Behavioural palaeobiology and taphonomy of the Late Jurassic calcareous sponge Elasmostoma fomes W. Müller, 1984
Journal Title: Volumina Jurassica - Year 2005, Vol 3, Issue 1
Abstract
Calcareous sponges Elastostoma fomes W. Müller, 1984, from the Lower Kimmeridgian marly onkoliticlimestones exposed at Karsy in the Holy Cross Mountains, Central Poland, are studied in terms of their settlement, growth, behaviour, and resulting phenotypy. The lichen-shaped auriculate specimens are interpreted as growing upwardly, at a higher angle to the bottom surface, in order to involve passive flow carrying suspended nutrients up on which they fed. Unstable bottom and hydrodynamic conditions, under which the growth of sponges progressed, were basic prerequisites that controlled ecophenotypic variability of the studied specimens. A peculiar case of regeneration is discussed, to postulate the skeleton parts having been lithified during the sponge's life, and healed after an accidental injury. Aviolent event that caused catastrophic burial of the studied sponge assemblage is ascribed to high-energy agents, most likely of storm origin.
Authors and Affiliations
Andrzej RADWAŃSKI
The stratigraphy and palaeogeographic position of the Jurassic successions of the Priborzhavske-Perechin Zone in the Pieniny Klippen Belt of the Transcarpathian Ukraine
The Jurassic deposits which crop out in the quarries at Priborzhavske, Perechin and Novoselitsa in the Transcarpathian Ukraine comprise fairly similar successions, allowing their interpretation as corresponding to a sing...
Age of Lower Jurassic Springdale Sandstone of southwestern Utah from its Magnetic Polarity Sequence
The Springdale Sandstone records a large number of reversals of the geomagnetic field. Forty-three percent of the 60 m section investigated showed 25 polarity intervals. These frequent reversals follow the nearly constan...
PROMOCJA JEDNOSTEK SAMORZĄDU TERYTORIALNEGO NA PRZYKŁADZIE MIASTA RACIBÓRZ
MEDIA EDUCATION AS A SOCIOCULTURAL CAPITAL ON THE BIDDER AND THE CONSUMER MARKET
Pozycja paleogeograficzna osadów górnej jury pienińskiego pasa skałkowego: nowe dane paleomagnetyczne z obszaru Polski i Słowacji