Факультет біології, географії та екології
Permanent URI for this collectionhttps://ekhsuir.kspu.edu/handle/123456789/67
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Item NEW HOLOCENE ICHTHYO-FOSSIL ASSEMBLAGE FROM EXTRUDED LAGOONAL OUTCROPS, CURONIAN SPIT, LITHUANIA(2023) Buynevich, I. V.; Pupienis, D.; Bitinas, A.; Davydov, O. V.; Damušytė, A.; Dambrauskienė, K.; Давидов, О. В.Fish remains (ichthyo-fossil assemblages) offer important information about past ecosystems and serve as taphonomic indicators of sedimentation and burial history. In recent years, several sets of fish remains have been collected from lagoonal mark outcrops exposed along the shores of the Curonian Lagoon, Lithuania. Unfortunately, due to ongoing erosion, most of the fossiliferous deposits have disappeared in recent years. Here we present new finds of three separate fish bone accumulations from a previously unsampled outcrop. Based on previous data, these (bream-like) fish are likely mid-Holocene in age and have been buried in a thanatocoenosis, as reflected by the grouping and delicate nature of the fossils, especially the scales.Item SPATIAL AND TEMPORAL VARIATIONS IN MAGNETIC SUSCEPTIBILITY OF COASTAL SANDS RESULTING FROM RECENT STORM ACTIVITY, SAAREMAA ISLAND, ESTONIA(2023) Buynevich, I. V.; Tõnisson, H.; Kont, A.; Palginõmm, V.; Suursaar, Ü.; Rosentau, A.; Hang, T.; Pupienis, D.; Davydov, O. V.; Давидов, О. В.Coastal strandplains on Saaremaa Island, Estonia, contain a rich archive of past events, which are recorded as geomorphic and lithological indicators of reworking (erosional) and depositional (accretionary) phases. This study presents a new dataset of low-field bulk magnetic susceptibility (MS) values from coastal sands as a rapid means of characterizing the ferrimagnetic and paramagnetic fraction in morphosedimentary units related to cyclone Gudrun (January 2005). Combining spatial and temporal patterns in MS (e.g., >600 SI for most peaks) with granulometric and geophysical databases provides the basis for applying similar integrated approach to reconstructing past extreme coastal events.Item LONGSHORE SUBSURFACE ANOMALIES CONSISTENT WITH MID-HOLOCENE CHANNELIZED STORM EROSION: TIHU STRANDPLAIN, HIIUMAA ISLAND, ESTONIA(2023) Buynevich, I. V.; Tõnisson, H.; Kont, A.; Suursaar, Ü.; Rosentau, A.; Hang, T.; Suuroja, S.; Davydov, O. V.; Давидов, О. В.Item CROSS-SECTIONAL MORPHOMETRY AND GEORADAR SIGNATURE OF SMALL NON-TIDAL INLET (PRORVA) CHANNELS, BLACK SEA, UKRAINE(2023) Buynevich, I. V.; Davydov, O. V.; Давидов, О. В.This study is the first comparison of a buried channel structure imaged with georadar and an active inlet (prorva) along the non-tidal Black Sea coast of Ukraine. A paleo-channel along the liman coast exhibits easterly dipping bounding surfaces (clinoforms) interpreted as a spit platform and culminates in a cut-and-fill structure (width ~5 m; depth ~1 m). An active channel with similar cross-sectional morphometry and dimensions is represented by Lazurnenska prorva along Kinburn peninsula. This comparative effort has implications to finding other buried channels along the barrier coasts and demonstrates the potential geological legacy of modern channels.Item GENETIC DIVERSITY OF INLET SYSTEMS ALONG NON-TIDAL COASTS: EXAMPLES FROM THE BLACK SEA AND SEA OF AZOV (UKRAINE)(2022) Davydov, O. V.; Karaliūnas, V.; Давидов, О. В.In the coastal zone of the oceans, coastal barriers are quite widespread. Within their limits, inlets periodically arise and exist for a certain time, which is of great geological, hydrological, ecological, and navigational significance. Along the coasts where tidal fluctuations predominate, tidal inlets stand out, which are quite well studied in terms of genesis, morpho-, hydro- and litho-dynamics. Inland, semi-isolated marine basins, where tidal fluctuations do not reach a significant amplitude, are called non-tidal seas. Within the coastal barriers of non-tidal seas, channels periodically arise and develop, which are called breaches or prorvas. Breaches are quite often mentioned in the specialized literature along the coasts of non-tidal seas, but they have not been purposefully studied. In this article, we tried to analyze the conditions for the formation of prorvas within non-tidal seas based on many years of research. We have identified four hydrodynamic situations in which breaches are formed. The presented variety of situations allows us to identify and describe four genetic types of prorvas: storm-generated, storm-surge-generated, wind-stress-generated, and river-stress (fluvially induced). The presented article is the first attempt to analyze the genetic characteristics of the breaches.