Temat: Lagerstatte - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Polskie Solnhofen
Polish Solnhofen
Autorzy:: Kin, A.
Błażejowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/2074952.pdf
Data publikacji:: 2012
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Fossil-Lagerstätte
tachonomia
paleośrodowisko
paleogeografia
jura późna
Polska
Fossil-Lagerstatte
taphonomy
palaeoenvironment
palaeogeography
Late Jurassic
Opis:: We briefly report on recent discovery of a new Fossil-Lagerstätte at Owadów-Brzezinki quarry (central Poland), where Upper Jurassic (Upper Tithonian = Middle Volgian) shallow water carbonates are exposed. Th section includes a richly fossiliferous horizon of lithographic-type limestones, formed in a lagoonal depositional environment. Numerous organic and phosphatic remains of wide range of both marine and terrestrial creatures, including horseshoe crabs and decapods, disarticulated fish skeletons, remains of marine reptiles, ammonites, dragonflies, beetles, and rare isolated pterosaur bones and teeth, were found in association with an extremely abundant small bivalves Corbulomima obscura. The richly fossiliferous horizon at Owadów-Brzezinki is stratigraphically closely related to one of the world's most famous Fossil-Lagerstätte sites – Solnhofen (Bavaria, south-central Germany).
Źródło:: Przegląd Geologiczny; 2012, 60, 7; 375-379
0033-2151
Pojawia się w:: Przegląd Geologiczny
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Konzentrat-Lagerstätte-type carbonate concretions from the uppermost Bajocian (Middle Jurassic) of the Częstochowa area, South-Cental Poland
Autorzy:: Zatoń, M.
Marynowski, L.
Powiązania:: https://bibliotekanauki.pl/articles/2058808.pdf
Data publikacji:: 2004
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Jurassic
Bajocjan
carbonate concretions
taphonomy
Lagerstätte
biomarkers
Opis:: Early-diagenetic calcitic concretions of latest Bajocian (parkinsoni Zone, bomfordi Subzone) age in the Polish Jura contain an extremely rich and well-preserved macrofauna. In addition to bivalves and brachiopods, there are numerous ammonites of the (sub)genera Parkinsonia, Nannolytoceras, Lissoceras (Lissoceras), L. (Microlissoceras), as well as rare representatives of Vermisphinctes, Strigoceras (Strigoceras) and Phylloceras. Carapaces of primitive prosopid crabs are found associated. Such a diverse and well-preserved fauna (previously unknown from Bajocian epicratonic deposits of the Polish Jura), is typical of Konzentrat-Lagerstätte-type deposits. The random distribution of the concretions in exposure and the small size of the fauna may suggest that all remains were concentrated by bottom-current action in small depressions on an uneven sea-floor. The presence of numerous small-sized ammonites may be regarded as reflecting post-spawning assemblages which sufferedmass-mortality. Although cause of their death remains unclear, storm events are a possibility. Such depressions acted as natural “traps” as well as constituted a size-limiting factor for the accumulating fauna. The fact that all elements are well preserved indicates brief post-mortem transport and rapid burial, followed by early diagenesis that protected them from compaction. The absence of such fossil-rich concretions higher in the Middle Jurassic sequence clearly shows that our current assessment of biotic diversity may be an underestimate. The carbonate concretions contain a predominantly terrestrial type of organic matter (OM). Samples analysed are extremely immature, but early diagenetic transformations of OM occurred prior to concretion formation.
Źródło:: Geological Quarterly; 2004, 48, 4; 339--350
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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