▁of ▁the ▁structure ▁▁ ▁Ob lique ▁fol iation ▁is ▁mainly ▁encountered ▁in ▁she ar ▁zones , ▁where ▁it ▁forms ▁as ▁a ▁result ▁of ▁the ▁she aring ▁de form ations ▁within ▁the ▁affected ▁zone . ▁As ▁the ▁name ▁implies , ▁this ▁fol iation / fab ric ▁takes ▁on ▁an ▁ob lique ▁attitude ▁to ▁the ▁she ar - zone ▁boundary ▁( i . e . ▁the ▁fabric ▁attract or ) ▁and ▁internal ▁layer ing , ▁usually ▁an ▁angle ▁of ▁about ▁ 2 0 ° – 4 0 ° , ▁or ▁less . ▁( In ▁some ▁she ar ▁zones , ▁even ▁angles ▁less ▁than ▁ 5 ° ▁are ▁reported , ▁yet ▁angles ▁ste eper ▁than ▁ 4 5 ° ▁are ▁also ▁known ). ▁A ▁closer ▁look ▁reve als ▁that ▁the ▁fol iation / fab ric ▁is ▁created ▁by ▁the ▁parallel ▁arrangement ▁of ▁a ▁mult itude ▁of ▁similar ▁orient ed ▁small ▁gra ins , ▁which ▁are ▁ ▁slightly ▁el ong ated ▁in ▁the ▁fol iation ▁direction . ▁Ob lique ▁fol iation ▁thus ▁represents ▁primarily ▁a ▁shape - pre ferred ▁orientation ▁( SP O ). ▁▁ ▁In ▁their ▁geomet rical ▁arrangement , ▁ob lique ▁fol i ations ▁are ▁somewhat ▁similar ▁to ▁( type ▁I ) ▁S - C - fab ric , ▁in ▁which ▁the ▁el ong ated ▁gra in ▁fabric ▁becomes ▁a ▁true ▁sch ist os ity / fol iation . ▁Occ asion ally ▁m ica ▁fish ▁get ▁incorpor ated ▁into ▁ob lique ▁fol i ations ; ▁this ▁structure ▁has ▁been ▁called ▁type ▁II ▁S - C