Vladimír Šimo

• PhD
• Researcher at Slovak Academy of Sciences

Highly-bioturbated "spotted" limestones and marls (Fleckenmergel-Fleckenkalk facies) of the Early Jurassic, which were deposited in broad and recurrent deep-shelf habitats of the Northern Tethys, are characterized by rare benthic carbonate-producing macroinvertebrates. To address this paradox, we analyse trace-fossil assemblages in a ∼85 m-thick su...

Zavitokichnus fusiformis n. igen. et n. isp. occurs in Lower Cretaceous (Valanginian to Hauterivian) limestones of the Fatric Superunit in the Western Carpathians. Typical cross sections of this more or less spiral trace fossil are sometimes U–O–C–S-shaped. In cross-section the trace fossil passes from a simple linear form, and spreads to a wider r...

The trace fossils of the spotted limestones and marls from upper Pliensbachian of the Skladaná Skala section, Western Carpathians (Slovakia), are characteristic of Zoophycos ichnofacies preserved in outer shelf deposits. The ichnoassociation is dominated by Lamellaeichnus and Chondrites, while Palaeophycus, Planolites, Teichichnus, Thalassinoides,...

A new find of one specimen of the relatively rare trace fossil Radhostium carpaticum is the subject of this morphological study. The new find from the Biele Karpaty Unit, is preserved on the soles of turbiditic sandstones within the Upper Cretaceous and Eocene turbiditic sequence of the Svodnice Formation in the Biele Karpaty Mountains, Slovakia. T...

The depocenters of epicontinental basins usually comprise relatively continuous depositional records, and these can be used in the determination of sediment routing and paleogeographic changes via a set of various geophysical, sedimentological, biostratigraphic and geochronological approaches. Although the margins of such basins will have a major r...

Intensively bioturbated hemipelagic limestone of the Fleckenmergel facies is regarded as an equivalent of the Allgäu Formation. Studied outcrops within the sequence of the bioturbated limestone are situated in the westernmost part of Periklippen Zone (respectively Klippen Zone). Mentioned Middle Jurassic bioturbated limestone belongs to the younges...

Micritic sediments containing dark, discrete, organic-rich burrows, situated in a light grey background carbonate mud, were deposited over a broad geographic area in deep-shelf, bathyal, and basinal environments in the western margin of the Tethys Ocean during the Early and Middle Jurassic. These hemipelagic deposits represent a distinct deposition...

The presented work summarizes knowledge on the Lunz Beds in the Hronic Považie and Ostrá Malenica nappes of the eastern portion of the Strážovské vrchy Mts. It is based mainly on the results of field research and geological mapping in the area of the Zliechovská hornatina and Nitrické vrchy Mts. The studied rocks are mainly gray-green or brown sand...

The Miocene genus Rzehakia, an endemic brackish bivalve that lived in the Paratethys Sea, recorded in late Ottnangian sediments deposited during the regression of the Central Paratethys Sea in the semi-enclosed Alpine-Carpathian foreland basin, is closely related to the Rzehakia found hundreds of kilometres away in the early Badenian transgressive...

A new kind of trace fossil characterized by filled ellipsoidal chambers interconnected by a boxwork of burrows, shafts and tunnels, in different horizontal planes, is observed in the medium-grained fluvial sandstone of the Pliocene Lower Tipam Formation in the Amarpur area of Tripura in northeast India. The chambers have variable dimensions with le...

The chemostratigraphic record of the Toarcian Oceanic Anoxic Event (T-OAE) is generally well documented in epicontinental basins; however, the duration of anoxia and recovery remains poorly constrained in the Tethys Ocean owing to limited stratigraphic resolution of oceanic sections with hiatuses. In this paper, we describe a relatively continuous...

Outcrops of a thick turbiditic succession are exposed on the northern bank of the Liptovská Mara reservoir near Liptovská Ondrašová and Ráztoky. The section consists of rhythmic, predominantly thin- to medium-bedded turbidites of the Rupelian age. Their biostratigraphy is based on the calcareous nannofossils. Facies associations of these deposits r...

Well exposed, poorly bioturbated turbiditic sandstones of the Kýčera Beds (Zlín Formation; Eocene) in the Bieščary Quarry contain the deep-sea Nereites ichnofacies. The trace fossils Ophiomorpha rudis, Halopoa annulata and Scolicia strozzii are mainly common in thick-bedded sandstone packages. They represent the Ophiomorpha rudis ichnosubfacies. Pa...

Sand spherules from Eocene shallow-marine deposits are identified as crab (Brachyura) feeding pellets. Several points support this interpretation: (i) microscopic study of these structures shows the absence of fine-grained matrix; (ii) spatial distribution within shallow water deposits (foreshore to upper shoreface) is interpreted on the basis of w...

Numerous trace fossils are described from the Late Miocene sediments of the Bzenec Formation exposed at the Gbely section (the Vienna Basin, Slovakia). During deposition of the sediments the area was part of the large, long-lived brackish to freshwater Lake Pannon. Most of the trace fossils are attributed herein to Egbellichnus jordidegiberti igen...

Terminal Triassic environmental changes are characterized by an integrated study of lithology, litho- and cyclostratigraphy, paleontology, mineralogy, geochemistry and rock magnetism in the Tatra Mts. The Carpathian Keuper sequence was deposited in an arid environment with only seasonal rivers, temporal lakes and swamps with scarce vegetation. Comb...

The base of Lower Cretaceous sequence in the Manín Unit is erosive but without signs of subaerial emersion. Submarine erosion was triggered by bottom denivelization during Late Berriasian extension of the area. Sedimentation of planktogenic hemipelagic limestones started during latest Berriasian/earliest Valanginian and continued until Aptian.The p...

Diplocraterion parallelum Torell, 1870, represents a significant element of the Lower Triassic ichnofossil associations in the Western Carpathians from the viewpoint of ichnofacies and stratigraphy. These assemblages of trace fossils commonly include D. parallelum, Arenicolites, Skolithos and a few of other trace fossils that rarely occur in isolat...