▁than ▁the ▁thermal ▁peak ▁of ▁met am orphism . ▁It ▁was ▁also ▁shown ▁that ▁mag m atic ▁under pl ating ▁during ▁a ▁time ▁period ▁of ▁about ▁thirty ▁million ▁years ▁was ▁strong ▁enough ▁to ▁er ase ▁all ▁t ect ono – met am orph ic ▁history ▁in ▁the ▁I vera ▁Verb ano ▁Zone . ▁This ▁information ▁was ▁preserved ▁in ▁the ▁Str ona - C ener i ▁Zone ▁because ▁areas ▁in ▁the ▁upper ▁cr ust ▁were ▁not ▁affected ▁nearly ▁as ▁much . ▁Other ▁research ▁has ▁been ▁conducted ▁in ▁the ▁K utch ▁District ▁of ▁North west ▁India . ▁It ▁was ▁concluded ▁that ▁the ▁u pl ift ▁that ▁occurred ▁in ▁the ▁area ▁was ▁due ▁to ▁intr us ions ▁of ▁mag ma ▁in ▁the ▁lower ▁part ▁of ▁the ▁cr ust . ▁This ▁u pl ift ▁occurred ▁because ▁of ▁two ▁separate ▁processes . ▁One ▁of ▁these ▁processes ▁is ▁due ▁to ▁mag m atic ▁under pl ating , ▁while ▁the ▁other ▁involves ▁only ▁is ost asy . ▁Research ▁has ▁shown ▁that ▁during ▁the ▁Oxford ian ▁Stage ▁a ▁peak ▁trans gress ive ▁event ▁occurred ▁which ▁was ▁followed ▁by ▁the ▁de position ▁of ▁sh ale ▁and ▁sand stone . ▁It ▁is ▁possible ▁that ▁the ▁lower ▁units ▁may ▁represent ▁a ▁decrease ▁in ▁sea ▁level ; ▁the ▁sea ▁began ▁to ▁withdraw ▁because ▁of ▁the ▁u pl ift ▁related ▁to ▁the ▁mag m atic ▁under pl ating . ▁ ▁Under pl ating ▁Under pl ating ▁is ▁the ▁accum ulation ▁of ▁partial ▁mel ts ▁at ▁the ▁base ▁of ▁the ▁cr ust ▁where ▁an ▁ocean ▁plate ▁is