Volcanic contribution to emergence of Central Panama in the Early Miocene.

ABSTRACT: Formation of the Panama Isthmus, that had global oceanographic and biotic effects in the Neogene, is generally associated with tectonic uplift during collision of the Panama volcanic arc with South America. However, new field, geochemical and geochronological data from the Culebra Cut of the Panama Canal suggest that volcanism also contributed to the Isthmus emergence in the Early Miocene. This volcanism is recorded in a newly-recognised Central Panama volcanic field that includes several phases of development. Early activity of this field along the Panama Canal was associated with proximal effusive to explosive felsic products during formation of subaerial stratovolcanoes and possible domes ca. 21 Ma. This was followed by a period of marine transgression ca. 21-18 Ma, with more distal vol

SUBMITTER: Buchs DM 

PROVIDER: S-EPMC6363779 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature