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ThereisahugeandimportantmeridinntectoniczonelnHebci-Shandong-AnhuiProvinces(castcrnNorthChina),especlallytbcoldstructuresfromnorthtosouth.Becauseitsmainpartishiddenunder-neath,andtheoutcroppingsweredisplacedandreformed.thetectoniczonecannotbenoticedforalo