Terrestrial impact structures as geoheritage: an assessment method of their scientific value and its application to Brazil

Abstract

Terrestrial impact structures are geological and geomorphological features with particular importance to understand the history and evolution of the planet. Impact structures are scattered around the world but in many countries these features are under threat, essentially due to anthropic factors. Impact structures with higher scientific value should be considered as geological heritage and, consequently, be subjected to geoconservation strategies. In order to select the most important impact structures to be properly conserved and managed, this paper proposes a quantitative assessment method of the scientific value of these structures. The eight Brazilian impact structures were used to test this method that has the potential to be applied to any geological context in any country. The structures known as Araguainha Dome-MT and Serra da Cangalha-TO reached a higher scientific value, which justifies the need to develop geoconservation strategies and a proper management.

Principles for Developing a National Soil Heritage Inventory

“…Soils, like other elements of geodiversity, have certain specificities that require an adaptation of the criteria that are usually used in the inventory of geological heritage. Other authors have followed this procedure, such as the proposals for inventories of impact craters (Sánchez and Brilha 2017), geomorphological features (Pereira et al 2007), or fossils (Henriques and Pena dos Reis 2015).…”