ABSTRACT: The I Joe-Kulp area comprises FYë-Permian basement and rormian niotamor|»hiTerttary se^mentary and ignamis rock^. The Permiaıı rast with an angular imeonflarmity em the Pre-Permian nietamorphics (basement rocks), The basement rocks have been metamorphosşcl at least twice am! as a whole the area haa undergone polyphase deformation« During the first episode of deformation, which Is older than the Permian, a distinct élevage structure In the basement rooks was developed and at the same Mme an amphlbollte fades metatnorphfsm occurred. Folds plunging evidently NW and NE respectively are observed in the basement metamorphlcs and Miocene (Tertiary) segmente. These folds were presumably formed as a result of two distinct deformation phases(D^ ani &3 ) and thus during Post=»flocene periods auiilorni and synform In the ba«emeat rooks, and an tie I ine and synoMne structures 1m the Miocene sediments were developed. Later a second episode of metamorphÉMn (greenschlst faeies niotamorpliism) and faulting) to»k plam and beeauëe of ttilfe low grade nietamorphism the basement rocks were extensively