Journal of the Czech Geological Society 44/3ñ4(1999) 327

Joachim Barrande and the of Paleozoic in Anjou (Armorican Massif)

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HUBERT LARDEUX

Universite de Rennes 1, Institut de Geologie, 35042 Rennes Cedex

South-East of the Armorican Massif, the Anjou area, re- At the time when paleontologists from Angers started presents a region distinguished by a special development their research (for example G. Ferronnière, later J. PÈ- (H. Lardeux and P. Cavet, 1994). The various Structural neau to mention only the first two), they used the remar- units that compose it, are considered to be separate, de- cable ìSystème Silurien du centre de la Bohêmeî by Jo- limited by faults of W-NW/S-SE strike, having only few achim Barrande. However, they used also, a precious common features (Fig. 1). collection of Bohemian fossils determined and donated Fossiliferous outcrops are known for a long time and them by Joachim Barrande. One can still admire the per- some of them are famous due to their pecularities, rich- fect calligraphy of the labels of this collection containing ness of fossils or are significant from the view of histo- beautiful samples. ry of science, as they were studied by famous scientists. The inventory list that accompanied the collection of- This is the case for the pelites with Paradoxides of Mid- fers five kinds of information: the label number, the fos- dle Cambrian age from ClÈrÈ-sur-Layon whose facies and sil number, the fossilís name, the locality and the stage. fauna remind us of the classic Skryje outcrops in Bohe- In total, there are 310 ìlabel numbersî virtually corre- mia. It is also the case for the black limestones of La sponding to 310 species and 705 samples. There are thus Meignanne near Angers (LudlowñP¯ÌdolÌ), containing 106 species of , 70 species of cephalopods, many Bohemian bivalves, or for the Erbray Limestone 30 species of gastropods, 45 species of brachiopods, (PragianñEmsian) brought to fame by the significant 13 species of bivalves, 8 species of graptolites, 12 spe- monograph by Charles Barrois. This occurrence marked- cies of echinoderms. ly reminds the Bohemian KonÏprusy Limestone. The Thanks to Ivo Chlup·Ë (1983 and 1999), it is possi- same is true of the La Grange Limestone, near Chalon- ble to establish the correlation between Barrandeís ìsta- nes, of Emsian age, which shows a typical Bohemian fa- gesî and the formations recognised today. Ivo Chlup·Ëís cies and which is remarcably rich in conodonts, goniati- work also makes it possible to update the name of seve- tes and tentaculites (dacryoconarids). ral classic Bohemian localities.

Fig. 1. Paleozoic units of Anjou. A ñ Medio-North-Armorican Do- main; B1 ñ Saint-Julien-de-Vouvantes Unit: Rhenish affinities; B2 ñ Saint- Julien-de-Vouvantes Unit: Bohemian affinities; C ñ Lanvaux ñ Les-ponts- de-CÈ Unit; D ñ Saint-Georges-sur- Loire Unit; E ñ Sillon houiller de la Basse-Loire; F ñ Horst of PouillÈ; G ñ Ancenis Basin; H ñ Metamorphic rocks of Les Mauges Group. 328 Journal of the Czech Geological Society 44/3ñ4(1999)

There are too many publications about Paleozoic pa- Chlup·Ë, I. (1983): Stratigraphical position of Barrandeís paleontological leontology of Anjou to list them all here. There is much localities in the Devonian of Central Bohemia ñ »as. Mineral. Geol., to be gained by studying those devoted to general pale- 28, 261ñ276. Praha. ñ (1999): Barrandeís stratigraphic concepts, palaeontological localities ontological studies such as Charles Barrois (1989), Ge- and tradition ñ comparison with the present state. ñ J. Czech Geol. orge FerronniÈre (1920), Joseph PÈneau (1920), Doro- Soc., 44, 1ñ2, 3ñ30. Praha. thÈe Le Maitre (1934), or those devoted to fossils groups Erben, H. K. (1960): Primitive Ammonoidea aus dem Unterdevon such as trilobites: Jean Pillet (1972), brachiopods: Jani- Frankreichs und Deutschlands. ñ Neu. Jb. Geol. Pal‰ont., Abh., 110, ne LíHotellier-Videau (1970), goniatites: Heinrich Erben 128 pp. Ferronnière, G. (1920ñ1922): Le Calcaire de la Grange, prÈs Chalonnes (1960), conodonts: Maurice Lys and Aliette Mauvier (M et L). ñ Bull. Soc. Sci. Natur. de líOuest de la France, 3ème sÈrie, (1965), Pierre Bultynck (1989), tentaculites: Hubert Lar- 6, 1920, 120ñ139; 4ème sÈrie, 1, 1921, 1ñ34; 4ème sÈrie, 2, 1922, deux (1969), Muriel Vidal and al. (1994). 1ñ37. Joachim Barrandeís work has definitely played an im- Lardeux, H. (1969): Les Tentaculites díEurope occidentale et díAfrique portant role in the research done later in Anjou since du Nord. ñ Cah. PalÈont. du C. N. R. S., 238 pp. Lardeux, H. ñ Cavet, P. (1994): Paleozoic of the Ligerian Domain in some geological formations, and in particular those of J. D. Keppie (ed.): Pre-Mesozoic in France and related areas. Devonian age in Ancenis Basin, are remarcably similar Springer Verlag, 152ñ156. in their facies and fauna to the Bohemian units and as- Le Maitre, D. (1934): Etudes sur la faune des calcaires dÈvoniens du semblages. Bassin díAncenis. ñ MÈm. Soc. GÈol. du Nord, 12, 267 pp. We are deeply indebted to Joachim Barrande for pas- LíHotellier-Videau, J. (1970): Rhynchonellida de quelques gisements devoniens (Devonien infÈrieur et Eifelien) du Sud-Est du Massif sing on his collection. The emotion one feels when pic- armoricain. ñ ThÈse 3ème cycle UniversitÈ de Nantes, 220 pp. king up a sample from his collection reminds us of the Lys, M. ñ Mauvier, A. (1965): RÈsultats micropalÈontologiques huge amount of work that went into it and how this fa- (Conodontes) dans le Silurien et le DÈvonien infÈrieur de líAnjou. ñ mous scientist devoted his whole life to Paleozoic pale- MÈm. Bur. Rech. gÈol. min., 33, 1964, 59ñ60. . ontology. PÈneau, J. (1929): Recherches stratigraphiques et palÈontologiques dans le Sud-Est du Massif armoricain (synclinal de Saint-Julien-de- Submitted August 30, 1999 Vouvantes). ñ Bull. Soc. Sci. Natur. de líOuest de la France, 1928, 4Ème sÈrie, 8, 300 pp. Pillet, J. (1973): Les Trilobites du Devonien infÈrieur et moyen du Sud- References Est du Massif Armoricain. ñ MÈm. Soc. Et. scientifiques de líAnjou, 1, 307 pp. Barrois, C. (1889): Faune du Calcaire díErbray. MÈmoires de la SociÈtÈ Vidal, M. ñ Goujet, D. ñ Janvier, Ph. ñ Lardeux, H. (1994): Micro-restes GÈologique du Nord, 3, 348 pp. de VertÈbrÈs du Calcaire de la Grange, Devonien infÈrieur (Emsien) Bultynck, P. (1989): Conodonts from the la Grange Limestone (Emsian), du Sud-Est du Massif Armoricain. ñ Neu. Jb. Geol. Pal‰ont., Abh., Armorican Massif, North-Western France. ñ Cour. Forsch.-Inst. 94, 2ñ3, 321ñ341. Stuttgart. Senckenberg, 117, 173ñ203. Frankfurt a. M.