Established and Proposed Geosites of Visean (Carboniferous) Plants from the Moscow Basin

Fossil plant localities are potential geosites, but related information is limited for some paleofloristic domains. Four geosites representing Visean (Mississippian, Carboniferous) plant-bearing deposits are reported from two areas of the Moscow Basin (central eastern Laurussia). These are the Mountainous Msta area in the northwestern segment of this basin and the Tula Region in its southern segment. The localities were examined in the field and characterized with criteria related to geoheritage properties (e.g., geoheritage types, physical view, accessibility, vulnerability, and research importance). One of these localities has already been established as a geosite (official status of protected area) and three other localities are proposed as geosites in this work (two of them are situated in the planned protected area). It is established that all considered geosites represent notable assemblages of Visean plants, with some exhibiting unique preservation and interesting sedimentary features, such as the “Tula pipes”. Essentially, the localities are small natural outcrops and abandoned quarries with perfect accessibility. They have potential for future research projects, as well as for geological education and tourism. Presently, their vulnerability is only potential, but it can increase due to touristic exploitation in the nearest future; thus, this property requires special attention. More generally, these geosites are important sources of the knowledge of the Early Carboniferous equatorial vegetation in eastern Laurussia.