They knew that unlike sandstone, the basalt contains metals that react with CO2, forming carbonate minerals such as calcite- a process known as carbonation.
On the gates ceiling(central gate, Carmadino gate) there are basalt columns placed obliquely, which come probably from the early christian basilica of Limen.
But unlike basalt, the recipe for granite typically requires copious amounts of water- which happens on Earth when water-rich oceanic crust subducts below another plate.
Activities included collaborative research on basalt rock studies under a CSLF project initiated by USA and feasibility studies in oil fields for enhanced recovery and saline aquifers.
The first one is over 80 per cent sediment, the second is radiolarian ooze, the third is calcareous and calcareous clayey sediment, and the fourth geotechnical complex is made up of basaltic basement.
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