Dear Schaefer and Hermann and all Thanks Schaefer and Hermann for your reply. Let me clarify a bit more before any more mails concerning Type-3 interference pattern comes in. I have already interpreted the structure as a "Type-3 pattern" in my thesis. what I will be interested in is a good name/analogue name for the structure. I mean a resemblance of the structure with any natural object or naturally occurring pattern. If you examine the structure a bit closely you may see that if the D2 fold movement forces a westerly major closures then there is inversion of stratigraphy at the second westernmost and second innermost levels. where a level is equivalent to a major westerly/easterly D2 closure (Fig. gms3b-sdd.bmp). However if easterly major closures accrue due to D2 fold movement then 1st, 3rd and fifth levels show inverted stratigraphy whereas the 2nd and 4th levels show reinverted stratigraphy (Fig. gms3a-sdd.bmp). Any suggestions and questions are welcome. Best wishes and regards Manas *********************************************** Manas Ranjan Sahoo Dept. of Geology and Geophysics Indian Institute of Technology KHARAGPUR INDIA 721 302 Phone no: 91-3222-83356 (Dept.) E-mail: [log in to unmask] [log in to unmask] ************************************************