title: Erratum to: Composition of weathering crusts on sandstones from natural outcrops and architectonic elements in an urban environment.
authors.affiliation: Department of Mineralogy, Petrography and Geochemistry, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059, Kraków, Poland, mmarszal@agh.edu.pl.
authors.forename: Mariola
authors.initials: M
authors.lastname: Marszałek
authors.forename: Zofia
authors.initials: Z
authors.lastname: Alexandrowicz
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Rzepa