A porous silica rock ("tripoli") in the footwall of the Jurassic Úrkút manganese deposit, Hungary: composition, and origin through carbonate dissolution - Polgari, Marta; Szabo, Zoltan; Szabo-Drubina, Magda; Hein, James; Yeh, Hsueh-Wen (Sedimentary Geology, 2005)