1988  Glenister & Furnish: 60. Honguer Ola Limestone, site:
42°18' N, 109°48' E in the Jisu Honguer Syncline of southern
Mongolia. Site of the brachiopod fauna monographed by
Grabau,1931. Grabau suggested close relationship to the Middle
Productus Limestone (Wargal Lmst.); Ruzhentsev assigned it to the
Kazanian, approximately correlative of the Capitanian Stage.