S/S MINERALS AND ROCKS 2012

Roselite
 
Roselite is architectural building stone from the quarry Pakovo selo near Drniš. In nature it is a conglomerate clastic rock with different sections of limestone pebbles and karst embedded in a reddish texture, cement. Different fragments of limestone in whitish, light-brown to dark-gray, yellowish or quite reddish tones of wine red colours as well as the mass of cement of fire-red colour gave to roselite its name and properties of a distinctly decorative and colouristically indented architectural stone.
 
Calcium carbonate makes 96% of the chemical composition of roselite while the rest are admixtures of limonite, bauxite or components of other mineral compounds. The stone roselite is determined petrographically as a conglomerate from promina deposits in Middle and North Dalmatia. Promina deposits as a sequence of different, mostly clastic rocks developed by decomposition and wear of precedent geologically older sea sediments of Mesozoic and Cenozoic era. Eternal geologic processes and tectonic heaving followed by intensive erosions and disintegration of earlier land created a terrestrial, pebble mass which the energy of powerful river and the collision with eternally dynamic sea shore, sedimented into reddish sludge of an ancient littoral or wide river delta. The genesis and the promina layers sedimentation occurred in the geologic period of late Palaeogene, end of Eocene and in Oligocene, 35 to 25 million years ago.