Epicontinental Triassic, Volume 1

International Symposium, Halle/Saale, September 21-23, 1998

Ed.: Gerhard H. Bachmann; Ian Lerche

1999. XII, 402 pages, 127 figures, 14 tables, 4 plates, 15x23cm, 800 g
Language: English

(Zentralblatt für Geologie und Paläontologie, Teil I, Jg. 1998 Heft 7/8)

ISBN 978-3-510-66011-7, paperback, price: 92.00 €

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Triassic epicontinental paleogeography


Synopsis top ↑

The first volume of three starts out by presenting a synoptic overview of the whole Triassic period. The second part appraises the Early, Middle and Late Triassic. The third part considers regional characteristics and problems of Triassic rocks from Europe, North and South Africa, Eastern Europe, Svalbard, Asia and North and South America. The papers are regionally arranged and contain data and results of broad interest, far exceeding the regional aspects.

Central Europe is the type region of the classic epicontinental Triassic as defined by Alberti (1834), also referred to as the Germanic Triassic. Almost 50% of all the papers are in this section. The section South and Southeastern Europe, i.e. the northwestern Peri-Tethys, contains overview papers from Spain and Hungary, and draws attention to the important outcrops in Bulgaria and their faunas. Several contributions in the Africa section point to the important epicontinental deposits of the southwestern Peri-Tethys. Papers in the section on Eastern Europe, Svalbard and Asia cover a vast area, as exemplified by the sequence stratigraphic comparison of Svalbard and East Siberia. Other papers address paleontological and biostratigraphic aspects.

The Newark System of North America is described as a prime example of astronomically induced cyclicity. The redbeds of the Southwest are shown to be well suited for sequence stratigraphic interpretations and investigations of vertebrates. Another paper ably describes the South American connection to Gondwanaland, and corresponding shifts in climate and habitat for flora and fauna.

The purpose of these Proceedings is to enable fellow researchers from the information presented and, so that over the next decade or so, various aspects seen but murkily at present can be worked on. It is hoped that the variety of articles presented here will provide a framework for further investigation of the Triassic.

Rev.: Géochronique no. 75, 2000, p. 23 top ↑

Cet ouvrage, réparti en 3 volumes, rassemble les 52 contributions retenues à la suite d'un symposium international tenu en 1998 à Halle (Allemagne). Près des 2/3 de l'ouvrage, le volume 1 et une partie du volume 2, traitent surtout des aspects stratigraphiques et paléontologiques du faciès germanique d'Europe centrale, essentiellement de l'Allemagne; le volume 2 est complété par des travaux sur le Trias d'Espagne, de Hongrie et de Roumanie, ainsi que sur l'Afrique du Nord. Le dernier volume regroupe des études portant sur l'Afrique du Sud, l'Amérique du Nord, et sur des régions peu connues comme la Sibérie, le Caucase, le Kazakhstan, les îles de la mer de Barents et le Sud du Brésil.
De cet épais ouvrage on retiendra d'abord l'actualisation des connaissances sur le Trias d'Allemagne. La longue histoire des études de surface et les abondantes données de subsurface permettent d'établir finement la géométrie et l'évolution tectono-sédimentaire des bassins triasiques. L'emploi des méthodes de la i stratigraphique séquentielle et les corrélations fournies notamment par les palynofaciès, l'étude des Vertébrés et leurs traces aboutissent à une chronologie plus précise et à la reconstitution de l'eustatisme et des climats au cours du dépôts des faciès germaniques.
La synthèse à l'échelle de l'Afrique du Nord est également bienvenue. De la synthèse sur le Trias continental de l'Afrique du Sud, on attendra en pacurer le cadre géodynamique en compassion du Bassin du Kamo. Le Trias marin de de l'Est de la Sibérie sera pour beaucoup une découverte, de même pour celui du Kakzakhstan.
Cet ouvrage présente l'inconvénient majeur des actes de symposium: les thèmes aboyas dépendent des participants. Ainsi, des secteurs géogmphiques sont absents: aucun article sur l'Asie du Sud-Est l'Australie, l'Antarctique,le même sur la France - il est vrai que le Groupe Français du Dias s'est fait oublier. Rien non plus sur l'activité magmatique pourtant imposante au Trias. En conclusion, un ouvrage indispensable pour qui veut connaître l'état des lieux sur le faciès germanique d'Allemagne et les successions triasiques tu de quelque contrées lointaines.
J. Beauchamp
Géochronique no. 75, 2000, p. 23

Rev.: AAPG Bulletin, May 2001, p. 914/915 top ↑

He may even now - if I may use the phrase be wandering on some plesiosaurus-haunted Oolithic coral reef, or beside the lonely saline lakes of the Triassic Age. H. G. Wells, The Time Machine, 1895 I have dreams of traveling into the past, into Triassic time, either at the beginning Or the period or near its end. Once there I am untroubled by the insects or fearful of the reptiles. In these visions, frequently in color, there are no other people, and I do long for my kids and friends.

In my dreams, I want to understand what really happened. I have no desire to change past events. Few geologists take time travel seriously, nor do I. Practically, what one can do for a grand Triassic journey is buy these volumes. Reading them, we learn about the history of the only geologic period that is bounded by mass extinctions. The terminal Triassic extinction is of particular interest to me. A marine extinction "event" also took place near the Middle-Late Triassic boundary and I am in- terested in that too. From Triassic studies such as these, we dimly reconstruct part of our perilous past, those vital years from about Z45 to 205 million years ago.

Epicontinental seas are those situated on the continental shelf or on the continental interior. On all of the continents, there are Triassic rocks of epicontinental marine origin. From the Permian to the middle Late Triassic, seas that mollusks finally dominated slowly invaded the lands.

Of the 18 papers in volume 1, two thirds of them are specifically concerned with the German Triassic. As defined by Freidrich August von Alberti (1795-1878) in 1834, rocks of this age are present in a three-fold sequence based on color-red, white, and brown. Not unexpectedly, German geologists wrote most of these articles. Volume 2 contains eight papers on the Middle Triassic (all but one on the German Triassic), a paper on the Late Triassic (an ammonoid correlation of a horizon in Germany with one in the Dolomites), six papers on problems in southern and southeastern Europe (Spain, Hungary, Bulgaria), and five papers pertaining to North African problems (mostly on Moroccan localities).

These articles touch on palynology, vertebrate tracks, vertebrates, ammonoids, echinoderms, conodonts, bivalves, and brachiopods; there is a lot of stratigraphy. Fida a fine name-discusses the structural styles of the Moroccan Triassic basins; the paper contains extensive references. No other article takes up to any great extent the complete assembly of the supercontinent Pangea in the Early to Middle Triassic and the beginning of its fragmentation in the Late Triassic. Volume 3 begins well. The opening paper by P. J. Hancox on the continental Triassic of South Africa reawakens memorable days I spent in 1978 hammering rocks in the Karoo. (I am surprised, however, by the omission of the important studies by A. M. Anderson in what is a long list of references.) Seven papers on eastern Europe, Svalbard, and Asia follow. These deal primarily with paleontologic and stratigraphic research. Four articles on the North American Triassic, two of them by D. V. Kent and P. E. Olsen, come next. The final paper by Michael Holz and Claiton M. S. Scherer is about climates during Middle and Late Triassic time in what is now southernmost Brazil; initially semi-arid, the humidity increased during the Middle and Late Triassic.

This collection, addressed to students of the early Mesozoic, will speak to many others as well. It is not, however, a coherent step forward but, rather, a group of interesting papers. We see at once that H. G. Wells' time traveler would have had no trouble finding saline (or fresh water) lakes to loll about in. For plesiosaurs, the Jurassic was a better time.

AAPG Bulletin, May 2001, p. 914/915

Contents top ↑

Acknowledgements VII
BACHMANN, G.H. & LERCHE, I.: The Epicontinental Triassic: Preface IX
LUCAS, S.G.: The epicontinental Triassic, an overview (with 9 figures) 475
LUCAS, S.G.: Tetrapod-based correlation of the nonmarine Triassic (with
6 figures) 497
KOZUR, H.W.: Remarks on the position of the Norian-Rhaetian boundary
(with 1 figure and 4 tables) 523
Central Europe (Germanic Triassic)
cycles in the Trissic of the South-German Basin: a short progress report
(with 1 figure) 537
GELUK, M.C.: Palaeogeography and structural development of the Triassic
in the Netherlands - new insights (with 13 figures and 1 table) 545
FRISCH, U. & KOCKEL, F.: Quantification of Early Cimmerian movements in
NW-Germany (with 11 figures and 1 table) 571
FIJALKOWSKA-MADER, A.: Palynostratigraphy, Palaeoecology and
Palaeoclimatology of the Triassic of South-Eastern Poland (with 4
plates, 5 figures and 3 tables) 601
SCHOCH, R.R. & WERNEBURG, R.: The Triassic labyrinthodonts from
Germany (with 2 figures) 629
HAGDORN, H. & RAPPEL, O.: Stratigraphy of marine reptiles in the
Triassic of Central Europe (with 4 figures) 651
Early Triassic
STRUNCK, P., GAUPP, R. & STEFFAN, M.: Early Triassic movement of Upper
Permian (Zechstein) salt in Northwest Germany (with 10 figures) 679
KOZUR, H.W.: The correlation of the Germanic Buntsandstein and
Muschelkalk with the Tethyan scale (with 5 figures) 701
GELUK, M.C. & RÖHLTNG, H.-G.: High-resolution sequence stratigraphy of
the Lower Triassic Buntsandstein: A new tool for basin analysis (with
7 figures and 2 tables) 727
WEBER, J. & RICKEN, W.: Fluvial architecture and silica diagenetic
pattern of the Solling Folge (Reinhardswald trough, Solling area, NW
Germany) (with 10 figures) 747
SIMON, T.: Geochemical investigations at the Buntsandstein/Muschelkalk
boundary in Southwest Germany (with 8 figures) 769
HAUBOLD, H.: Tracks of the Dinosauromorpha from the Lower Triassic
(with 9 figures and 2 tables) 783
RÖHLING, H.-G: The Quickborn Sandstone - a new lithostratigraphic unit
in the lowermost Middle Buntsandstein (Scythian) (with 6 figures and 1
table) 797
Middle Triassic
SZULC, J.: Anisian-Carnian evolution of the Germanic basin and its
eustatic, tectonic and climatic controls (with 12 figures) 813
BRACK, P., RIEBER, H. & URLICHS, M.: Pelagic successions in the
Southern Alps and their correlation with the Germanic Middle Triassic
(with 8 figures) 853