Pima - Schandau ) ; Lf = Lausitz fault cliffs ( Meii).en - Pima ) ~ c=:gJ Penn rich Sandstone type locality (overthrust to the S)' B West Sudetic Islan " o Bautzen .'..... +,J \';"'" ...... -.. ~<::.. / ..;.c .. ~~~/---T-.~+. --+---+----1 / ,~ " " ...J. ... ",'-I,., Zittau ...... \ O( , Freiberg ~~~F/-\ Cr~tace~~s - \~ ~ .. _ "" . Germany :;' Decin' ofthe Zlttau Mountams Middle European 10 20 ~ N Bohemian Cretaceous Islan ./ I I km; <JQ, Czech Republic ....... ' ......... 11 1 1 Iland area 1 _m ___ 1facies boundary B sandy facies 1transition facies ~ marly facies '--__-'I Lower through basal Middle Turonian Fig. 2. A. Distribution of the Pennrich Sandstone (+) and of the plenus event ( * ) (Upper Cenomanian) in the Elbe Valley Cretaceous including the Zittau Mountains; B. Distribution of the Mytiloides events (0) (Lower Turonian) in the Elbe Valley Cretaceous including the Zittau Mountains V-' '"N 0 BEvents in: Ie Events in: Events in: Ammonites 1 Events mainly IARhynChostreon Marly-silty Transition Sandy Inoceramids 2 I suborbiculatum lithofacies lithofacies lithofacies in: calcareous lithofacies Ammonite zones c Neocardioceras event _ 0 Macrofauna Neocardioceras juddii ~ ~ rare or missing qq E Y' 0 LL Inoceramus 1 1 2 Q c bohemicus Q) ~Pictus I I I s .t:: Event· • C '0 () U) Metoicoceras geslinianum lJ N pennriChfaun~K Plenus event :0 _* I a·o lJ 0 1-= =- _ Puzosia event m s;," T.+_ Chondrites events .-- --- -- ----~~--~- ;0 8- (1) .l: -- R n u c ~.S! " :ca 16 Calycoceras guerangeri o" -EE lenses with - poS Rhynchostreum - (Saxony: C. naviculare ) .00'" ~ suborbiculatum (') ";;;- eLL ~I T * AmDhidonte event (I) "~ Pycnodonte event "c;:- ::l " Sr s;, local event in the Elbe Valley Cretaceous 0 (/) Acanthoceras jukesbrownei ~ ~ * events in the Cretaceous of the MOnsterland; ;;:: <S1 C 3 0 Lower Saxony including the Subhercynian Q) z '" :;::; + :s;: "0. ro Cretaceous Basin and Saxony too_ I Turrilites acutus ~ r 0 ::l o E R regression Mid-Cenomanian event. Acanthoceras rhotomagense --- _. ~ "- "- Sternotaxis event 0 Rl ~ oE T transgression Discoidea event Q) :;0 (/) Turrilites costatus r (/) ro primus event m ~ :::l C K cliff facies ::l <S1 ro :0 s- .- J:: o Iu (/) - Cunningtoniceras inerme "- erg-"0. CD ".~m'lcommon Relative abundances -0 • CD - S' rare Key for the figures 2 and 3 (C I c Z ~ 0 r;; ~ ~ Orbirhvnchia event E Mantelficeras dixoni r §; 0 0 50 LL Schloenbachia / "0. c virgatus event - :2: ttl I m 'iii'" ~1 ~ I ~- ::;;"" --- Mariella event ;0 " Mantelficeras mantelfi Ultimus I Auce/~na.. ~v~~t- .. _~ Elbe valley Cretaceous including the Zittau Mts. Lower Saxony, Subhercynian Cretaceous Basin, Munsterland - ~ --~- ¥ Marly I Transition I Sandy IRhynChostreonl Inoceramid