- Bucharest, Bucuresti, Romania
Grigore Dan
Geological Institute of Romania, National Geological Museum Romania, Department Member
- Taxonomy, Romanian Studies, Mollusc Taxonomy, Invertebrate Palaeontology, Carpathians, Taxonomie, and 16 moreHoeck et al. (2009) Eastern Carpathians Triassic ophiolites, Evolution, Paleontology, Stratigraphy, Systematics (Taxonomy), Seismology, Biostratigraphy, Prediction of Earthquakes, Ammonites, Earthquake Geotechnical Engineering, Geoconservation, Seismic Hazard, Earthquake, Planetary Science, Earthquake Seismology, and Jurassic Stratigraphyedit
- Paleontologist at Geological Institute of Romania, National Museum of Geology in Bucharest from 1993. Anterior, geolo... morePaleontologist at Geological Institute of Romania, National Museum of Geology in Bucharest from 1993. Anterior, geologic engineer in field of oil, Petrom Company.Researches in Biostratigraphy, Paleontology (Jurassic ammonites), Paleogeography, Paleoecology, Geological Mapping and Seismology (as "hobby")edit
The paper presents description of the eleven species of the subgenus Taramelliceras (Taramelliceras) Del Campana 1904 found in the Formation of "Acanthicum Beds" (Kimmeridgian) from Ghilcoș (Hăghimaș Mountains, Romania). The species T.... more
The paper presents description of the eleven species of the subgenus Taramelliceras (Taramelliceras) Del Campana 1904 found in the Formation of "Acanthicum Beds" (Kimmeridgian) from Ghilcoș (Hăghimaș Mountains, Romania). The species T. trachinotum (Opp.), T. erycinum (Gemm.), T. mikoi (Herb.) and T. pugile (Neum.) have been previously described from this region by previous authors, the last two (T. mikoi and T. pugile) being recorded for a first time and one, (T. pugile pseudopugile Sarti), is determined on the base of specimens from Preda Colection In addition to the species listed, now there are six other species that enrich the association: T. greenackeri (Moesch), T. pseudoflexuosum (Fav.), T. cf. platyconcha (Gemm.), T. af. subcallicerum (Gemm.) and T. pugile pugiloides (Canav.), unknown in the region until now.
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This study deals with the scientific importance of three paleontological sites from the vicinity of the Svinita village and a way of approach the sustainable exploitation of their touristic potential. The three sites are open carbonate... more
This study deals with the scientific importance of three paleontological sites from the vicinity of the Svinita village and a way of approach the sustainable exploitation of their touristic potential. The three sites are open carbonate deposits that belong to three sedimentary formations, fossiliferous, of Upper Jurassic age-Lower Cretaceous. If the sites, from the Vodiniciki Valley and the one on the national road, to the south of Svinița, were known from previous authors (RĂILEANU, 1959; AVRAM, 1976; GRIGORE, 1998), the third one was recently discovered and analysed (2021). It is easily accessible, being also on the national road, to the north of Svinița and close to the Saraorski Valley.
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The paper is a review of the species Taramelliceras compsum Oppel, which has been assigned various other forms / species (OLORIZ, 1978; SAPUNOV, 1979; SARTI 1993) as subspecies, morphotypes or varieties. Here we considered most of the... more
The paper is a review of the species Taramelliceras compsum Oppel, which has been assigned various other forms / species (OLORIZ, 1978; SAPUNOV, 1979; SARTI 1993) as subspecies, morphotypes or varieties. Here we considered most of the forms under the morphotypes rank: T (T) compsum compsum, T (T) compsum holbeini, T (T) compsum franciscanum, T (T) compsum hemipleurum, T (T) compsum kochi and two more new ones are proposed subspecies T (T) compsum bicostatum and T (T) compsum tuberculatum, all forms/subspecies found in the same formation "Beds with Acanthicum", from the Kimmeridgian from Ghilcoș (Hăghimaș Mountains, Romania).
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Species of the ammonite genus Glochiceras from the Kimmeridgian-Tithonian deposits of Ghilcoș (Hăghimaș Mts, Romania) are described and figured. In addition to specimens from the author's collection, previously reported occurrences of... more
Species of the ammonite genus Glochiceras from the Kimmeridgian-Tithonian deposits of Ghilcoș (Hăghimaș Mts, Romania) are described and figured. In addition to specimens from the author's collection, previously reported occurrences of this genus from the same area described by NEUMAYR (1873), HERBICH (1878) and PREDA (1973) are discussed. Five species of the genus Glochiceras are reported from the Hăghimaș Mts for the first time: Glochiceras (Glochiceras) lens, G. (Lingulaticeras) modestum, G. (L.) semicostatum, G. (L.) lingulatum and G. (L.) procurvum. Special attention is paid to insufficiently known species G. jugens, G. balanense and G. tenuifalcatum described by NEUMAYR (1873).
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... crenosum crenosum, *G. (Glochiceras) lens, Taramelliceras intersistens, *T. acallopistum, T. (T.) pugile pugile, T. (T.) mikoi, Hemihaploceras (H.) nobile, *H. (H.) loczy, *H. (Zitteliceras) schwageri, Sutneria (E.) subeumela,... more
... crenosum crenosum, *G. (Glochiceras) lens, Taramelliceras intersistens, *T. acallopistum, T. (T.) pugile pugile, T. (T.) mikoi, Hemihaploceras (H.) nobile, *H. (H.) loczy, *H. (Zitteliceras) schwageri, Sutneria (E.) subeumela, Lithacoceras ulmense ... Page 10. DAN GRIGORE 186 ...
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This paper deals with the taxonomic study of the oppeliidas (Streblitinae) and haploceratidas from the Kimmeridgian-Tithonian deposits from Ghilcoș and Ciofronca (Hăghimaș Mts). Fore species of Streblitinae are now described in addition... more
This paper deals with the taxonomic study of the oppeliidas (Streblitinae) and haploceratidas from the Kimmeridgian-Tithonian deposits from Ghilcoș and Ciofronca (Hăghimaș Mts). Fore species of Streblitinae are now described in addition to those known to date from these localities and haploceratidas previously described by PREDA (1973) are reviewed. For the first time species belonging to Semiformiceras Spath, 1925 are described from the studied region. Rezumat. Oppelide și haploceratide din depozitele jurasic superioare din Munții Hăghimaș (Carpații Orientali-România). În lucrare este prezentat studiul taxonomic al speciilor din Familia Oppeliidae-Subfamilia Streblitinae și Familia Haploceratidae găsite în depozitele kimmeridgian-tithoniene din Ghilcoș și Ciofronca (Munții Hăghimaș). Sunt descrise acum alte patru specii de Streblitinae pe lângă cele cunoscute până în prezent din aceste aflorimente și, revizuite haploceratidele prezentate anterior de PREDA (1973). Pentru prima dată sunt descrise din regiune specii de Semiformiceras Spath, 1925.
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The current paper presents the inventory of a new paleontological collection donated by prof. Victoriţa Nicolae of the " Carsium " Museum from the city of Hârşova – Dobrogea (Romania). The fossils were gathered during many decades by... more
The current paper presents the inventory of a new paleontological collection donated by prof. Victoriţa Nicolae of the " Carsium " Museum from the city of Hârşova – Dobrogea (Romania). The fossils were gathered during many decades by prof. Nicolae along with her students, from the open sites along the Danube shore (Hârşova – Topalu), from the sedimentary deposits of various ages (Jurassic, Cretaceous, Pliocene), but especially from the Oxfordian limestone deposits. The fossils are from various invertebrate groups like: sponges, corals, bryozoans, bivalves, gastropods, ammonites, brachiopods and others. The fauna was analyzed for two years by the authors of this paper, within the ERCIP project. The collection will be registered as part of the Collection of the Museum of National History and Archaeology from Constanţa (MINAC). The collection contains almost 500 paleontologial samples out of which 300 will be presented in this paper, chosen as most representative. Résumé. Cet article présente un inventaire de la nouvelle collection paléontologique donnée par le professeur Victoriţa Nicolae pour le Museum " Carsium " de Hârşova – Dobrogea (Roumanie). Les fossiles ont été collectés pendant plusieurs décennies par le professeur et ses élèves en sites ouverts sur la rive de Danube (Hârşova – Topalu), en dépôts sédimentaires de différents âges (Jurassique, Crétacé, Pliocène), mais surtout dans les calcaires de l'Oxfordien. Les fossiles appartiennent à divers groupes d'invertébrés marins: éponges, coraux, bryozoaires, bivalves, gastéropodes, ammonites, brachiopodes et autres. La faune a été étudiée pendant deux ans par les auteurs de cet article, sur le projet ERCIP. Cette collection sera enregistrée dans le Musée de l'Histoire Nationale et d'Archéologie de Constanţa (MINAC). La collection contient près de 500 échantillons paléontologiques. Dans cet article sont analysés et présentés les plus représentatifs 300 échantillons.
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A museal entertaining and educational activity "Age of Dinosaurs" held in 2006-2007 at the National Museum of Geology from Bucharest.
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Abstract. In this paper there are described species from the groups of Phylloceratids, Lytoceratids and Aspidoceratids found in the Kimmeridgian-Tithonian deposits from Ghilcoş and Ciofronca (Hăghimaş Mts – Eastern Carpathians). There... more
Abstract. In this paper there are described species from the groups of Phylloceratids, Lytoceratids and
Aspidoceratids found in the Kimmeridgian-Tithonian deposits from Ghilcoş and Ciofronca (Hăghimaş Mts –
Eastern Carpathians). There are presented 13 taxa of Phylloceratidae Family and all the species and specimens
described by previous authors are revised: Herbich (1878), Neumayr (1871, 1873) and Preda (1973). Ph. leptoptychum
described species and Herbich Ph. bekasense (1878) are proposed here for invalidation (nomen nudum). From
the Lytoceratids that are first signalised in this region: Lytoceras polycyclum camertinum, Lytoceras orsinii,
Lytoceras sutile, Lytoceras liebigi, Lytoceras strambergense, and Protetragonites quadrisulcatus. P. quadrisulcatus
existentence is confirmed now here. From the Aspidoceratidae Family some specimens of the genera Simocosmoceras
SPATH and Sutneria ZITTEL are described and are also revised the specimens of Herbich (1878), Neumayr
(1873) and Preda (1973), belonging to mentioned genera. The group of Sutneria ZITTEL are presented here with
new species discovered in this region, and with a rich assemblage that comprise 13 species and many
specimens. Specimens previously collected by Herbich (1878), Neumayr (1873) and Preda (1973) and species
of the groups of S. platynota (REINECKE) and S. eumela (D’ORBIGNY) are reviewed. The new species are:
Sutneria (S.) spinata, S. (S.) carpathica and S. (Enosphinctes) zeissi.
Aspidoceratids found in the Kimmeridgian-Tithonian deposits from Ghilcoş and Ciofronca (Hăghimaş Mts –
Eastern Carpathians). There are presented 13 taxa of Phylloceratidae Family and all the species and specimens
described by previous authors are revised: Herbich (1878), Neumayr (1871, 1873) and Preda (1973). Ph. leptoptychum
described species and Herbich Ph. bekasense (1878) are proposed here for invalidation (nomen nudum). From
the Lytoceratids that are first signalised in this region: Lytoceras polycyclum camertinum, Lytoceras orsinii,
Lytoceras sutile, Lytoceras liebigi, Lytoceras strambergense, and Protetragonites quadrisulcatus. P. quadrisulcatus
existentence is confirmed now here. From the Aspidoceratidae Family some specimens of the genera Simocosmoceras
SPATH and Sutneria ZITTEL are described and are also revised the specimens of Herbich (1878), Neumayr
(1873) and Preda (1973), belonging to mentioned genera. The group of Sutneria ZITTEL are presented here with
new species discovered in this region, and with a rich assemblage that comprise 13 species and many
specimens. Specimens previously collected by Herbich (1878), Neumayr (1873) and Preda (1973) and species
of the groups of S. platynota (REINECKE) and S. eumela (D’ORBIGNY) are reviewed. The new species are:
Sutneria (S.) spinata, S. (S.) carpathica and S. (Enosphinctes) zeissi.
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1. Paralela intre activitatea solara, fluctuatiile campului magnetic terestru din Romania si activitatea seismica vranceana; 2. Studiu privind fenomenul seismic, factori declansatori determinanti si evolutia fenomenelor naturale dintr-o regiune seismica. Studiu de caz: seismele din Vrancea si...more
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This study deals with the seismic prognosis for Romanian territory on the base of several methods, more or less usual or generally accepted. As a final result, is revealed a potential increase of magnitude of events in our territory... more
This study deals with the seismic prognosis for Romanian territory on the base of several methods, more or less usual or generally accepted. As a final result, is revealed a potential increase of magnitude of events in our territory starting in 2024. At the same time, following the presented analyses, the possibility of producing a large-magnitude "crustal" earthquake is highlighted.
So far, numerous prognosis methods or models have been tested in world seismology, most of them based on statistical or astrophysical calculations, "formulas" that have not met the rigors of a reliable seismic forecasting. There have been researches and attempts to forecast earthquakes and in Romania, in particular generated by the Vrancea area. Such long- or medium-term forecasts based on statistic methods they were looking for a recurrence of large earthquakes. There are also other analyses which revealed a particular seismic evolution before some big earthquakes (such as the “seismic quiescence”). In the last decade there have also been attempts to highlight a precursor seismic series, based on analyses of seismic sequences that preceded major earthquakes (Italy, Japan) and also, a precursory seismic phenomenon called "seismic swarm" was highlighted.
Without the pretense that the present study would solve the problem of seismic forecasting, we brought some news. A novelty consists in the global analysis of the seismicity of the territory, of the three seismic clusters, crustal and the two subcrustal of the Vrancea seismogenic body (Grigore et al., 2008) which highlights the interrelationships between them. A deterministic method of earthquakes is discussed, analyzed and tested on several seismic sequences from the local, regional or global evolution, related to the important earthquakes in Romania, in time and space. The results of the advanced with reserves forecasts based on this method were also verified by a parallel analysis of the peak recurrence, taking into account the leveling of magnitudes and the dependence on potential generating factors, some of them cyclical - terrestrial tides, solar activity, large earthquakes on the globe, etc. Also, the seismic evolution from us is discussed in relation to the regional or global evolution based on some sequences and relative to the tectonic structure and the lateral transfer of stress. Following the analysis, a new model of the mechanism of the production of earthquakes in Vrancea is advanced, which can better verify its particular evolution in a global context, its sunken body evidently not being isolated.
So far, numerous prognosis methods or models have been tested in world seismology, most of them based on statistical or astrophysical calculations, "formulas" that have not met the rigors of a reliable seismic forecasting. There have been researches and attempts to forecast earthquakes and in Romania, in particular generated by the Vrancea area. Such long- or medium-term forecasts based on statistic methods they were looking for a recurrence of large earthquakes. There are also other analyses which revealed a particular seismic evolution before some big earthquakes (such as the “seismic quiescence”). In the last decade there have also been attempts to highlight a precursor seismic series, based on analyses of seismic sequences that preceded major earthquakes (Italy, Japan) and also, a precursory seismic phenomenon called "seismic swarm" was highlighted.
Without the pretense that the present study would solve the problem of seismic forecasting, we brought some news. A novelty consists in the global analysis of the seismicity of the territory, of the three seismic clusters, crustal and the two subcrustal of the Vrancea seismogenic body (Grigore et al., 2008) which highlights the interrelationships between them. A deterministic method of earthquakes is discussed, analyzed and tested on several seismic sequences from the local, regional or global evolution, related to the important earthquakes in Romania, in time and space. The results of the advanced with reserves forecasts based on this method were also verified by a parallel analysis of the peak recurrence, taking into account the leveling of magnitudes and the dependence on potential generating factors, some of them cyclical - terrestrial tides, solar activity, large earthquakes on the globe, etc. Also, the seismic evolution from us is discussed in relation to the regional or global evolution based on some sequences and relative to the tectonic structure and the lateral transfer of stress. Following the analysis, a new model of the mechanism of the production of earthquakes in Vrancea is advanced, which can better verify its particular evolution in a global context, its sunken body evidently not being isolated.