Sarka Krizova Jonasova

The Czech Academy of Sciences | AVCR · Institute of Geology

The distribution of olive and fusiform beads, geographically limited to Bohemia, Moravia (Czech Republic), Bavaria (Germany) and its surrounding area in the eighth–tenth centuries, suggests local central European glass-working. Archaeological differences in regional preference for olive or fusiform beads, typological details and their not entirely...

With its at least 100 graves, the Migration period cemetery in Záluží by Čelákovice, Praha-východ district, investigated in the 1920s and 1930s ranks among the largest and most important sites from the end of the 5th to the middle of the 6th century AD in Bohemia. The same applies to the assemblage of glass composed of 168 beads and several additio...

Representative samples covering all petrographic types of the Miocene subvolcanic (dykes and sills) basalt–trachyte rock association from the Uherský Brod area (UB, Moravia) in the Czech Republic were studied. The UB area is associated with the Klippen Zone in the neighbourhood of the contact of the Carpathian–Pannonian Block with the Bohemian Mass...

The complex detailed analysis and publication of archaeological and anthropological data and the results of numerous science analyses of archaeological and anthropological material (palaeopathology, epigenetics, isotope analysis, 14C, analyses of metal, amber, stone tools, Sr, O, C and N isotopy etc.) form an essential foundation of the first-rate,...

The Australasian tektite (AAT) strewn field is the largest strewn field on the Earth with about ∼10–30% coverage, both land and ocean, but a clearly identified source impact crater is absent despite the young age of AAT of ca. 790 ka. A genetic link between the Australasian tektites and their unequivocal parental materials is therefore largely impo...

The Late Iron Age–La Tène period in Europe outside the Hellenistic world is characterised by specific glass products in the third to first centuries BC. Evidence of glass-working together with large collections of products (bracelets, ring-beads and other beads) have been reported from several central settlements (e.g. Němčice and Staré Hradisko in...

Australasian Muong Nong-type tektites from the locality centered at 16.46150° N, 106.48917° E in Laos contain sporadic spherical heterogeneous sulfide inclusions less than 10 μm in diameter, which have been identified by electron probe microanalyzer and electron backscatter diffraction to represent a mixture of rare mineral shenzhuangite with a pyr...

The Uherský Brod area volcanism (UB, Moravia) in the Czech Republic is spatially associated with the Klippen Zone situated in the proximity to the contact of the Carpathian-Pannonian region with the Bohemian Massif (Hrouda et al., 2015). Volcanic rocks from the UB area only partly resemble rocks in a similar structural position in the coeval Pienin...

Extremely low and variable concentrations of osmium (Os) and other highly siderophile elements (HSE) in most tektites make it challenging to establish direct links between these impact-related materials and their possible extraterrestrial contribution. New Os concentrations (2–43 ppt) and ¹⁸⁷ Os/ ¹⁸⁸ Os ratios (0.131–0.68) in a suite of fifteen wel...

Major and trace element analyses and triple oxygen isotope measurements were performed on 11 individual specimens of Australasian tektites (AAT) with exactly known field positions from Laos. The sample set was dominated by Muong Nong‐type tektites (MNAAT), including separated layers of glass of different appearance and chemistry from four samples....

The site of Staré Hradisko in the Czech Republic, a Late Iron Age hillfort – oppidum of the La Tène culture settled in 2nd–1st cent. BCE provided a large collection of glass together with evidence of glass-working. Besides typical La Tène products such as glass bracelets, beads and pendants, glass vessel fragments also come from archaeological exca...

This is the first detailed study using 55 major, minor and trace elements in archaeological glass from the period of 1650–1800 from two cesspits at Prague Castle, the Czech Republic. These glasses were obtained during archaeological excavations in 1920s. Among the forty analyzed samples, a single specimen of the so-called high-lime low-alkali glass...

Amphibole phenocrysts, xenocrysts and cumulate xenoliths from Cenozoic volcanic rocks of the Bohemian Massif (BM) belong to the magnesio-hastingsite–pargasite–kaersutite series. Their host rocks are mostly basaltic lavas, stocks, dykes and breccia pipe fills, less commonly also felsic rocks. Felsic rocks with amphibole cumulate xenoliths represent...

Chemical fingerprints of impacts are usually compromised by extreme conditions in the impact plume, and the contribution of projectile matter to impactites does not often exceed a fraction of per cent. Here we use chromium and oxygen isotopes to identify the impactor and impact-plume processes for Zhamanshin astrobleme, Kazakhstan. ε⁵⁴Cr values up...

Tachylytes from rift-related volcanic rocks were recognized as: (i) irregular veinlets in host alkaline lava flows of the Kozákov volcano, Czech Republic, (ii) (sub)angular xenoliths in alkaline lava of the feeding channel of the Bukovec volcano, Czech Republic, and (iii) paleosurface of a tholeiitic lava flow from Hafrafell, Iceland. The tachylyte...

Impact processes are natural phenomena that contribute to a variety of physico–chemical mechanisms over an extreme range of shock pressures and temperatures, otherwise seldomly achieved in the Earth’s crust through other processes. Under these extreme conditions with transient temperatures and pressures ≥3,000K and ≥100 GPa, followed by their rapid...

Quantification procedures based on the external calibration with total sum content standardization (ECTSCS) and the external calibration with internal standardization (ECIS) were compared in the analysis of glass materials by laser ablation inductively coupled plasma spectrometry (LA-ICP-MS) with a 213 nm Nd:YAG laser ablation device and a quadrupo...

Kahf Kharrat Najem Cave is a small cave in United Arab Emirates (UAE) that hosts a bat colony which is the source of guano deposits and peculiar centimeter-long yellowish stalactites. The mineralogy and geochemistry of these deposits were analyzed using powder X-ray diffraction (XRD), energy dispersive X-ray spectroscopic microanalysis (EDX), scann...

Internal structure and element chemistry including contents of highly siderophile elements (HSE) and Os isotope ratios have been studied in target rocks and several groups of impact glasses of the Zhamanshin impact structure, Kazakhstan. These include larger irregularly-shaped fragments and blocks of impact glass (zhamanshinite), and three types of...

Moldavites, tektites of the Central European strewn field, have been traditionally linked with the Ries impact structure in Germany. They are supposed to be derived mainly from the near-surface sediments of the Upper Freshwater Molasse of Miocene age that probably covered the target area before the impact. Comparison of the chemical composition of...

Moldavites are known to occur in several geographically limited areas in Central Europe: South Bohemia, Western Bohemia (Cheb Basin), Western Moravia, the Horn area in Upper Austria, and Lusatia in Germany. In addition to these traditional finds, Central European tektites (CET) have recently been identified in Neogene sediments at three places in L...

The Ni-Cu-(PGE) mineralization at Rožany is located in the northern part of the Bohemian Massif and it is hosted by gabbroic dykes (dolerites) cross-cutting the granitic Lusatian Granitoid Complex. The intrusion of dolerite is newly well constrained by in-situ LA-ICP-MS U-Pb zircon age of 349 ± 3 Ma (2σ), which is much younger than previous K-Ar an...

We present a generic sol–gel approach for the preparation of nanocrystalline Dy2Ti2O7. This approach allows the preparation of powders and highly transparent thin films having nanocrystals of a tailored size. The thermal evolution of these nanocrystals was followed by conventional structural methods and furthermore, we determine both the kinetic pa...

Imported artefacts from the Late La Tene period also include mosaic glass vessels produced using millefiori, reticella and ribbon mosaic glass techniques. The artefacts are part of the assemblages from the oppida of Stradonice and Stare Hradisko and from the Jicina-Pazaha hillfort of the Puchov culture. Their origin can be traced to a Hellenistic w...