Introduction
This issue of Acta Geologica Polonica is dedicated to the late Professor Gundolf Ernst,
who passed away on 25 April 2002. It is a tribute from his friends, colleagues and research students. This special extended
part contains papers on a great diversity of Cretaceous topics, including belemnites, biostratigraphy, event stratigraphy,
sequence stratigraphy, tephrostratigraphy, Campanian echinoids and ammonites, inoceramids, and the tectonics of the Subhercynian
Cretaceous Basin. All of these are topics that were close to Gundolf’s heart and on which he himself made major contributions.
Two personal reminiscences of Gundolf have been specially written for this memorial part by his close friends, Friedrich Schmid
and Christopher Wood. An obituary, together with a complete bibliography, was recently published in Mitteilungen aus dem
Geologisch-Paläontologischen Institut der Universität Hamburg (volume 87, 2003)
With Gundolf’s passing the ‘Cretaceous family’ has lost an outstanding researcher and inspiring teacher.
The Editors
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A revision of the ammonite types described in F. Roemer’s ‘Die Kreidebildungen von Texas und ihre organischen Einschlüsse’ (1852)
KENNEDY W. J.1, HANCOCK J. M. 2, COBBAN W. A. 3, LANDMAN & NEIL H. 4
1Geological Collections, University Museum, Parks Road, Oxford, OX1 3PW, U.K.
Jim.Kennedy@earth.ox.ac.uk
2Imperial College of Science, Technology and Medicine, Royal School of Mines, Prince Consort Road, London SW7 2BP, U.K.
370 Estes Street, Lakewood, Colorado 80226, U.S.A.
4Department of Invertebrates, American Museum of Natural History, Central Park West at 79th Street, New York, New York 10024, U.S.A.
Landman@amnh.org
ABSTRACT: The type material of the ammonites described in F. Roemer’s ‘Die Kreidebildungen
von Texas und ihre organischen Einschlüsse’ (1852) is revised, and referred to Nowakites flaccidicosta
(Roemer, 1852), Texasia dentatocarinata (Roemer, 1852), Placenticeras syrtale (Morton, 1834), Texanites
(Texanites) texanus texanus (Roemer, 1852), Texanites (Texanites) roemeri (Yabe & Shimizu,
1923), Mariella (Wintonia) brazoensis (Roemer, 1852), Baculites asperoanceps Lasswitz, 1904, Baculites
sp., and Scaphites (Scaphites) semicostatus Roemer, 1852.
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Early Late Campanian ammonite fauna from Busko Zdrój (Nida Trough, southern Poland)
MACHALSKI M.1, KENNEDY W. J.2, KIN A.3
1Instytut Paleobiologii PAN, ul. Twarda 51/55, PL-00-818 Warszawa, Poland.
mach@twarda.pan.pl
2Geological Collections, Oxford University Museum of Natural History, Parks Road, Oxford
Jim.Kennedy@earth.ox.ac.uk
3Geological Association ‘Phacops’, ul. Targowa 29, PL-90-550 Lodz
adriankin@phacops.org
ABSTRACT: Sixteen ammonite taxa are recorded from four temporary exposures of lower Upper
Campanian deposits in the town of Busko Zdrój, NE limb of the Nida Trough, southern Poland. These are: Phylloceras
(Neophylloceras) cf. bodei, Tetragonites obscurus, Desmophyllites sp., Pachydiscus (Pachydiscus) subrobustus, P. (P.)
cf. subrobustus, Hoplitoplacenticeras (Hoplitoplacenticeras) dolbergense, H. (H.) sp., H. (Lemfoerdiceras) lemfoerdense,
Glyptoxoceras cf. retrorsum, G. sp., Lewyites elegans, Pseudoxybeloceras (Pseudoxybeloceras) riosi, Ps. (Ps.) sp. juv.,
Baculites sp., Scaphites gibbus, and Trachyscaphites spiniger spiniger. Many specimens lack precise provenance data, but
co-occurrence of T. obscurus, P. (P.) subrobustus, H. (H.) dolbergense, H. (L.) lemfoerdense, Ps. (Ps.) riosi, Baculites
sp., S. gibbus, and T. s. spiniger is documented from a single opoka bed in one of the exposures. The ammonites allow
correlation with standard sections in northern Germany: the ammonite-bearing sequence of Busko Zdrój corresponds to a
part of the interval from the basiplana / spiniger to roemeri zones in Lägerdorf and Kronsmoor (Schleswig-Holstein), and
from the stobaei / basiplana to vulgaris / stolleyi zones in the Lehrte West Syncline (Lower Saxony). It can also be
correlated with the lower part of the Neancyloceras phaleratum Zone in Vistula valley, central Poland.
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Late Campanian nostoceratid ammonites from the Lehrte West Syncline near Hannover, northern Germany
NIEBUHR B.
Bayerische Julius-Maximilians-Universität, Institut für Paläontologie, Pleicherwall 1, D-97070 Würzburg, Germany.
niebuhr@mail.uni-wuerzburg.de
ABSTRACT: The nostoceratid ammonites Nostoceras (Didymoceras) postremum (Blaszkiewicz, 1980) and
Nostoceras (Didymoceras) varium (Blaszkiewicz, 1980) are described from northern Germany for the first time. They appear with
the second occurrence of Nostoceras (Bostrychoceras) polyplocum (Roemer, 1841) in the upper portion of the Neancyloceras
bipunctatum / Galerites roemeri Zone of the Lehrte West Syncline (Lower Saxony, east of Hannover), which is equivalent to
the upper Belemnitella langei Zone of the chalk of Lägerdorf-Kronsmoor (c. 50 km north of Hamburg). In northern Germany,
this ammonite association appears c. 1 Ma earlier than Belemnella lanceolata, which marks the base of the Maastrichtian
in belemnite terms, and c. 1.5 Ma earlier than the international base according to the first occurrences of Diplomoceras
cylindraceum and Pachydiscus neubergicus at Lägerdorf-Kronsmoor. Assuming that the GSSP of the base of the Maastrichtian
Stage at Tercis (southern France) equals the boundary of the U.S. Western Interior (radiometric age 71.3 ± 0.5 Ma),
Nostoceras (Bostrychoceras) polyplocum first appears in Europe c. 75 Ma before present.
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Latest Campanian to Early Maastrichtian (Cretaceous) nautiloids from the white chalk of Kronsmoor, northern Germany
WILMSEN M.1, ESSER K. J.K. 2
Institut für Paläontologie der Bayerischen Julius-Maximilians-Universität, Pleicherwall 1, D-97070 Würzburg, Germany
m.wilmsen@mail.uni-wuerzburg.de
Pommernweg 4, 25479 Ellerau/Holstein, Germany.
kjkesser@online.de
ABSTRACT: A well preserved and stratigraphically tightly constrained nautiloid fauna consisting of
two species is described from the uppermost Campanian to Lower Maastrichtian white chalk section of Kronsmoor, northern Germany.
Cymatoceras patens (Kner, 1848) occurs rather frequently in the Kronsmoor section; one specimen is from the Upper Campanian
Micraster grimmensis/Cardiaster granulosus Zone, one from the upper Belemnella pseudobtusa to lowermost Belemnella obtusa Zone.
The bulk of the material (nine specimens) is from the Early Maastrichtian B. obtusa and Belemnella sumensis zones. The species
is known from the Upper Campanian to Lower Maastrichtian of northern Germany, The Netherlands, Poland, the Ukraine, and possibly
Denmark. Cymatoceras loricatum (Schlüter, 1876) occurs in Kronsmoor (four specimens) in an interval comprising the Early
Maastrichtian upper B. obtusa to B. sumensis zones. The species was hitherto only recorded from the uppermost Lower and Upper
Campanian of Westphalia and Lower Saxony, Germany. Both species appear to be restricted to the Central European Subprovince of
the temperate North European Province (Boreal Realm).
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Correlation of the Barremian belemnite successions of northwest Europe and the Ulyanovsk - Saratov area (Russian Platform)
BARABOSHKIN E. J.1, MUTTERLOSE J.2
1Geological Faculty, Moscow State University, Leninskie Gory, 119992, Moscow, Russia.
Barabosh@geol.msu.ru
1Institut für Geologie, Mineralogie und Geophysik, Ruhr-Universität Bochum, Universitätsstrasse 150, D-44801 Bochum, Germany.
joerg.mutterlose@rub.de
ABSTRACT: The marine sedimentary successions of Barremian age yield, both in northwest Europe and on
the Russian Platform, diverse and abundant belemnite faunas. These include the genera Praeoxyteuthis, Aulacoteuthis and
Oxyteuthis and are attributed to the boreal belemnite family Oxyteuthididae. The Oxyteuthididae are endemic to northwest
Europe (northern Germany, northeast England, North Sea) and the Russian Platform, where they evolved in isolation. They
possibly derived from the belemnite genus Acroteuthis in late Hauterivian time. Phylogenetically they are interpreted as
the latest off shoot of the Belemnitina, which became extinct in the early Aptian. Since ammonites are extremely rare on
the Russian Platform oxyteuthid belemnites have been used to establish a biozonation scheme with seven belemnite zones
(from bottom to top): Praeoxyteuthis hibolitiformis Zone (early Barremian), Praeoxyteuthis jasikofiana Zone
(early Barremian), Praeoxyteuthis pugio Zone (earliest Barremian), Aulacoteuthis descendens Zone (late early
Barremian), Oxyteuthis brunsvicensis Zone (early late Barremian), Oxyteuthis germanica Zone
(late Barremian), and Oxyteuthis lahuseni Zone (latest Barremian/Aptian). Apart from the O. lahuseni
Zone this zonation can be correlated to the well established belemnite scheme of northwest Europe, allowing a detailed
correlation of the Barremian of both areas.
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Belemnites of the Bohemian Cretaceous Basin in a global context
KOSTAK M1, CECH S.2, EKRT B.3, MAZUCH M.1, WIESE F.4, VOIGT S.5, WOOD C. J.6
1Institute of Geology and Palaeontology, Charles University, Albertov 6, Prague 2, 128 43, Czech Republic.
kostak@natur.cuni.cz
mmazuch@centrum.cz
2Czech Geological Survey, Klárov 3, 118 21, Czech Republic.
cech@cgu.cz
3National Museum, Václavské námesstí 68, Prague 1, 115 79, Czech Republic.
ekrtb@nm.cz
44Fachrichtung Paläontologie, FU Berlin, Malteserstr. 74-100, D-12249 Berlin.
frwiese@snafu.de
5Geological Institute, University of Cologne, Zülpicher Str. 49a, D-50764 Cologne, Germany.
silke.voigt@uni-koeln.de
6Periton Lane, Minehead, Somerset, TA24 8AQ, UK.
chrisjwood@btopenworld.com
ABSTRACT: Belemnites occur infrequently from the Upper Cenomanian through the Middle/Upper Coniacian
in the Bohemian Cretaceous. Four species of the family Belemnitellidae Pavlow, 1914 have been described so far. A typical boreal
faunal incursion, represented by belemnites, happened five to six times in the Bohemian Cretaceous Basin (BCB). Praeactinocamax
plenus immigrated during the Late Cenomanian Metoicoceras geslinianum ammonite Zone (plenus Event); there were two short-term
incursions of P. bohemicus in the Late Turonian (Subprionocyclus neptuni to Prionocyclus germari ammonite zones) and an incursion
of Goniocamax lundgreni in the late Early Coniacian (below and intra-Cremnoceramus crassus inoceramid Zone). A single belemnite
fragment was recorded from the ‘Chlomek Beds’; Middle to Upper Coniacian. Bohemian Cretaceous belemnite systematics,
palaeobiogeography (including palaeobiogeographic maps reconstructed), palaeoecology (including the relationship to other
coleoid groups ? i. e. teuthids) and stratigraphy are discussed.
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What is Inoceramus peruanus Brüggen, 1910 ?
DHONDT A. V.1, WALASZCZYK I.2, TCHEGLIAKOVA N.3, JAILLARD E.4
1Royal Belgian Institute of Natural Sciences, Vautierstr. 29, B-1000 Brussels, Belgium.
annie.dhondt@naturalsciences.be
2Department of Geology, Warsaw University, Al. Zwirki i Wigury, 93, PL-02-089 Warsaw, Poland.
i.walaszczyk@uw.edu.pl
3Departamento de Geociencias, Facultad de Ciencias, Universidad Nacional de Colombia, Santa Fé de Bogota, Colombia.
nadejda@ciencias.unal.edu.co
4IRD-LGCA, Maison des Géosciences, BP 53, 1381 rue de la Piscine, F-38041 Grenoble Cedex.
Etienne.Jaillard@ujf-grenoble.fr
ABSTRACT: The figured holotype of the Lower Turonian Inoceramus peruanus Brüggen, 1910
from Peru was found in the collections of the Goldfuss Museum in Bonn. Its general shape is close to that of Mytiloides
goppelnensis (Badillet & Sornay) and M. kossmati (Heinz), and is a Mytiloides. The ornamentation
consists of the double-rugae typical of M. kossmati. The presence of M. peruanus in Peru, Ecuador and Colombia
is discussed.
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New observations on the inoceramid biostratigraphy of the higher part of the Upper Turonian and the Turonian - Coniacian boundary transition in Poland, Germany and the UK
WOOD C. W.1, WALASZCZYK I.2, MORTIMORE R.3, WOODS M.4
1Scops Geological Services Ltd., 31 Periton Lane, Minehead, Somerset, TA24 8AQ. UK.
chrisjwood@btopenworld.com
2Department of Geology, Warsaw University, Al. Zwirki i Wigury, 93, PL-02-089 Warsaw, Poland.
i.walaszczyk@uw.edu.pl
3Applied Geology Research Unit, School of the Environment, University of Brighton.
r.n.mortimore@brighton.ac.uk
4British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK.
maw@bgs.ac.uk
ABSTRACT: New studies of sections in southern England (Bridgewick Pit, Downley, Shoreham Cement Works
Quarry), eastern England (Kiplingcotes Station Quarry, Arras Road Pit), Germany (Salzgitter-Salder Quarry, a potential candidate
GSSP for the Coniacian Stage,) and central Poland (Slupia Nadbrzezna, another potential candidate GSSP) have enabled a
re-evaluation and refinement of the inoceramid biostratigraphy of the higher part of the Upper Turonian and the
Turonian-Coniacian boundary transition. The inoceramid record at Slupia Nadbrzezna below the terminal Turonian entry of
Cremnoceramus is shown to be more complete than at the standard Salzgitter-Salder Quarry section. A new inoceramid event
(Inoceramus lusatiae Event) identified at Slupia Nadbrzezna is inferred to be present at the Sonnenberg Quarry,
Waltersdorf, the type locality of Inoceramus lusatiae, as well as of I. glatziae and Cremnoceramus
waltersdorfensis, and it is possibly represented in the condensed Navigation Hardgrounds in southern England.
The absence of this event at Salzgitter-Salder suggests a significant hiatus. An inoceramid assemblage characterised
by a taxon of uncertain affinities that immediately precedes the flood occurrence of Cremnoceramus
(waltersdorfensis I Event) at Salzgitter-Salder has been identified at a comparable biostratigraphic
position in eastern England (Yorkshire) and, tentatively, also in southern England. Inoceramids from this
assemblage in the UK had previously been incorrectly assigned to Cremnoceramus waltersdorfensis and the basal
Coniacian marker taxon, C. deformis erectus. The position of the base of the Coniacian has accordingly been
revised upwards in both the southern and eastern England successions.
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Additional records of Late Cretaceous and Early Palaeogene echinoids from the Gschliefgraben (Ultrahelvetic, Upper Austria)
KROH A.1, JAGT J.W.M.2 with contributions by WAGREICH M.3
1Institut für Erolwissenschsfaten, Karl-Franzens-Universität Graz, Heinrichstraße 26, A-8010 Graz, Austria; present address: Naturhistorisches Museum, Geologisch-Paläontologische Abteilung, Burgring 7, A-1014 Wien, Austria.
discometra@gmx.at
2Natuurhistorisch Museum Maastricht, de Bosquetplein 6, NL-6211 KJ Maastricht, the Netherlands.
john.jagt@maastricht.nl
3Institut für Geowissenschaften, Universität Wien, Geozentrum, UZA II, Althanstraße 14, A-1090 Wien, Austria.
michael.wagreich@univie.ac.at
ABSTRACT: Late Cretaceous and Early Palaeogene echinoid faunules collected in recent years from the
surface of an active mudflow at the Gschliefgraben near Gmunden (east of the Traunsee, Upper Austria) are both fairly diverse
and of considerable palaeobiogeographic interest. So far, only (Late) Campanian taxa have been described and illustrated. In
the present paper, notes are presented on additional Campanian, Maastrichtian and Palaeogene taxa, namely Lampadocorys?
estermanni sp.nov., Lampadocorys? sp.nov. 1, Lampadocorys? sp.nov. 2, Rispolia cf. subtrigonata
(Catullo), Seunaster cf. heberti (Seunes), Echinocorys ancileformis Moskvin & Shimanskaya,
Echinocorys ex gr. fonticola Arnaud, Ganbirretia? sp., Micraster aturicus Hébert in
Seunes, Micraster corcolumbarium Desor, Micraster stolleyi (Lambert in de Grossouvre), Pseudogibbaster?
sp., and Coraster beneharnicus Seunes. These species indicate a close relationship with the Tethyan areas of northern
Spain and SW France, the Crimea, Georgia and the northern Caucasus, although a number of holasteroid and micrasterid taxa would
appear to be more common and widely distributed in boreal settings (e.g., NW Europe).
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Linking southern Poland and northern Germany: Campanian cephalopods, inoceramid bivalves and echinoids
JAGT J. W. M.1, WALASZCZYK I.2, YAZYKOVA E. A.3, ZATON M.3
1Natuurhistorisch Museum Maastricht, de Bosquetplein 6, NL-6211 KJ Maastricht, the Netherlands.
john.jagt@maastricht.nl
2Department of Geology, Warsaw University, Al. Zwirki i Wigury, 93, PL-02-089 Warsaw, Poland.
i.walaszczyk@uw.edu.pl
33Department of Ecosystem Stratigraphy, Faculty of Earth Sciences, Bêdziñska Str. 60, PL-41-200 Sosnowiec, Poland
ABSTRACT: The Campanian strata in the Wolbrom-Miechów area at Wierzchowisko,
Jeżówka and Rzeżuśnia (i.e., the southwestern part of the Miechów Trough, southern Poland)
have been studied in some detail. Collections of macrofossils available to date include generally well-preserved and diverse
cephalopods (ammonoids, coleoids), inoceramid bivalves and irregular echinoids of considerable stratigraphic and correlative
value. For the present paper, taxa which allow a preliminary correlation with northern Germany (Lägerdorf, Lehrte West
Syncline and Münsterland Basin) are singled out for brief discussion. Stratigraphically useful taxa include the ammonites
Pachydiscus (P.) haldemsis (Schlüter), Lewyites elegans (Moberg), Scaphites (S.) hippocrepis III sensu Cobban, S. (S.)
gibbus Schlüter and Trachyscaphites s. spiniger (Schlüter), the coleoids Belemnitella ex gr. mucronata (von Schlotheim)
and Gonioteuthis quadrata (de Blainville), the inoceramids Cataceramus dariensis (Dobrov & Pavlova), ‘Inoceramus’
azerbaydjanensis Aliev and ‘I.’ agdjakendsis Aliev, and the echinoids Offaster pilula (Lamarck), Galeola papillosa
(Leske), Echinocorys ex gr. subglobosa/turrita, E. ex gr. conica, Micraster (Gibbaster) ex gr. fastigatus/stolleyi and M. (M.)
ex gr. schroederi/glyphus. The ammonite fauna, which is dominated by pachydiscids and diplomoceratids, is closely comparable to
that from the Busko Zdrój area (i.e., the southeastern part of the Miechów Trough), but hoplitoplacenticeratids
are still unknown from the Wolbrom-Miechów area which, taken together with inoceramid data, may point to a gap in the
upper Lower Campanian (equivalent of conica/mucronata Zone).
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Biostratigraphy of the Santonian in the SW margin of the Holy Cross Mountains near Lipnik, a potential reference section for extra-Carpathian Poland
REMIN Z.
Institute of Geology, Warsaw University, Zwirki i Wigury 93, PL-02-089 Warszawa, Poland.
zbyh@uw.edu.pl
ABSTRACT: The set of outcrops near the village of Kije, on the SW margin of the Holy Cross Mountains
provides a nearly complete Santonian succession that has a great potential to become a Santonian reference section in Poland.
The Coniacian/Santonian boundary is defined here by the first occurrence (FO) of the inoceramid bivalve species Cladoceramus
undulatoplicatus (Roemer 1852). The uppermost Santonian is characterized by common Sphenoceramus patootensiformis
(Seitz 1965). The top of the stage (and the base of the Campanian Stage) is documented by the last occurrence (LO) of the crinoid
species Marsupites testudinarius (Schlotheim 1820). The substage division of the Santonian is based on inoceramids, with
the lower boundary of the Middle Santonian indicated by the LO of Cladoceramus undulatoplicatus and the base of the Upper
Santonian by the FO of representatives of Cordiceramus muelleri (Petrascheck 1906) group.
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Inoceramid/foraminiferal succession of the Turonian and Coniacian (Upper Cretaceous) of the Briansk region (Central European Russia)
WALASZCZYK I.1, KOPAEVICH L. F.2, OLFERIEV A. G.3
1Department of Geology, Warsaw University, Al. Zwirki i Wigury, 93, PL-02-089 Warsaw, Poland.
i.walaszczyk@uw.edu.pl
2Moscow State University, Department of Historical Geology, Geology Faculty, Vorobievi Gori, MGU, 119899 Moscow, Russia
3Paleontological Institute RAS, Profsouznaya, 123, 113105 Moscow, Russia
ABSTRACT: An integrated inoceramid-foraminiferal zonation for the topmost Turonian and Lower Coniacian
near Briansk, SW of Moscow is presented. The inoceramid fauna enables the application of the refined zonal scheme currently
applied in central and western Europe. Three zones based on benthic foraminifera, the Gavelinella moniliformis,
Ataxophragmium nautiloides and Stensioeina granulata granulata zones; and three zones based on planktonic
foraminifera, the Whiteinella archaeocretacea, Marginotruncana pseudolinneiana and Marginotruncana renzi
zones, are distinguished. The Turonian/ Coniacian boundary, defined by the first appearance of the inoceramid Cremnoceramus
deformis erectus (Meek, 1877), falls within the basal part of the Stensioeina granulata granulata Zone and the basal
part of Marginotruncana renzi Zone. In foraminiferal terms the Turonian/Coniacian boundary interval is marked additionally
by a sudden, short-lived increase in the plankton/benthos ratio, caused primarily by more abundant shallow-water morphotypes.
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The mid-Cenomanian eustatic low
HANCOCK J. M.
Department of Earth Science and Engineering, Royal School of Mines, Imperial College, London SW7 2BP, U.K.
ABSTRACT: Through much of the earlier part of the Middle Cenomanian the sea-levels in western Asia,
northern Europe and the Western Interior of the U.S.A. were lower than during the later Early Cenomanian and most of the later
Middle Cenomanian. In north-west Europe the first sign of this Mid-Cenomanian Eustatic Low was just before the end of the Zone
of Cunningtoniceras inerme. There was then an abrupt and strong fall of sea-level at the base of Milankovitch couplet C 1, early
in the Subzone of Turrilites costatus. Sea-level continued to be low through couplets C 1 to C 3 for some 60,000 years: this is
the Mid-Cenomanian Regressive Trough. In western Germany it has been distinguished as the Primus Event. In north Texas and the
Western Interior of the U.S.A. the Trough occurred in the Zone of Conlinoceras tarrantense which can be dated as 95.78 ± 0.61 Ma.
A later regressive trough occurred at the start of the Subzone of Turrilites acutus, which is marked by the Mid-Cenomanian Event
in Germany. The overall lower sea-level from late in the Zone of C. inerme to early in the Subzone of T. acutus is the
Mid-Cenomanian Eustatic Low. It lasted some 300,000 years.
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Cenomanian through Lower Coniacian events in the Upper Cretaceous of Saxony, Germany
TRÖGER K.-A.
Bergakademie Freiberg (TU), Geological Institute, Zeunerstr. 12 (Meißer building), Freiberg/Sa. D 09596,Germany.
troeger@geo.tu-freiberg.de
ABSTRACT: The event sequence recognised in the Cenomanian through basal Coniacian (Late Cretaceous)
of the Elbe Valley is compared 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 / virgatus eustatoevent (Lower Cenomanian); Chondrites ecoevent, Puzosia
eustatoevent and plenus eustatoevent (Upper Cenomanian); hattini ecoevent, Mytiloides ecoevents,
hercynicus ecoevent, Hyphantoceras ecoevent, Didymotis ecoevents and waltersdorfensis
ecoevent (Turonian); erectus ecoevent, hannovrensis ecoevent, and incostans ecoevent (Lower Coniacian).
Both the oxic/anoxic Cenomanian/Turonian 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, occurring in sandy and transitional facies between Pirna and Bad Schandau.
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20 years of event stratigraphy in NW Germany; advances and open questions
WIESE F.1, WOOD C. J.2, KAPLAN U.3
1Fachrichtung Paläontologie, Institut für Geologische Wissenschaften der FU Berlin, Malteserstr. 74-100, D-12249 Berlin, Germany.
frwiese@snafu.de
2Scops Geological Services Ltd., 31 Periton Lane, Minehead Somerset, TA24 8AQ, UK.
chrisjwood@btopenworld.com
3Eichenalle 141, D-33332 Gütersloh, Germany.
u.k.kaplan@t-online.de
ABSTRACT: The application of event stratigraphy in the Cenomanian to Lower Coniacian (Upper Cretaceous)
Plänerkalk Gruppe of northwestern Germany has advanced stratigraphic resolution considerably. For a short interval in the Upper
Turonian, various genetically variable events (bioevents, tephroevents, stable isotope marker, eustatoevents) are reviewed and
new data are partly added. In addition, the lateral litho and biofacies changes within individual events are discussed and
provide a basis for a tentative high-resolution correlation between distal and proximal settings. The dense sequence of events
permits a stratigraphic resolution of 50 - 100ky for some intervals. Beyond stratigraphic purposes, the alternation of fossil
barren intervals with thin fossil beds still demands explanations. As taphonomic processes are considered to be play only a
minor role, other explanations are required. It appears that trophic aspects and a calibration of planktic and benthic faunal
assemblages may result in a better understanding of this biosedimentary system and its faunal characteristics.
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New advances in the stratigraphy and geochemistry of the German Turonian (Late Cretaceous) tephro- stratigraphic framework
WIESE F.1, WOOD C. J.2, WRAY D. S.3
1Fachrichtung Paläontologie, Institut für Geologische Wissenschaften der FU Berlin, Malteserstr. 74-100, D-12249 Berlin, Germany.
frwiese@snafu.de
2Scops Geological Services Ltd., 31 Periton Lane, Minehead Somerset, TA24 8AQ, UK.
chrisjwood@btopenworld.com
3Department of Earth & Environmental Sciences, The University of Greenwich, Pembroke, Chatham Maritime, Kent, ME4 4TB. UK.
wd01@gre.ac.uk
ABSTRACT: The lowest of the five bentonites in the German Turonian tephrostratigraphic framework, TC,
can be correlated for the first time from the Rotpläner (red limestone) standard section in the Söhlde-Loges Quarry
(Lower Saxony) to highly condensed, near-swell successions of the nearby Woltwiesche Quarry and the Hoppenstedt Quarry
(Saxony-Anhalt). A second bentonite, TC2, only recently recognised at Söhlde-Loges, is now identified at Woltwiesche and
in the distal/expanded white limestone successions of the Salzgitter-Salder Quarry and the Flöteberg road-cutting (both
Lower Saxony). TC2 can easily be located a short distance above a major lithofacies change (herein termed the Basal Upper
Turonian Facies Turnover), making it an isochronous marker permitting correlation between condensed near-swell and expanded
basinal sections. On this basis, a bentonite, previously identified as TC at Hoppenstedt must be re-assigned as TC2. Examination
of the major, trace, and rare-earth element (REE) data of all the five bentonites identified in Lower Saxony and Saxony-Anhalt
shows that it is possible to discriminate between them to some extent. Bentonites TC and TC2 are geochemically similar and
separable from TD, which is itself distinct from TE and TF.
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Late Cretaceous unconformities in the Subhercynian Cretaceous Basin (Germany)
VOIGT T.1, von EYNATTEN H.2, FRANZKE H.-J.3
1Institut für Geowissenschaften, Universität Jena, Burgweg 11, D-07749 Jena
2Geowissenschaftliches Zentrum der Universität Göttingen, Goldschmidtstr. 3, D-37077 Göttingen
3Institut für Geologie & Paläontologie, Technische Universität Clausthal, Leibnitzstraße 10, D-38678 Clausthal-Zellerfeld
ABSTRACT: In the Subhercynian Cretaceous Basin, six Upper Cretaceous angular unconformities can be
observed. The first unconformity, at the base of the Cenomanian transgressive deposits, is not related to the development of
the basin. While the second (Lower to Middle Coniacian) unconformity is almost limited to the northern basin margin, four
unconformities are developed at the Harznordrand Thrust and span the short period from the Middle Santonian to the late Early
Campanian (about 3 Ma). The intra-Coniacian unconformity at the northern basin margin proves tilting of the basin floor to the
south-east and is possibly related to the development of the thrust too. The Santonian to Campanian unconformities at the
Harznordrand Thrust reflect the formation of a continuously growing fault-propagation fold. Deposition above unconformities
occurred when the rate of eustatic sea-level rise exceeded thrusting rate. Transgressions occurred in the earliest Middle
Santonian, in the Late Santonian (intra-Marsupites Zone), in the earliest Campanian (granulataquadrata Zone) and
in the late Early Campanian (Offaster pilula Zone). The ages of unconformities correlate well with the transgressive
pulses proved in Western and Middle Europe and are not related to discrete deformational events.
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