Interest in geoconservation has been growing since the 1990s and, therefore, several actions have been taken to integrate geoheritage in scientific research, public policies and nature conservation. In this context, the International Union for Conservation of Nature (IUCN) has included many initiatives to integrate geodiversity and geoheritage in a broader nature concept in its agenda. In Brazil, the protected areas follow IUCN's guidelines. Thus, this study aimed to map the distribution of geoconservation research in Brazilian National Parks and to discuss the criteria and procedures applied in the inventory of geological sites in the Itatiaia National Park that can be adapted to other Brazilian protected areas. The applied methods were carried out based on the literature review, geoprocessing techniques and application of criteria and parameters to ensure the proper assessment of geological sites. The results show that geoconservation research in national parks has been growing over the years, and the geosites located in them may compound a potential list to be included in the Brazilian geoheritage inventory. Furthermore, the application of pre-established criteria in the selection of geological sites made the qualitative process more transparent, and the identification of additional values showed to be a useful tool to help park managers to integrate geological sites in the management process. Therefore, the criteria and parameters applied in this paper may be replicated in existing Brazilian National Parks and should be considered when assessing potential areas for establishing new protected areas.