is present as Calciumphosphate, where the latter may be present not only as the component of the local apatite, and related with the P2Os content changes. Although the mean P content of the manganese oxide ore deposits of Eplény and Úrkút is generally less than 1,00 %, being mostly hydroxy-carbonate-Apatite, with some samples more similar to Francolite, while on the Eplény manganese ore deposit is found Dahllite. There is a rhodochrosite ore, composed of laminated gray, green, brown, and black sections, and is associated with a diagenetic origin. Rhodochrosite concretions with fish and plant fossils are common on the strata, composed by Mn-bearing Calcite with traces of hydroxyl-apatite, kutnohorite, smectite, quartz, feldspar, barite, pyrite, and quartz-cristobalite. Mineralized sections do not contain fossils or traces of benthic fauna, and contain only rarely fish remnants, planktonic organisms as well as silicified, manganized, or coalified plant fragments. Celadonite and smectite, especially the first, had particular importance for understanding the genesis of the Úrkút manganese ore. Celadonite and nontronite indicate paleo-oxygen level variations in the environment. There are well-crystallised celadonite occurrences that was formed by primary precipitation, differing from the known celadonite occurrences in that it is not found in direct association with submarine basic volcanic rocks, although being any evidence for volcanic contribution to the local ore genesis. The Smectite is also found on the lower Pliensbachian Limestone. Nearly every Sample on Úrkút contains interstratified Illite/smectite. Local silica is related with the quartz crystallinity of the white tripoli, where based on the dissolution of the carbonate portion of the siliceous Isztimér Limestone Quartz was formed by low-temperature, diagenetic processes. Finally, there were found a series of rare earth elements on the ore, adsorption from sea water, but terrigenous source also displaying a positive Ce anomaly is involved. The Rn220 and Rn222 concentration in the Úrkút Manganese Formation is anomalously high, and it causes health risk for the attendants of the Úrkút Manganese Mine, which is considered to be related to active fossil Biomat (bacterial action) which leads local minerals to adsorb different atoms or ions, whether they are radiogenic or not. Paleoenvironment Black Shale is present worldwide in the lower Toarcian, linked to the anoxic events that took place, in Úrkút locally related with deposits of Manganese Ore. Being part of the Transdanubian Range, the Úrkút Manganese Ore was linked to the environmental evolution of the southern passive margin of the rifting Tethys