Sołtyków - unikalny zapis paleoekologiczny wczesnojurajskich utworów kontynentalnych

• Autorzy: Pieńkowski G.

Warianty tytułu

EN

Sołtyków, Poland – an unique palaeoecological record ot the Early Jurassic continental deposits

• Języki publikacji: PL

Abstrakty

EN

The Sołtyków exposure is an old, long time abandoned clay pit. This exposure became known as a classical outcrop of alluvial-lacustrine deposits. Floral remains point to the earliest Jurassic (Lias 1-2) age, and the sequence stratigraphic correlation allows to narrow its age range to the Early Hettangian (Planorbis biochronozone). Sołtyków exposure fits the avulsion-controlled (crevassing- anastomosing) fluvial sedimentation model, however, some features such as laterally-accreted bedding point also to presence of high-sinuosity/meandering streams. Relatively thick and individualised package of lacustrine deposits occurring in the Sołtyków outcrop points to some permanency of the lake/swamp area during deposition of the sediments visible in the outcrop. Palaeosols are both of Podzol and Histosol type. The plant fossils in the Sołtyków exposure are very abundant and well preserved. The list of plants includes Neocalamites, the matoniacean, osmundacean and other indeterminate ferns, as well as pteridosperms, benettitaleans and conifers. Non-marine trace fossils comprise Coprinisphaera, Scoyeniaand aquatic Mermia ichnofacies. Other fossils that occur in Sołtyko?w are represented by Unionidae freshwater bivalve assemblage, insect remains, fresh-water ostracodes and scales of palaeoniscid fish. The Sołtyków exposure is well known Early Jurassic tracksite with numerous dinosaur footprints, mainly left by theropods and sauropods, and early mammalian footprints. The dinosaur nesting ground was also described. Recently, the Sołtyków exposure has been declared a natural reserve. Nature conservation problems are discussed. Due to many unique finds in Sołtyków (the oldest known evidence of gregarious ethology of dinosaurs, the biggest known Early Jurassic theropod footprints, rich and well-preserved invertebrate ichnoforms and plant remains, this exposure should be enlisted on the UNESCO World Heritage List (in geological cathegory). Moreover, the idea of “Kamienna Valley” geopark, comprising Sołtyków and other valuable outcrops in the region, is introduced.

Słowa kluczowe

PL

wczesna jura; Polska; utwory kontynentalne; geopark; ochrona przyrody

EN

Early Jurassic; Poland; continental facies; vertebrate tracks; nature conservation; geopark

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Volumina Jurassica
• Rocznik: 2004
• Tom: Vol. 2, no. 1
• Strony: 1--16
• Opis fizyczny: Bibliogr. 30 poz.

Twórcy

autor

Pieńkowski G.

• Państwowy Instytut Geologiczny, ul. Rakowiecka 4, 00-975 Warszawa,

Bibliografia

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• Gierliński, G. 1991. New dinosau ichnotaxa from the Early ,Jurassic of the Holy Cross Mountains, Poland. Palaeogeography, Palaeoclimatology, Paloeoecology, 85: 137-148. 
• Gierliński , G. i Niedźwiedzki, G. 2002. Enigmatic dinosaur footprints from the Lower Jurassie of Poland. Geological Quaterly, 46: 467-472. 
• Gierliński, G. i Pieńkowski , G. 1999. Dinosaur track assemblages from the Hettangian of Poland. Geological Quaterly , 43, 3: 329-346. 
• Gierliński, G., Niedźwiedzki, G, i Pieńkowski, G. 2001. Gigantic footprint of therepod dinosaur' in the Early ,Jurassie of Poland. Acta Palaeontologica Polonica, 46: 441 -446, 
• Gierliński , G., Niedźwiedzki, G. i Pieńkowski , G. 2004. Tetrapod track assemblage in the Hettangina of Soltyków, Poland, and its paleoenvironmental background Ichnos 11,3-4 (w druku). 
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• Pieńkowski, G, 1985. Early Liassic trace fossils assemblagcs Irom lhe Holy Cross Mountains, Poland: their distribution in continental and marginal marine environments. W: Curran, H, A, (red.) , Biogenic structures: their use in interpreting depositional environments, Society of Economic Paleonlologist and Milleralogist, Special Publication, 35: 37-;'1. 
• Pieńkowski , G. 1991. Euslatieally-controlled sedimentalion in the Hettangian-Sinemurian (Early Liassic) of Poland and Sweden, Sedimentology, 38: 503-518.
• Pieńkowski, G. 1998. Dinosaur nesling ground from the Early .Jurassic fluvial deposits , Holy Cross Mountains (Poland), Geological Quarterly, 42 , 4: 461-476. 
• Pieńkowski, G. 1999. Dinosaur nesting ground from the Early Jurassic Ouvial deposits, Holy Cross Mountains (Poland) - reply and new evidence . Geologicol Quarterly, 43, 3: 379-382. 
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