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Carnets de Géologie / Notebooks on Geology

Carnets de Géologie
E-ISSN 1634-0744 (en ligne)
ISSN 1765-2553 (CD-ROM)
ISSN 2108-5196 (DVD-ROM)

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Highlights

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2014 (vol. 14) 

Paleocene larger foraminifera from the Yucatán Peninsula (SE Mexico)
Vicent VICEDO, José Antonio BERLANGA & Josep SERRA-KIEL

 | HTML  | PDF [11.544 KB]  | DOI : 10.4267/2042/53527

 Abstract:  The larger foraminifera found in the material from the Chichen Itzá Formation of Campeche (SE Mexico) were studied in detail. The architectural analyses allow the description of four new species and a new genus, namely, two agglutinated conical foraminifera, Coskinolina yucatanensis n.sp. and Pseudofallotella drobneae n. gen. n.sp., one new alveolinid, Borelis hottingeri n.sp., and one new rotaliid, Dictyoconoides boneti n.sp. The larger foraminifera of the Chichen Itzá Formation are distributed across two different associations: one includes Pseudofallotella drobneae, Neotaberina sp., Rhabdorites sp., Borelis hottingeri, Dictyoconoides boneti, Kathina sp., Miscellaneidae, Ranikothalia soldadensis and Hexagonocyclina cristensis, while the other assemblage is composed of Coskinolina yucatensis, Fallotella causae, Rhabdorites sp., Borelis floridanus and Cincoriola cf. ovoidea. Some of these genera, including Neotaberina and Dictyoconoides, are cited in the Caribbean paleobioprovince for the first time in this paper. The first association is dated as Thanetian (SBZ 3? to SBZ 4) by the presence of Ranikothalia soldadensis. Though the age of the second association remains uncertain, a similar age has been inferred.

Carnets Geol., vol. 14, nº 4, p. 41-68

Online since March 17, 2014


Acanthocythereis colini nomen novum for A. reticulata Sciuto, 2014
Francesco SCIUTO

 | HTML  | PDF [27 KB]  | DOI : 10.4267/2042/53523

 Excerpt:  In Sciuto (2014), a new species, Acanthocythereis reticulata, was described from the Upper Pliocene sediments of NE Sicily and belonging to the Family Trachyleberididae Sylvester-Bradley, 1948.. (...)

Carnets Geol., vol. 14, nº 3, p. 39

Online since February 28, 2014


A Cretaceous chronostratigraphic database: construction and applications
Robert W. SCOTT

 | HTML  | PDF [1.718 KB]  | DOI : 10.4267/2042/53522

 Abstract:  Timing and rates of tectonic events, evolutionary processes, and oceanographic and paleoclimatic changes must be based on high-precision numerical age calibration of stages defined in Global Stratotype and Section Points (GSSPs). The Cretaceous Chronostratigraphic Database (CRETCSDB3) is an objective, testable database that calibrates select Cretaceous events and enables high-resolution chronostratigraphic correlations.
CRETCSDB3 is a compilation of more than 3500 taxa and marker beds in nearly 300 published sections calibrated to a mega-annum (Ma) scale. The database spans the Jurassic/Cretaceous and the Cretaceous/Paleogene boundaries. Construction of CRETCSDB3 began by plotting bioevents in the Kalaat Senan, Tunisia, Cenomanian-Turonian section to the 1989 time scale. The sedimentology, sequence stratigraphy, and biostratigraphy of this section were precisely documented and stage boundaries defined biostratigraphically. Additional sections with radiometrically dated beds were graphed to constrain the accuracy of the numerical scale. Ranges of first and last occurrences are calibrated to mega-annums of Cretaceous stages defined by GSSPs or reference sections. This database serves as a look-up table for interpolation and age calibration of other stratigraphic sections. The age ranges of some taxa and marker beds are preliminary and may be extended as new sections are added to the database.
CRETCSDB3 tested the numeric age calibration of the Albian/Cenomanian boundary. This boundary in North Texas accurately correlates with the GSSP in France by ammonites, planktic foraminifers and dinoflagellates. This stage boundary in North Texas correlates with the 97.88±0.69 Ma Clay Spur Bentonite in Wyoming by sequence stratigraphy and cosmopolitan dinoflagellates. The inconsistency between this age and the current 100.5 Ma date of the 2012 Geologic Time Scale remains to be evaluated independently.

Carnets Geol., vol. 14, nº 2, p. 15-37

Online since February 28, 2014


Ostracods of the Upper Pliocene - Pleistocene Punta Mazza succession (NE Sicily) with special focus on the Family Trachyleberididae Sylvester-Bradley, 1948, and description of a new species
Francesco SCIUTO

 | HTML  | PDF [1.980 KB]  | DOI : 10.4267/2042/53172

 Abstract:  The ostracod associations of the Upper Pliocene-Pleistocene sedimentary succession out-cropping at Punta Mazza (Milazzo, Sicily NE) have been investigated. The ostracod fauna is often well-preserved and well-diversified: there 42 species belonging to 24 genera have been found. The association consists almost exclusively of bathyal taxa such as Bythocypris obtusata (Sars), B. bosquetiana (Brady), Henryhowella ex H. profunda Bonaduce et al. group, Quasibuntonia radiatopora (Seguenza), Retibythere (Bathybythere) scaberrima Brady, Pseudocythere caudata Sars and Bythocythere mylaensis Sciuto. Also, the Krithe group is well-represented with Krithe compressa (Seguenza) and K. pernoides (Bornemann). Further taxa such as Cytheropteron testudo Sars are rare. Almost all species, especially those belonging to Trachyleberididae Sylvester-Bradley are described, illustrated and commented on, including a new species, Acanthocythereis reticulata n.sp., found in the lower part of the section in Upper Pliocene sediment, is proposed as new. Finally, a specimen belonging to the genus Quasibuntonia Ruggieri is currently given in open nomenclature.

Carnets Geol., vol. 14, nº 1, p. 1-13

Online since January 25, 2014


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2013 (vol. 13) 

Article 9 [2013]: Silurian cornulitids of Estonia (Baltica), by Olev VINN & Mark A. WILSON.-
Format [HTML] or [PDF 1,050 KB]
Reference: [CG2013_A09]
DOI: 10.4267/2042/53034
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CG2013_A09_thumb Abstract:  Seven species of cornulitids are systematically described from the Silurian of Saaremaa and Hiiumaa islands, Estonia. There are three species of cornulitids in the Rhuddanian, three in the Sheinwoodian, single species in the Gorstian and Ludfordian, and three species in the Pridoli. Cornulitids have a facies range from pelletal limestones of shoal environments to deeper ramp marls. Endobiotic cornulitid symbionts occur in stromatoporoids found in shoal and open shelf zones. Gregarious aggregates are restricted to the limestones of the open shelf zone possibly because of higher nutrient levels in open shelf zone waters as compared to those of the deeper ramp. Unattached free forms are especially common in offshore deeper ramp marls presumably due to their adaption to life on a soft bottom. Solitary attached forms occur in all facies zones where cornulitids are present. Because the life modes of cornulitids are closely associated with particular facies zones, they are useful tools for paleoecological reconstructions.

Online since December 25, 2013


Book 2 [2013]: Anisian Dasycladales from Upper Silesia and adjacent regions, by Zbigniew KOTAŃSKI.-
Format [HTML] or [PDF 41,302 KB]
Reference: [CG2013_B02]
DOI: 10.4267/2042/53036
Lang.: 

Dépôt légal: 
ISBN13
: 978-2-916733-12-8

 Abstract:  Anisian Dasycladales (calcareous algae) from the Diplopora Dolomite of the Upper Silesia and adjacent regions of S Poland are revised. All previously reported taxa are critically reviewed and illustrated. New paleontological samples were collected from 74 outcrops and from 45 boreholes. The abundant material includes both specimens visible on fractured rock surfaces and thin-sectioned ones; 24 species of Dasycladales are identified, including three new species: Oligoporella chrzanowensis n.sp., Physoporella polonoandalusica n.sp., and Salpingoporella krupkaensis n.sp. Best-preserved specimens are illustrated in 39 plates. The identified species were compared with Alpine and Carpathian forms of stratigraphic importance. Six Dasycladalean local horizons are defined. The Pelsonian-Illyrian boundary occurs in the middle part of the Diplopora Dolomite. Its uppermost part, despite the presence of Diplopora annulata, belongs to the Illyrian, not to the Fassanian, as also corroborated by conodont correlations. The peculiar state of preservation (internal moulds and double tubes) is discussed; it is due to early syngenetic dolomitisation. The palaeoenvironment of the algae is determined as sublittoral. Dasycladales flourished upon a peri-Tethyan carbonate platform, widely connected with the Alpine-Carpathian seas. Five palaeoecological assemblages are recognized, differing in their bathymetric and turbulence conditions, and living in marine shoals and shallow basins separating them. The Upper Silesian platform was separated from the hypersaline Germanic Basin of the Middle Muschelkalk by banks and oolite and bioclastic barriers, blocking dispersal of marine biota. A wide connection existed with the Alpine-Carpathian seas, allowing immigration of High-Tatric, Križna and even South Alpine flora to the Upper Silesian Carbonate Platform.

Online since December 25, 2013


Letter 7 [2013]: Dissocladella hauteriviana MASSE in MASSE et al., 1999 (non MASSE, 1976), another lower Urgonian Dasycladalean alga revisited, by Bruno GRANIER.-
Format [HTML] or [PDF 1,990 KB]
Reference: [CG2013_L07]
DOI: 10.4267/2042/53035
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CG2013_L07_thumb Abstract:   First ascribed to the Triploporellacean genus Dissocladella (Pia in Rao & Pia, 1936), the species D. hauteriviana Masse in Masse et al., 1999, was supposedly characterized by a thallus bearing whorls of laterals each consisting of a stumpy primary with a tuft of four slim secondaries at its top. A restudy of the laterals proves that they split, not only once, but several times, and stepwisely decrease in diameter. The species is re-ascribed to the Family Thyrsoporellaceae in a new combination to the genus Deloffrella Granier & Michaud, 1987. Its known stratigraphic range is rather short (Late Valanginian-earliest Barremian). In addition, it disappears earlier than its companion Polyphysacean alga, i.e., Clypeina paucicalcarea (Conrad, 1970), and its geographical distribution is broader, which makes it a good index fossil for lower Urgonian carbonate platform series.

Online since December 25, 2013


Obituary notice: Jean-Paul COLIN.-
Format [HTML] or [PDF 245 KB]
Reference: [Jean-Paul_Colin]
DOI: 10.4267/2042/51849
Lang.: 

Jean-Paul_ColinJean-Paul COLIN (1948 - 2013) passed away at the end of this summer and his departure is a cruel loss for our community, not only as a scientist of international repute, but also as an outstanding organizer and, for a number of us, as a good friend.
Following his PhD degree in micropaleontology from the University of Paris VI in 1973, he spent his entire career in the exploration branch of the oil industry, first with EXXON in Houston and Bègles from 1974 to 1989, and then with ESSO REP in Bègles from 1989 to 2000. (...)
Jean-Paul COLIN was a great field and laboratory naturalist and as a scientific partner was always open to often lively discussion. His enthusiasm for the ostracods was huge and it was a pleasure to discuss with him. (...)
Being a very friendly person, he helped ostracodologists worldwide who went to him with questions, particularly the young.
Besides these activities, Jean-Paul COLIN was member of the editorial board of several international journals. (...) He was Associate Editor of Carnets de Géologie [Notebooks on Geology].

Online since November 22, 2013

 Addendum:  In order to be complete the bibliographic list of Jean-Paul Colin should also have included the following missing reference (Fida Medina, personal communication): Medina F., Vachard D., Colin J.-P., Ouarhache D. & Ahmamou M'F. (2001).- Charophytes et ostracodes du niveau carbonate de Taourirt Imzilen (Membre d'Aglegal, Trias d'Argana) : implications stratigraphiques.- Bulletin de l'Institut scientifique, Rabat, (section Sciences de la Terre), n° 23, p. 21-26.

Format [HTML] or [PDF 17 KB]

Online since February 28, 2014


Letter 6 [2013]: About the generic attribution of Megatyloceras casei HUMPHREY, 1949 (Ammonoidea, Ancyloceratina), from the Aptian of Mexico, by Josep A. MORENO-BEDMAR & Gérard DELANOY.-
Format [HTML] or [PDF 2,824 KB]
Reference: [CG2013_L06]
DOI: 10.4267/2042/51826
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CG2013_L06_thumb Abstract:   In the present work we review the generic attribution of the Mexican ammonoid species Megatyloceras casei Humphrey, 1949, through a careful examination of the holotype housed in the University of Michigan and with reference to new biostratigraphic data from the type locality. We assign here this species to the subfamily Cheloniceratinae and to the genus Epicheloniceras Casey, 1954.

Online since November 11, 2013


Article 8 [2013]: Daniel ŒHLERT (1849-1920): scientific biography and bibliography, by Christian C. EMIG.-
Format [HTML] or [PDF 455 KB]
Reference: [CG2013_A08]
DOI: 10.4267/2042/51825
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CG2013_A08_thumb Abstract:  Daniel Œhlert (1849-1920): scientific biography and bibliography.- Daniel Œhlert (1849-1920) spent his entire career in Laval (Mayenne, France). His duties as a librarian of the city of Laval, then as curator of the museums of archaeology and natural history of Laval, allowed him freedom to focus on palaeontology and geology. He worked with his wife Pauline both in the field in the departments of Mayenne and Sarthe. In between field trips in the Mayenne and Sarthe, they shared the research during their long stays in Paris, working at the Sorbonne. Œhlert's studies focused mainly on faunas of the Palaeozoic seas of Maine, Anjou and Cotentin. Œhlert devoted himself primarily on describing crinoids, trilobites and brachiopods. In his collection, located in the "Musée des Sciences" (Laval, Mayenne, France), more than 20 new genera with more than 150 new invertebrate species have been described. His geological and stratigraphical work is largely original, involving almost exclusively Palaeozoic areas in the departments of Mayenne and Sarthe, and secondarily in the departments of Orne and Ille-et-Vilaine. In 1884, he took a position at the "Service de la Carte géologique de France". More than a hundred publications spread out from 1877 ended abruptly in 1911 with the death of his wife Pauline. A list of all his works is provided.

Online since November 11, 2013


Article 7 [2013]: Revision of the Jesse Harlan JOHNSON Collection. Part 1. Some fossil Dasycladales from Guatemala, by Bruno GRANIER, Rajka RADOIČIĆ & Katica DROBNE.-
Format [HTML] or [PDF 7,459 KB]
Reference: [CG2013_A07]
DOI: 10.4267/2042/51824
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CG2013_A07_thumb Abstract:  This first report is a revision of fossil calcareous green algae (Dasycladales) described from the Upper Cretaceous and Paleocene series of Guatemala. Among other things in their 1965 paper J.H. Johnson and H.V. Kaska introduced three new species originally referred to the genera Acroporella, Cylindroporella, and Cymopolia. One species, which has previously been referred to the genus Cylindroporella, is a foraminifer.

 Supplementary material:  Color plates [PDF 1,368 KB]

Online since November 11, 2013


Letter 5 [2013]: Paleotropical pollen grains from the Neuquén Group, Patagonia, Argentina, by Patricia VALLATI.-
Format [HTML] or [PDF 297 KB]
Reference: [CG2013_L05]
DOI: 10.4267/2042/51218
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CG2013_L05_thumb Abstract:  This paper discusses the presence of elater-bearing pollen grains and other characteristic paleotropical palynomorphs in the mid to Late Cretaceous Neuquén Group at the El Zampal locality, south of Mendoza Province, Argentina.
The elaterates characterize the equatorial paleofloristic province in the Albian-Cenomanian. The species Elateroplicites africaensis is present in the pollen assemblage recovered from the lower section of the Huincul Formation, a basal  unit of the studied Neuquén Group. It represents the first record of elater-bearing pollen grains in Argentina and marks their southernmost extension. Other conspicuous paleotropical elements recorded in different lithostratigraphic units of the Neuquén Group include gymnospermous polyplicate pollen grains and angiosperm pollen, including two species of the periporate pollen genus Cretacaeiporites and the triporate pollen species Confossia vulgaris. The paleobiogeographic and biostratigraphic significance of the paleotropical sporomorph record in the Cretaceous palynofloras of the Neuquén Group at El Zampal is herein discussed.

Online since August 2, 2013


Letter 4 [2013]: Praeorbitolina claveli n.sp. (benthic Foraminifera) from the Lower Aptian sensu lato (Bedoulian) of Central Iran, by Felix SCHLAGINTWEIT, Ioan I. BUCUR, Koorosh RASHIDI & Behnam SABERZADEH.-
Format [HTML] or [PDF 1,755 KB]
Reference: [CG2013_L04]
DOI: 10.4267/2042/51217
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CG2013_L04_thumb Abstract:  The new orbitolinid foraminifer, Praeorbitolina claveli n.sp., is described from the Lower Aptian (Bedoulian) of Central Iran. It is characterized by an eccentric embryonic apparatus displaying both a subdivided subembryonic zone and a deuteroconch. The Barremian-Aptian orbitolinid association of this area has a typical northern Tethyan character (e.g., "association à Valserina" of Cherchi and Schroeder, 1973).

Online since August 2, 2013


Article 6 [2013]: New data on the Valanginian - Hauterivian Ammonites from the stratotypical area of Neuchâtel (Swiss Jura Mountains) : biostratigraphic implications, by Pierre-Olivier MOJON, Antonio MUSOLINO, Stefan BUCHER & Bernard CLAUDE.-
Format [HTML] or [PDF 1,254 KB]
Reference: [CG2013_A06]
DOI: 10.4267/2042/51216
Lang.: 

CG2013_A06_thumb Abstract:  New collections of Upper Valanginian - Lower Hauterivian ammonites yield precisions about the biostratigraphical scheme of the Lower Cretaceous in the stratotypical area of Neuchâtel (Swiss Jura Mountains). Thus, Stoicoceras pitrei (Busnardo, 1966) from the "Calcaire roux limoniteux" is reported in the upper Saynoceras verrucosum Biozone (Karakaschiceras pronecostatum Subzone) of the Upper Valanginian. In the Lower Hauterivian, Olcostephanus (O.) variegatus Paquier, 1900, from the upper part of the "Marnes bleues d'Hauterive" and Saynella cf. clypeiformis (d'Orbigny, 1841) from the "Marnes d'Uttins" (top of the lower part of the "Pierre jaune de Neuchâtel") extend greatly the range of the Lyticoceras nodosoplicatum Biozone compared to a more reduced Crioceratites loryi Biozone indicated by Saynella neocomiensis (Baumberger, 1905) and a unique specimen of Crioceratites cf. gr. loryi (Sarkar, 1955) found in 1907.

Online since August 2, 2013


Article 5 [2013]: Study of the species Ochetoceras (Ochetoceras) canaliculatum (de Buch, 1831) (Middle Oxfordian, Transversarium Zone), by Philippe QUEREILHAC.-
Format [HTML] or [PDF 4,465 KB]
Reference: [CG2013_A05]
DOI: 10.4267/2042/51215
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CG2013_A05_thumb Abstract:   The species Ochetoceras (Ochetoceras) canaliculatum (de Buch, 1830 [1831]), discussed here, is certainly the most representative of the Transversarium Zone (Middle Oxfordian) in the Tethyian domain (Mediterranean Province). It appears in the Parandieri Subzone and seems to go extinct in the Stenocycloides Subzone (Late Oxfordian, base of the Bifurcatus Zone). It is abundantly represented in the ammonite populations and has a wide geographical range and has a wide geographical spread. Analysis shows that it is always associated with species referred to Ochetoceras (Ochetoceras) hispidum [M] (Oppel, 1863) and Glochiceras (Glochiceras) subclausum [m] (Oppel, 1863) ; many authors have long thought that it was a single species. These three "species" are thus here united under the name Ochetoceras (Ochetoceras) canaliculatum (de Buch, 1831): macroconchs corresponding to the "morphs" canaliculatum and hispidum are polymorphic evolving from a narrow to a wide whorl cross section whereas the "morph" subclausum is a sexual dimorphic microconch.

Online since August 2, 2013

 Erratum:  On page 219, one should read:
"À la lecture d'anciennes publications, il est apparu que le nom d'auteur (de Buch) avait été mal transcrit. L'Ammonites canaliculatus Graf von Münster, de Buch, 1831, l'Ammonites hispidus Oppel, 1863, et l'Ammonites subclausus Oppel, 1863, sont maintenant réunies sous l'appellation Ochetoceras (Ochetoceras) canaliculatum (de Buch, 1831)",
instead of:
"À la lecture d'anciennes publications, il est apparu que le nom d'auteur (de Buch) avait été mal transcrit et que la date de création de l'espèce (1831) était erronée : ces faits ont été mis en évidence à l'aide de l'I.C.Z.N. (4ème édition, 1999), inconnu à l'époque. L'application des articles de ce dernier a permis de corriger ces erreurs. L'Ammonites canaliculatus Graf von Münster -- figurée dans la publication de von Zieten datée de 1832 --, l'Ammonites hispidus Oppel, 1863 et l'Ammonites subclausus Oppel, 1863 -- toutes deux figurées et décrites par cet auteur --, sont maintenant réunies sous l'appellation Ochetoceras (Ochetoceras) canaliculatum (de Buch, 1831)".

Format [HTML] or [PDF 30 KB]

Online since August 4, 2013


Article 4 [2013]: L'Estellon (Baronnies, France), a "Rosetta Stone" for the Urgonian biostratigraphy, by Bruno GRANIER, Bernard CLAVEL, Michel MOULLADE, Robert BUSNARDO, Jean CHAROLLAIS, Guy TRONCHETTI & Pierre DESJACQUES.-
Format [HTML] or [PDF 8,169 KB]
Reference: [CG2013_A04]
DOI: 10.4267/2042/51213
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CG2013_A04_thumb Abstract:  Shallow-water assemblages of transported (freshly reworked) bioclasts (mainly orbitolinids and dasycladales) are observed in the deeper facies of the "Vocontian Trough" (SE France). There these benthic assemblages can be directly correlated with ammonite zones. These new finds give an Early Barremian age to the earliest record of Palorbitolina lenticularis as well as those of four so-called typical Early Aptian representatives of the genus Orbitolinopsis. Actually most orbitolinid species recorded from the Late Barremian interval are now found present in Lower Barremian strata at L'Estellon. Some currently used correlation schemes for the Urgonian platforms, that are based on partial stratigraphic distribution ranges for the orbitolinids, --and consequently derived conclusions and hypotheses-- require at least in-depth revisions when they are not definitively refuted.

Online since July 22, 2013

 Erratum:   On page 175, first column (bottom), one should read: "2) Genus Dictyoconus Blanckenhorn, 1900", instead of: "2) Genus Dictyorbitolina Blanckenhorn, 1900".

On page 175, second column (top), one should read: "Provisionally attributed to the genus Dictyoconus", instead of: " Provisionally attributed to the genus Dictyorbitolina".

On page 179, second column, one should read: "nor between Dictyoconus ? vercorii and Dictyoconus aff. vercorii", instead of: "nor between Dictyorbitolina ? vercorii and Dictyorbitolina aff. Vercorii".

Similarly, on Plate 8, figs. 10-12, Plate 9, fig. 7, and Plate 10, fig. 4, one should read "Dictyoconus ? vercorii" instead of "Dictyorbitolina ? vercorii".

Format [HTML] or [PDF 27 KB]

Online since December 25, 2013


Article 3 [2013]: Barremian ammonite fauna from L'Estellon section (Baronnies, SE France): preliminary biostratigraphic results, by Robert BUSNARDO, Bruno GRANIER, Bernard CLAVEL & Jean CHAROLLAIS.-
Format [HTML] or [PDF 4,565 KB]
Reference: [CG2013_A03]
DOI: 10.4267/2042/51212
Lang.: 

CG2013_A03_thumb Abstract:   The study of the ammonite fauna in the L'Estellon section (Drôme department, SE France) allows us to date episodes with gravitational deposition in this area of the "Vocontian Trough". They span most of the Barremian Stage, from the Nicklesi Zone up to the Giraudi Zone. We did not identify any Bedoulian redeposits, the "Bedoulian ridge" auct. being latest Barremian in age.

Online since July 22, 2013


Letter 3 [2013]: Cornulitid tubeworms from the Ordovician of eastern Baltic, by Olev VINN.-
Format [HTML] or [PDF 635 KB]
Reference: [CG2013_L03]
DOI: 10.4267/2042/51214
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CG2013_L03_thumb Abstract:  Nine species of cornulitids are systematically described here from the Ordovician of Estonia. The earliest species, Cornulites semiapertus, appears in the late Darriwilian (Middle Ordovician), the next two species appear in the Sandbian and there are a further six new species in the Katian, which indicates a rapid diversification of cornulitids in the Late Ordovician of Baltica. All the studied cornulitids from the Ordovician of Estonia occur in relatively shallow-water normal-marine sediments of a carbonate platform. The cornulitids are found encrusting mostly brachiopod shells (both syn vivo and post mortem).

Online since July 22, 2013


Memoir 2 [2013]: Priabonian mammals and reptiles from the Platé Massif (Savoy, France), by Michel DELAMETTE & Jean A. REMY.-
Format [HTML] or [PDF 5,875 KB]
Reference: [CG2013_M02]
DOI: 10.4267/2042/50056
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CG2013_M02_thumb Abstract:  A lens of marly limestone at the bottom of the Tertiary series of the Grandes Platières (Platé Massif, Savoy) has yielded the most important collection of fossil vertebrates so far known from the Paleogene of Western Alps. Ungulate mammals are represented by 35 teeth to be referred to 9 taxa (4 perissodactyls and 5 artiodactyls). This new fauna appears contemporaneous with that of La Débruge (MP 18 level), dated at about 35.5 My old. The new locality, called "gisement des Perdrix", is stratigraphically located 20-35 m underneath the other one in which Weidmann et al. (1991) had found mammals to be attributed to the MP 20 level. So the new fauna is about 1.5 My older than this latter. Its faunal composition and the swampy nature of the deposit suggest that the occurring mammals were living in variegated surroundings, with woody areas close to wet marshy ones.

Online since May 17, 2013


Article 2 [2013]: Xerticeras gen. nov., a new genus of micromorphic heteromorph ammonite (Ancyloceratina, Ancyloceratidae) from the lower Aptian of Spain, by Gérard DELANOY, Josep A. MORENO-BEDMAR, José J. RUIZ & Domingo TOLÓS LLÁDSER.-
Format [HTML] or [PDF 4,285 KB]
Reference: [CG2013_A02]
DOI: 10.4267/2042/49315
Lang.: 

CG2013_A02_thumb Abstract:  Biostratigraphical and paleontological studies of lower Aptian material from the Eastern Iberian Chain (Spain) have revealed the presence of a new genus of micromorphic heteromorph ammonite: Xerticeras gen. nov. (type species: Xerticeras salasi sp. nov.). This new taxon comes from the Deshayesites deshayesi and Dufrenoya furcata ammonite zones. The size difference observed in the population is considered due to sexual dimorphism.

Online since April 24, 2013


Letter 2 [2013]: An event bed with abundant Skolithos burrows from the late Pridoli (Silurian) of Saaremaa (Estonia), by Olev VINN & Mark A. WILSON.-
Format [HTML] or [PDF 1,833 KB]
Reference: [CG2013_L02]
DOI: 10.4267/2042/49316
Lang.: 

CG2013_L02_thumb Abstract:  Abundant Skolithos burrows are here described from a possible regressive event bed at Ohesaare cliff (Pridoli), Saaremaa, Estonia. The vertical, cylindrical burrows are identified as Skolithos rather than Trypanites because they intercept and bypass rather than cut bioclasts in the limestone matrix. The absence of encrustation on the upper bedding surface also is evidence that these traces are soft-sediment burrows rather than hardground borings. We interpret this intensive bioturbation by Skolithos-producing organisms as an indicator of a shallow water paleoenvironment with high hydrodynamic energy.

Online since April 24, 2013


Article 1 [2013]: New paleontological and stratigraphical data at the Aptian - Albian transition in the Ariege Pyrenees (France), by Jacques REY, Josep Anton MORENO-BEDMAR, Michel BILOTTE & Ricardo MARTÍNEZ.-
Format [HTML] or [PDF 1,910 KB]
Reference: [CG2013_A01]
DOI: 10.4267/2042/48733
Lang.:  

CG2013_A01_thumb Abstract:  The discovery of ammonites of the Aptian - Albian transition (Hypacanthoplites jacobi and Leymeriella tardefurcata biozones) in the Urgonian series from the sedimentary section exposed in the Arize massif invalidates their former attribution to the lower Clansayesian which was proposed on the basis of unconstrained paleontological arguments.

Online since February 28, 2013


Letter 1 [2013]: Heteroporella ? paucicalcarea (Conrad, 1970), an Urgonian Dasycladalean alga revisited, by Bruno GRANIER.-
Format [HTML] or [PDF 1,412 KB]
Reference: [CG2013_L01]
DOI: 10.4267/2042/48737
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CG2013_L01_thumb Abstract:  When the species Heteroporella ? paucicalcarea (Conrad, 1970) was erected it was left in open nomenclature. Later on new combinations were introduced but did not meet a general agreement among paleophycologists. Considering the current acception of the Dasycladalean families, we ascribe it to the Family Polyphysaceae and subsequently to the genus Clypeina (Michelin, 1845). Its known stratigraphic range is rather brief (Late Hauterivian-Early Barremian), which makes it a good index fossil in Urgonian carbonate platform series. Its geographical distribution is apparently restricted to Western Europe (France, Spain and Switzerland).

Online since February 28, 2013


Book 1 [2013]: The XXIst Century (the 100th Anniversary) Edition of the "New studies on Triassic Siphoneae verticillatae" by Julius von PIA, by Bruno GRANIER & Nestor J. SANDER.-
Format [HTML] or [PDF 13,900 KB]
Reference: [CG2013_B01]
DOI: 10.4267/2042/48735
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Dépôt légal: 
ISBN13: 978-2-916733-11-1

couverture-pia Forewords:  This 21st century edition of Julius von Pia's 1912 memoir entitled "Neue Studien über die triadischen Siphoneae verticillatae" is brought to you by B. Granier (editing, photomicrographs) and N.J. Sander (translation). The artwork is due to A. Lethiers and B. Granier. The original 24 text-figures and 7 plates [II-VIII] were converted into 125 discrete photomigraphs, 5 figures and 56 videos. This research received support from the SYNTHESYS Project, which is financed by European Community Research Infrastructure Action under the FP6 "Structuring the European Research Area" Programme.


Click on image to play the video file

Reconstruction of Physoporella dissita.

Online since February 28, 2013


Memoir 1 [2013]: Revision of the species Hemidiadema rugosum Agassiz, 1846, and H. neocomiense (Cotteau, 1869) (Euechinoidea, Camarodonta, Glyphocyphidae) from the Lower Cretaceous of the Basin of Paris (France), by Arnaud CLÉMENT.-
Format [HTML] or [PDF 2,725 KB]
Reference: [CG2013_M01]
DOI: 10.4267/2042/48481
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CG2013_M01_thumb Abstract:  Hemidiadema rugosum Agassiz, 1846, and H. neocomiense (Cotteau, 1869) are small and poorly known "regular" echinoid species. They were the source of much confusion due to their rarity and the inadequacy of their original descriptions. Both species are revised here to clarify their differences and taxonomic status. This revision is based on six specimens of H. rugosum (including the holotype, not shown by its original author), all from the locus typicus and stratum typicum (Clansayesian [Upper Aptian sensu gallico] "Grès ferrugineux" from Grandpré, Ardennes) and on a single specimen of H. neocomiense from the stratum typicum (Lower Hauterivian (? Lyticoceras nodosoplicatum Zone) "Calcaire à Spatangues" from Ville-sur-Saulx (Meuse), a locality near to the locus typicus (Auxerre, Yonne)). For this latter species, a neotype is designated to replace the holotype that is lost. Remarks on the paleoecology and stratigraphic and geographic distributions of these two species are given. The revision of these two species provides an opportunity to propose an emended diagnosis of the genus Hemidiadema Agassiz, 1846, a poorly known member of the Glyphocyphidae.

Online since January 21, 2013


up2  

Novel

Les chiens aboient..., a novel by Herbert WILD [available in a French version only!].-
Format [HTML]
Reference : [CG2009_ROMAN]
Lang.: 

Dépôt légal: 
ISBN13: 978-2-916733-05-0

CG2009_ROMAN_thumb Contents : 

  • Préface (Michel DURAND DELGA)
  • Première partie : La joie de créer
  • Deuxième partie : La poursuite sauvage
  • Troisième partie : ... la caravane passe
  • Commentaires (Michel DURAND DELGA)

Electronic edition by Jean-Marie OLLIVIER & Bruno GRANIER (photo © R. OLLIVIER)

It is a novel by Herbert Wild, the pen name of Jacques Deprat, titled "Les chiens aboient... [The dogs bark...]" [Note: it is available in a French version only!]. Michel Durand Delga has added explanatory notes about Deprat's situation (fall from grace).  Edited by Jean M. Ollivier and Bruno Granier, the HTML electronic version is available free of charge.

The paper-printed version, a pocket book (378 p.), is available since September 14th 2009 for 10 € only (shipping included) with the PayPal button below.

Alternatively you can send a check of the same amount (drawn in € from a French bank) and your information (including the delivery address) to Jean M. Ollivier, Quartier Lassabaigt, F-64150 Lahourcade (France).

Online since May 18, 2009






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