Laboratory for sample preparation:

  • Chemical hood, to etch the samples with HCl and HF
  • Oven, to dry the radiolarian residues
  • Laboratory heating plates
  • Ultrasonic bath

Sample analyses:

  • LEICA MZ12,5 microscope with planapo 1x lens
  • LEICA MZ8 microscope with planapo 1,6x lens
  • LEICA M3c microscope with planapo 1,5x lens
  • Volpi fiber optic illuminator
  • OLYMPUS BX51 microscope with PlanFL lenses
  • Digital camera for transmitted and reflected light microscopes (15.1 megapixel)


Dr. Marco Chiari (CNR Researcher - Head Laboratory)



+39 055 2757533 (Dr. Marco Chiari)




Radiolarians are extracted from the carbonatic rocks using acetic acid (CH3COOH) or hydrochloric acid (HCL) and from siliceous rocks using low concentration hydrofluoric acid (HF). Afterwards they are picked from the residues, with a picking brush, to a storing cell under a stereomicroscope (at 40 or 80 magnifications). Successively the radiolarians are mounted on an aluminum stub with a carbon conductive tab (from 50 to 100 specimens for stub).
The radiolarians mounted on the stub are observed at the scanning electron microscope (SEM) and the taxonomic study is made with the photos taken with SEM.


  • PRIN 2006. "Structural and stratigraphic studies on the Varda-Zlatibor (Bosnia-Hercecovina and Serbia) ophiolitic massifs and on those of Pindos-Vourinos and Koziakas-Othrys (Northern Greece); comparison with other Greek (Evia-Argolis-Crete) - Albanian (Mirdita) ophiolitic massifs". Scientific responsible of the Research Unit and scientific coordinator of the Project Prof. G. Principi.
  • Progetto di ricerca "Assessing the tectono-sedimentary evolution of deep margins based on the investigation of the syn-tectonic sedimentary sequence associated with detachment systems exposed in the Err Nappe; SE Switzerland" (2007-2010). Scientific responsible Prof. G. Manatschal (EOST Strasbourg"
  • PRIN 2008. "Geological, structural and stratigraphic studies on the ophiolites and mélanges of the Izmir-Ankara-Erzincan suture, central-eastern Turkey, and comparisons with the sub- Pelagonian Dinaric-Hellenic ophiolites" Scientific responsible of the Research Unit and scientific coordinator of the Project Prof. G. Principi.
  • PRIN 2010-2011. “The Opholitic sutures of the Alpine-Himalayan chains: analysis of two transects across the Dinaric-Hellenic and the Anatolian zones". Scientific responsible of the Research Unit Prof E. Pandeli, scientific coordinator of the Project Prof. G. Capponi.


  • Integrated stratigraphic researches on the Jurassic and Cretaceous sequences of the Southern Alps, Sicily and on the Cretaceous anoxic levels of the Umbro-Marche Apennines.
  • Radiolarian biostratigraphy of the sedimentary cover of ophiolites in the Northern Apennines (Italy), Central America,Carribean area, Iran.
  • Biostratigraphic study of the Triassic and Jurassic oceanic and continental sequences in the Dinaric-Hellenic chain (Albania and Greece).
  • Taxonomic researches on Middle-Late Triassic, Jurassic and Cretaceous radiolarians.


  • Chiari M., Marcucci M., Cortese G., Ondrejickova A. and Kodra A., (1996). Triassic Radiolarian assemblages in the Rubik area and Cukali zone, Albania. Ofioliti, 21 (1): 77-84.
  • Chiari M., Cortese G., Marcucci M. and Nozzoli N., (1997). Radiolarian biostratigraphy in the sedimentary cover of the ophiolites, of south-western Tuscany, Central Italy. Eclogae Geol. Helv., 90: 55-77.
  • Coccioni R., Baudin F., Cecca F., Chiari M., Galeotti S., Gardin S. and Salvini G., (1998). Integrated stratigraphic, palaeontological, and geochemical analysis of the uppermost Hauterivian Faraoni Level in the Bosso section, Umbria-Marche Apennines, Italy. Cretaceous Research, 19: 1-23.
  • Chiari M., Marcucci M. and Prela M., (2002). New species of Jurassic radiolarian in the sedimentary cover of ophiolites in the Mirdita area, Albania. Micropaleontology,vol. 48, suppl. 1: 61-87.
  • Bortolotti V., Carras N., Chiari M., Fazzuoli M., Marcucci M., Photiades A. and Principi G., (2003). The Argolis peninsula in the palaeogeographic and geodynamic frame of the Hellenides. Ofioliti, 28 (2), 79-94.
  • Chiari M., Bortolotti V., Marcucci M., Photiades A. and Principi G., (2003). The Middle Jurassic siliceous sedimentary cover at the top of the Vourinos ophiolite (Greece). Ofioliti, 28 (2): 95-103.
  • Chiari M., Baldanza A. and Parisi G., (2004). Integrated stratigraphy (radiolarians and calcareous nannofossils) of the Jurassic siliceous sediments from Monte Kumeta (western Sicily, Italy). Rivista Italiana di Paleontologia e Stratigrafia, 110 (1): 129-140.
  • Chiari M., Marcucci M. and Prela M., (2004). Radiolarian assemblages from the Jurassic cherts of Albania: new data. Ofioliti, 29 (2): 95-105.
  • Scopelliti G., Bellanca A., Coccioni R., Luciani V., Neri R., Baudin F., Chiari M. and Marcucci M., (2004). High-resolution geochemical and biotic records of the Tethyan ‘Bonarelli Level’ (OAE2, Latest Cenomanian) from the Calabianca-Guidaloca composite section, nortwestern Sicily, Italy. Palaeogeography, Palaeoclimatology, Palaeoecology, 208 (3-4): 293-317.
  • Chiari M., Dumitrica P., Marroni M., Pandolfi L. and Principi G., (2006). Radiolarian biostratigraphic evidence for a Late Jurassic age of the El Tambor group ophiolites (Guatemala). Ofioliti 31 (2): 141-150.
  • Chiari M., Cobianchi M. and Picotti V., (2007). Integrated stratigraphy (radiolarians and calcareous nannofossils) of the Middle to Upper Jurassic Alpine radiolarites (Lombardian Basin, Italy): Constraints to their genetic interpretation. Palaeogeography, Palaeoclimatology, Palaeoecology, 249: 233-270.
  • Chiari M., Di Stefano P., Parisi G. (2008). New stratigraphic data on the Middle-Late Jurassic biosiliceous sediments from the Sicanian basin, Western Sicily (Italy). Swiss J. Geosci. 101: 415-429.
  • Chiari M., Djerić N., Garfagnoli F., Hrvatović H., Krstić M., Levi N., Malasoma A., Marroni M., Menna F., Nirta G., Pandolfi L., Principi G., Saccani E., Stojadinović U. and Trivić B. (2011). The geology of the Zlatibor-Maljen area (western Serbia): a geotraverse accross the ophiolites of the Dinaric-Hellenic collisional belt. Ofioliti, 36 (2): 139-166.
  • Chiari M., Bortolotti M., Marcucci M., Photiades A., Principi G. and Saccani E. (2012). Radiolarian biostratigraphy and geochemistry of the Koziakas Massif ophiolites (Greece). Bull. Soc. géol. Fr., 183 (4): 287-306
  • Chiari M., Baumgartner P.O., Bernoulli D., Bortolotti V., Marcucci M., Photiades A. and Principi G. (2013). Late Triassic, Early and Middle Jurassic Radiolaria from ferromanganese-chert ‘nodules’ (Angelokastron, Argolis, Greece): evidence for prolonged radiolarite sedimentation in the Maliac-Vardar Ocean. Facies, 59: 391-424.
  • Bortolotti V., Chiari M., Marroni M., Pandolfi L., Principi G. and Saccani E (2013). Geodynamic evolution of the ophiolites from Albania and Greece (Dinaric-Hellenic Belt): one, two or more oceanic basins? International Journal of Earth Sciences (Geol Rundsch), 102: 783-811.
  • Bortolotti V., Chiari M., Göncüoglu M.C, Marcucci M., Principi G., Tekin U.K., Saccani E and Tassinari R. (2013) Age and Geochemistry of basalt-chert associations in the Ophiolites of the Izmir-Ankara Mélange east of Ankara, Turkey: preliminary data. Ofioliti 38 (2): 157-173.
  • Muttoni G., Tartarotti P., Chiari M., Marieni C., Rodelli D., Dallanave E. and Kirscher U. (2015). Paleolatitudes of Late Triassic radiolarian cherts from Argolis, Greece: insights on the paleogeography of the western Tethys. Palaeogeography, Palaeoclimatology, Palaeoecology 417: 476-490
  • Gomez B., Giusberti L., Roghi G., Chiari M., Daviero-Gomez V. and Ewin T. (2015). Cretaceous conifers and angiosperms from the Bonarelli Level; Reassessment of Massalongo’s plant fossil collections of Monte Colle, Lessini Mountains, northern Italy. Cretaceous Researches, 52: 179-193.
  • Saccani E., Chiari M., Bortolotti V., Photiades A. and Principi G. (2015). Geochemistry of volcanic and subvolcanic rocks and biostratigraphy on radiolarian cherts from the Almopias ophiolites and Paikon unit (Western Vardar, Greece). Ofioliti, 40 (1): 1-25.