“…In the marginal zones, low-grade metamorphic rocks commonly have a steep-dipping foliation, whereas high-grade rocks near the core of the dome commonly display a shallow-dipping foliation. The tectonic models evoked for dome development fall into four * Author for correspondence: mezger@uni-mainz.de broader categories: (1) compression, which includes the diapirism (Ramberg, 1980;Soula, 1982) and transpression (Carreras & Capella, 1994;Gleizes, Leblanc & Bouchez, 1997) models; (2) extension, which comprises models of crustal thinning in an extensional setting, known as metamorphic core complexes (Lister & Davis, 1989;Malavielle et al 1990;Oliver, 1994;Hetzel et al 1995;Dirks, Zhang & Passchier, 1997) and coupled crustal thinning and diapirism (Teyssier & Whitney, 2002); (3) a combination of compression followed by extension or doming (Zwart, 1986;Gibson, 1989Gibson, , 1991Aerden, 1994Aerden, , 1998; and (4) interference of polyphase intrusions with large-scale folds and flat-lying shear zones (Passchier, 1994;Myers, 1995;Zegers et al 1998). Eeckhout & Zwart (1988) and Gleizes, Leblanc & Bouchez (1997).…”