Romanian Symposium on Paleontology the Sixth

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Romanian Symposium on Paleontology the Sixth ROMANIAN SOCIETY OF PALEONTOLOGISTS UNIVERSITY „AL. I. CUZA” OF IAùI DEPARTMENT OF GEOLOGY - PALEONTOLOGY ROMANIAN SYMPOSIUM ON PALEONTOLOGY THE SIXTH EDITION 21 – 23 September 2007 Iaúi, Romania VOLUME OF ABSTRACTS (In the first author’s alphabetical order) Edited by: Paul ğIBULEAC, Daniel ğABĂRĂ & Leonard OLARU Iaúi 2007 ORGANIZING COMMITTEE Honorary President: Prof. Ph. D., Liviu Ionesi University „Al. I. Cuza” of Iaúi, Member of Romanian Academy; Prof. Ph. D. Theodor Neagu, University of Bucharest, Member of Romanian Academy. Executive president: Prof. Ph. D. Leonard Olaru, University „Al. I. Cuza” of Iaúi. Vicepresidents: Prof. Ph. D. em. Bica Ionesi, University „Al. I. Cuza” of Iaúi; Prof. Ph. D. Mihai Brânzilă, University „Al. I. Cuza” of Iaúi; Prof. Ph. D. Dan Grigorescu, University of Bucharest; Prof. Ph. D. Ioan Bucur, University „Babeú- Bolyai” of Cluj Napoca; CS I Ph. D. Titus Brustur, National Institute of Marine Geology and Geo-ecology, Bucureúti. Members: Prof. Ph. D. Ilie TurculeĠ, University „Al. I. Cuza” of Iaúi; Prof. Ph. D. Constantin Grasu, University „Al. I. Cuza” of Iaúi; Associate Prof. Ph. D. Petru ùtefan, University „Al. I. Cuza” of Iaúi; Associate Prof. Ph. D. Corneliu Horaicu, University „Al. I. Cuza” of Iaúi; Prof. Ph. D. Eugen Grădinaru, University of Bucharest; Prof. Ph. D. Ovidiu Dragastan, University of Bucharest; Prof. Ph. D. Nicolae ğicleanu, University of Bucharest; Prof. Ph. D. Iustinian Petrescu, University „Babeú-Bolyai” of Cluj Napoca; Prof. Ph. D. Sorin Filipescu, University „Babeú-Bolyai” of Cluj Napoca; Prof. Ph. D. Vlad Codrea, University „Babeú-Bolyai” of Cluj Napoca; Associate Prof. Ph. D. Carmen Chira, University „Babeú-Bolyai” of Cluj Napoca; Prof. Ph. D. Alexandru Lungu, Tiraspol University of Chiúinău; Ph. D. Gheorghe Popescu; Ph. D. Stănilă Iamandei; General secretary: Lecturer Ph. D. Paul ğibuleac, University „Al. I. Cuza” of Iaúi. Secretariat: Teaching Assistant Ph. D. ğabără Daniel, University „Al. I. Cuza” of Iaúi; Lecturer Ph. D. Viorel Ionesi, University „Al. I. Cuza” of Iaúi; Lecturer Ph. D. Iuliana Lazăr, University of Bucharest; Lecturer Ph. D. Csiki Zoltan, University of Bucharest; Lecturer Ph. D. Mihai Popa, University of Bucharest; Lecturer Ph. D. Mirela Popa, University „Babeú-Bolyai” of Cluj Napoca; Lecturer Ph. D. Ioan TanĠău, University „Babeú-Bolyai” of Cluj Napoca; Lecturer Ph. D. Nicoleta Briúan, University „Babeú-Bolyai” of Cluj Napoca; Romanian Symposium on Paleontology – Iaúi, VI-th edition PEùTI FOSILI OLIGOCENI DIN OLISTOLITUL DE MARNE BITUMINOASE DE PE MUNTELE PIETRICICA, PIATRA NEAMğ, SEMIFEREASTRA BISTRIğA-RÂùCA, PÂNZA DE VRANCEA Dorin-Sorin BACIU1, IonuĠ GRĂDIANU2, Mihai NICULIğĂ3 1 Catedra de Geologie- Paleontologie, Univ. "Al.I.Cuza" Iaúi 2 Muzeul de ùtiinĠe ale Naturii Piatra NeamĠ 3 masterand, Facultatea de Geografie-Geologie, Univ. "Al.I.Cuza" Iaúi Masivele Cozla, Pietricica úi Cernegura din jurul oraúului Piatra NeamĠ sunt integrate geologic în Pânza de Vrancea, semifereastra BistriĠa-Râúca. FormaĠiunile cretacic-miocene din zonă sunt cuprinse într-o serie de structuri dominate de anticlinalul major Doamna- HoraiĠa (Băncilă,1958), cută cu caracter deversat. Structurile care antrenează depozitele eocene úi oligocene din perimetrul studiat sunt strâns legate de evoluĠia acestei cute anticlinale majore cu deversare estică evidentă. Pe muntele Pietricica a fost identificat al II lea nivel de marne bituminoase, caracterul olistolitic fiind demonstrat de Ionesi úi Grasu (1993). Acesta este situat pe versantul sudic, la altitudinea de 510 m, având o grosime de aproximativ 10 m úi o lungime de 110 m. Leon C. Cosmovici colectează primii peúti fosili din Muntele Cozla, Piatra NeamĠ, pe care îi descrie în prima lucrare cu caracter paleoihtiologic din Romania în anul 1887. Cea mai mare parte din fauna fosilă oligocenă de la Piatra NeamĠ a fost descoperită din formaĠiunea disodilelor inferioare (Ciobanu, 1977). Din olistolitul de pe muntele Pietricica, în urma săpăturilor efectuate în ultimii 2 ani, au fost descoperite mai multe exemplare bine conservate aparĠinînd familiilor Myctophidae, Gadidae úi Scophthalmidae. Mictophidele au organe luminescente, fotofori, situate pe partea abdominală; în fauna actuală sunt reprezentate prin aproximativ 250 de specii distribuite în toate mările úi ocenele lumii; sunt peúti mezopelagigi cu migraĠie pe verticală, ajungînd în timpul nopĠii până la adîncimi de 200m. Familia Gadidae, cu cele aproximativ 25 de specii actuale (sau codul adevărat), este distribuită din apele temperate până în cele reci ale Atlanticului de Nord úi Pacificul de Nord. Acestea preferă zonele de pe sau imediat deasupra fundului marin din zonele de úelf, în căutare de hrană úi loc de depunere al icrelor. Scophthalmidele sunt peúti plaĠi, reprezentaĠi în fauna actuală prin 12 specii distribuite în Atlanticul de Nord, Mediterana úi Marea Neagră; preferă zonele cu fund nisipos sau argilos de pe úelf, până la adîncimi de 110m. Exemplarele fosile descoperite sunt majoritatea nedeformate úi complete, fapt ce demonstreză lipsa transportului pe distanĠe mai lungi. Interpolarea caracterelor ecologice se poate face până la nivel de familie (Gaudan, 1979), astfel prezenĠa gadidelor úi a scophthalmidelor ne demonstrază că, la nivelul formaĠiunii marnelor bituminoase, avem de-a face cu adâncimi mici, posibil 100-300 m úi o salinitate normală. september 2007 21 – 23 - 1 - Romanian Symposium on Paleontology – Iaúi, VI-th edition THE FORAMINIFERA ASSOCIATED TO THE HIDA FORMATION DEPOSITIONAL ENVIRONMENT Claudia BEDELEAN1, Sorin FILIPESCU1 1 Babeú-Bolyai” University, Department of Geology, Kogalniceanu 1 Str., 400084, Cluj-Napoca The Hida Formation, situated in north-western part of the Transylvanian Basin preserves in its lower part at least two distinct types of foraminifera assemblages: an assemblage of Eggenburgian type with taxa similar to Chechiú Formation (leading by Lagenida, calcareous benthic and planktonic calcareous foraminifera) and a deep-marine assemblage, typical for turbiditic environments (dominated by benthic agglutinated and planktonic taxa), which was identified in the deeper environments south of the Pienides. Towards the upper part of Hida Formation, the abundance and diversity of microfauna gradually decreases due to the change of environmental parametres. The correlation between the types of lithofacies and main micropaleontlogical assemblages allow a better paleoenvironmental zonation (deep-marine to deltaic environments). INFLUENğE ALE SUBSTRATULUI GEOLOGIC ÎN LUCRĂRI DE ARTĂ RÂPA GALBENĂ – IAùI Mihai BRÂNZILĂ1, Petru ùTEFAN1, Dumitru BULGARIU1 1 Universitatea „Al.I.Cuza”,Departamentul de Geologie,B-dul Carol I, 20, 700505 Iaúi Contextul geologic specific părĠii estice a Platformei Moldoveneúti, în care se regăseúte úi municipiul Iaúi, este dat de prezenĠa unei succesiuni de silturi argiloase, silturi nisipo- argiloase úi argile siltice, cunoscută în literatura de specialitate sub denumirea de „argile cu Cryptomactra”. Această entitate litostratigrafică s-a acumulat în condiĠii specifice începând cu Basarabianul inferior úi până în prima partea Basarabianului superior. Pentru că, Basarabianul superior corespunde, pe Platforma Moldovenească, cu încheierea evoluĠiei bazinelor de foreland controlate de subsidenĠa polarizată vest – est. FuncĠionarea bazinului (depozona backbulge) a impus úi evoluĠia unei asociaĠii faunistice particulare atât la nivel macro úi micropaleontologic, cu taxoni precum Cyptomactra pesanseris, Obsoletiforma barboti, O. michailowi, O. obsoleta, Plicatiforma fittoni, Quinqueloculina voloshinovae, Elphidium macellum, Porosononion subgranosuus, Nonion bogdanowiczi etc. Caracteristicile geochimice ale bazinului de sedimentare se regăsesc reflectate de actualul spectru chimic al argilelor cu Cryptomactra, dominat de prezenĠa silicei úi aluminei, spectru care intră, într-o anumită măsură, în interrelaĠie cu alte roci care vin în contact (gresii, calcare) utilizate în unele lucrări de artă, aúa cum este cazul la Râpa Galbenă – Iaúi. september 2007 21 – 23 - 2 - Romanian Symposium on Paleontology – Iaúi, VI-th edition A POSSIBLE HORNY SPONGE (DEMOSPONGIA, KERATOSIDA) FROM THE EASTERN CARPATHIAN OUTER FLYSCH (ROMANIA) Titus BRUSTUR1, Paul ğIBULEAC2, Constantin COSTEA3 1National Institute of Marine Geology and Geo-ecology, 23-25 Dimitrie Onciul St, RO- 024053, Bucharest, 2Alexandru Ioan Cuza University, Faculty of Geography and Geology, Chair of Geology-Paleontology, Avenus Copou 22A, 700505 Iaúi 3 Geological Institute of Romania, 1 Caransebeú Street, RO-012271 Bucharest A fossil body was discovered in the Kliwa Sandstone Formation from the Marginal Fold Nappe (= the Vrancea Nappe), in the Tazlău area. The morphology of this fossil and the cuticle ultrastructure suggest that it belongs to the horny sponges group (Keratosida), leuconoid type, with a largely open osculum. The presence of the horny sponge in the Kliwa Sandstone Formation (Oligocene) indicates an open marine environment, with a moderate depth and a compact sandy substratum, probably situated below the limit of the storm waves. MICROFAUNA DEPOZITELOR CAMPANIAN-MASTRICHTIAN INFERIOARE DIN SUDUL CARPAğILOR ORIENTALI (V. DÂMBOVIğEI) Claudia G. CETEAN1, Ramona BĂLC1, Michael A. KAMINSKI2, Sorin FILIPESCU1 1 Universitatea Babeú-Bolyai, Departamentul Geologie, M. Kogălniceanu 1, 400084, Cluj Napoca, Romania 2 Department of Earth Sciences, University College London, Gower Street, London WC1E 6BT, U.K. Studiul de faĠă are ca principal scop analizarea, din punct de
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