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Catalog and database on the Earth impact structures *
Comp. Center, Math. Model. in Geoph
gin is still needed to be confirmed. For any structure, the degree of confidence in the impact origin is reflected by its validity index V , that can adopt the following values: 4 (confirmed), 3 (probable), 2 (possible), 1 (suspected) and 0 (rejected). The latter relates to the structures, whose once proposed impact origin was later disproved by additional studies. Classification of structures over the validity index is based on some sort of expert judgment and reflects the availability offatcat:sr7kuovkingn5iqe2sqxkmfttm