Marc André Conrad

ORCID: 0000-0001-8866-0721
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About
Contact & Profiles
Research Areas
  • Paleontology and Stratigraphy of Fossils
  • Geology and Paleoclimatology Research
  • Geological formations and processes
  • Marine Biology and Ecology Research
  • Diatoms and Algae Research
  • Geological and Geochemical Analysis
  • Geological and Geophysical Studies
  • Paleontology and Evolutionary Biology
  • Hydrocarbon exploration and reservoir analysis
  • Marine and coastal plant biology
  • Plant Diversity and Evolution
  • Geological Formations and Processes Exploration
  • Pleistocene-Era Hominins and Archaeology
  • Evolution and Paleontology Studies
  • Mediterranean and Iberian flora and fauna
  • Geological Studies and Exploration
  • Artificial Intelligence and Decision Support Systems
  • Geochemistry and Geologic Mapping

Planta
2021

HES-SO Genève
2012

Palaeontological, environmental and sequence stratigraphic studies were carried out on the shallow carbonate platform facies of Berriasian – Hauterivian, Fahliyan Formation lower part Gadvan Formation, at Kuh-e-Surmeh. The based calcareous green algae (mainly Dasycladales) accompanying benthic foraminifera, focusing revision considerable, pioneering work GOLLESTANEH (1965, 1979), initially undertaken behalf National Iranian Oil Company (NIOC). Thirty two species thirty four foraminifera...

10.4154/gc.2008.18 article EN cc-by Geologia Croatica 2008-12-25

Une r�partition biostratigraphique des orbitolinid�s cal�e sur la biozonation � ammonites a �t� �tablie pour l'Hauterivien sup�rieur et le Barr�mien inf�rieur pro parte du SE e France. Elle est bas�e l'�tude de huit coupes terrain relev�es dans France, qui ont livr� orbitolinid�s, encadr�s ou surmont�s par faci�s associ�es parfois �chinides dasycladales significatifs plan biostratigraphique. Il �tabli cette occasion que trois esp�ces...

10.4267/2042/33369 article FR Carnets de géologie (Notebooks on geology) 2010-01-01

Abundant, diversified algal assemblages comprising more than 25 species of Dasycladales are described from Barremian-Aptian limestone deposits the Tirgan Formation in NE Iran. New described: one them possibly belongs to a new endosporate genus, tentatively assigned Triploporellaceae; two others, Clypeina ? sp. 1 and Rajkaella 1, left open nomenclature. The widely distributed, locally abundant Montiella elitzae is revisited, because presence complete, exceptionally well preserved specimen....

10.4267/2042/33368 article EN cc-by-nc-sa Carnets de géologie (Notebooks on geology) 2010-01-01

Calcareous algae are frequent constituents in the shallow-marine limestone intercalations of late Aptian–Maastrichtian strata Eastern Desert Egypt, Sinai, and southern Jordan. A total 18 species green (among them 16 dasycladaceans with Praturlonella hammudai n. comb. jordanica sp., two udoteaceans) eight red gymnocodiaceans, three solenoporaceans, one squamariacean) described compared from several Tethyan occurrences. The stratigraphic distribution is calibrated by 10 assemblage-zones based...

10.1017/s0022336000037847 article EN Journal of Paleontology 1991-09-01

Sediment binding crusts of Lithocodium aggregatum and associated Bacinella irregularis abound in a shallow water limestone layer, South-East France. The sudden appearance these denotes local, conspicuous change the otherwise balanced, open marine depositional environment. Based on regional correlations, layer is Lower Hauterivian, Ligatus Zone, directly dated by an assemblage orbitolinids, indirectly specimen ammonite. It older than Faraoni OAE (latest Angulicostata auct. Zone), presumably...

10.4154/gc.2008.19 article EN cc-by Geologia Croatica 2008-12-25

Salpingoporella urladanasi, n. sp., is somewhat similar to the well known S. dinarica, from which it can be differen-ciated by its proportions. It was found in Spain and Yugoslavia, within upper Barremian — Albian interval. urladanasi apparently lived restricted marine, possibly brackish, environments. commonly together with Bacinella ? sterni and/or Charophytes.

10.3406/geolm.1977.995 article EN Géologie Méditerranéenne 1977-01-01

Abstract The genus Falsolikanella , introduced by Granier (1987), was based on the basal Cretaceous species Likanella campanensis Azéma and Jaffrezo (1972) assigned to tribe Diploporeae (Pia, 1920) emend. Güvenc, 1979 within green alga order Dasycladales. Later, other were . Sections of type specimens are reviewed. They show that in this species, arrangement laterals is not metaspondyl, but typical Actinoporella (Gümbel Alth, 1882) emend Conrad, Praturlon, Radoičić, 1974, with coronae...

10.1017/jpa.2018.108 article EN Journal of Paleontology 2019-02-28

Pseudoclypeina? crnogorica was first described in 1972 from the Lower, Cretaceous limestone of Njegos Mt. area, Montenegro, Dinaric Carbonate Platform. It differs other species genus Pseudoclypeina by its calcification pattern, shape and relative length second order laterals, presence type-material (a thin section containing holotype) sections standing for sterile portion thallus. This is why this paper, generic name left open nomenclature. On occasion species, whose also reported southern...

10.2298/gabp1374025r article EN cc-by Geoloski anali Balkanskog poluostrva 2013-01-01

In Western Kopet Dagh, the lower Cretaceous carbonate series contains distinctive assemblages of calcareous algae, chiefly Dasycladales which are primarily studied in this work. Based on significant presence certain species, Zard Formation, assigned to Valanginian and, its upper part, Hauterivian or base Barremian, is subdivided into two intervals, respectively A and B. Higher up, Urgonian-type Tirgan Barremian Lower Aptian, intervals C D. On occasion, taxonomy systematics 17 species one...

10.22059/geope.2019.275130.648447 article EN Geopersia 2019-09-12
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