We presented new stratigraphic results on the Pliensbachian to Coniacian Musallah Formation. This formation consists of bedded radiolarian cherts punctuated by coarse-grained breccias and conglomerates. Radiolarian analyses allowed us to establish the time span of chert-dominated intervals, to constrain the ages of the intervening mass-flow deposits and to provide evidence of considerable stratigraphic gaps. Stratigraphic correlation across the entire Hawasina Basin was used to discuss the paleogeographic location of the Al Aridh Group and to relate the stratigraphic discontinuities with major subsidence pulses.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 38878509Within the professional supervision of implementation of the program of geochemical and hydrogeochemical research for the needs of the NSRAO landfill we conducted field and cabinet work. In the field, we attended and supervised the sampling procedure of groundwater and sediments from five wells and checked laboratory procedures. For each segment of field and laboratory works, we examined, commented, provided opinions and proposals for amendments to the received documents and questions.
D.06 Final report on a foreign/international project
COBISS.SI-ID: 1214046In the search for an effective and sustainable control method against the maize weevil (Sitophilus zeamais Motschulsky), different inert dusts were tested under laboratory conditions. We treated wheat grains with quartz sand, zeolites, and diatomeaceous earth. Inert dusts of different origins were used, namely diatomaceous earth from Slovenia and SilicoSec®, quartz sands from two locations from Slovenia, two different zeolites from Slovenia, and synthetic zeolite Asorbio®. The substances were tested at three different temperatures and two different relative humidity levels. Mortality was measured 7th, 14th and 21st day after exposure. Mortality of S. zeamais was significantly the highest in treatments exposed to higher temperature (25 ºC), and in treatments exposed to higher concentrations (900 ppm) of inert dusts. The analysis of pooled results provoked significantly the highest mortality of beetles in treatments with SilicoSec®, and in treatment with one type of Slovenian zeolite.
F.06 Development of a new product
COBISS.SI-ID: 8334201Soil of the lower valley of the river Dragonja developed under specific soil forming factors. Alluvial sediments originating from surroundig hills mostly of flysh sequence rocks as a parent material, Mediterranian climate and the vicinity of the sea influenced soil development. Field examinations revealed that soil have stable blocky or subangular structure and do not express intensive hydromorphic forms. Soil pH was in the range from 6.9 to 7.5. In most locations electro conductivity (ECe) did not exceed 2 ds/m. Base saturation was high (up to 99 %), Ca2+ ions were prevailing. Exchangeable sodium percentage (ESP) was in the range from 0.2 to 3.8 %, which is higher compare to other Slovenian soil but do not pose a risk to soil structure. Soil has silty clay loam texture with up to 66 % of silt. Prevailing minerals were quartz, calcite and muscovite/illite. No presence of swelling clay mineral montmorillonite was detected. According to Slovenian soil classification we classified soil as alluvial soil. According to WRB soil classification soil was classified as Cambisol.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 1198174We have analyzed carbon and oxygen stable isotope signatures of calcite moonmilk in four Slovenian karst caves: Brezno za hramom, Snežna jama, Košelevka and Potočka Zijalka. The moonmilk δ13C values show a much wider variability than δ18O values. Differences in δ13C for each cave are related with the fossil or active character of each sample and with the hydrological conditions. Lighter values have been observed in subaqueous or water saturated moonmilk. The relatively higher δ13C values observed in Potočka Zijalka can be related with a stronger degassing due to its more open-character. A possible biologically-induced origin for fibrous microcrystalline calcite is not supported by our data, since a fractionation effect due to microbial activity would lead to more homogeneous and lower δ13C values. In the studied caves, we attribute the isotopic signal variations to local differences in water chemistry and hydrological setting corresponding to different moonmilk morphological types.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 38655789