Geological Characteristics of the Neogene Volcanic Plugs in Inlıce (Konya) Area, Central Turkey

Abstract

Around İnlice village (WSW of Konya), numerous volcanic plugs crop out as steep-sided conical hills within Neogene lava dome covered partially by nuée ardente deposits. Nine circular to ellipsoidal plugs have determined with heights ranging from a few meters to >50 meters, and hence creates usually visible topographic landscapes. Plug-4, tallest one, has a joint system developed typically in NE direction, which was cut by faults formed in N-S direction. In spite of the intensive alteration, mineralogical and petrographical characteristics of the samples suggests that the plugs are composed of dacite-andesite. The samples have also mafic enclave and some disequilibrium structures such as sieve texture in plagioclase, and acicular apatites, suggesting magma mixing and mingling in their petrogenesis.