Fig. 1: Generalized maps of the US sector of the western North American Cordillera and palinspastic reconstruction of the Southern California Batholith.
From: Magmatic surge requires two-stage model for the Laramide orogeny
a Map of western North American Cordillera showing the current distribution of the Mesozoic and present-day magmatic arc, Sevier fold-thrust belt, Laramide foreland belt, and hinterland (after42). The distribution of the anatectic granite belt is after Chapman et al.32. b Late Cretaceous (ca. 90–70 Ma) tectonic reconstruction of the Cordilleran arc in Southern California (after48). The Southern California Batholith (SCB) lies between the northern Peninsular Ranges Batholith and southern Sierra Nevada Batholith. This study focuses on the Late Cretaceous (90–70 Ma) plutonic flare-up in the SCB (yellow rocks), particularly those in the coastal arc in the Transverse Ranges and their relationship to flat-slab subduction models. Our data come from all major structural blocks in the Transverse Ranges (see abbreviations on map). SAF San Andreas fault, SGF San Gabriel fault, LSB Little San Bernardino Mountains, SB San Bernardino Mountains, MP Pine Mountain block, SG San Gabriel Mountains, CM Cucamonga block, AFM Alamo-Frasier Mountain block.
