Pliensbachian to Aalenian radiolarians from 220 samples collected at 30 localities around the world were studied. A database of 197 widely distributed species was used to construct a Unitary Association (UA) zonation for the interval. The resulting 39 UAs were merged into nine zones. These zones can be correlated worldwide and link previously established UA zonations for the Hettangian-Sinemurian and the Middle to Upper Jurassic. The paper is a reference publication in radiolarian biochronology of the Jurassic.
COBISS.SI-ID: 31903021
Mesozoic cherts and calcareous turbidites of the Pichakun Basin (Zagros Mountains) were studied. Radiolarians were used to define and date four lithostratigraphic units that span the interval from the Lower Jurassic to the middle Cretaceous. Based on sequence stratigraphy (stacking pattern), five second-order cycles were defined and interpreted primarily with respect to regional tectonics. The paper presents the first detailed sedimentological and biostratigraphic studies in Mesozoic basinal successions of southern Iran.
COBISS.SI-ID: 31533101
Two nannoplankton species are newly described from the Badenian marls in Slovenske gorice. They were found in the nannoplankton biozone NN5 and occur in assemblages indicating warm and stable, relatively deep and oligotrophic environments. The paper is an important taxonomic contribution to a more complete knowledge on Miocene nannoplankton from the Central Paratethys.
COBISS.SI-ID: 31992109
Laboratory experiments were done to test insecticidal activity of diatomaceous sediments from several localities in Slovenia, Greece and Serbia. The tests were carried out at different temperatures, humidity and concentrations of the agent. We observed that the most significant factor increasing insecticidal activity is silica content. The samples from Slovenian localities were more effective at higher relative humidity (75%) while while the efficiency of other samples increased with lowered humidity. This fact is related to higher content of clay minerals in Slovenian samples.
COBISS.SI-ID: 6320761
We compared insecticidal activity of different sediments with high content of silica. Positive correlation was observed between the mortality of rice weevil and opal-A content in the sediment, whereas SiO2 in form of quartz does not increase the insecticidal activity.
COBISS.SI-ID: 6465145