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A new o utcro p of the Pira bas Formation was fou nd in th e right bank of the igar ape Marcian o, 3.5 km so uth of Ca cte, county of Pinh eiro cia Cruz. Ficld o bservations a nd exa mina tion of the collected sa mples lead t he a uthors to desc ribe a new geo logic sett ing of the for m a tion, insid e th e Barr eirinh as basin . M oreover , the fossil content includes specimens of genus Orthaula x, a ga stro pod cons idered as a good ind ex-fossil lo r a great nu m ber of Lower Mi ocene fo rmdoi:10.25249/0375-7536.19736067 fatcat:xb7rnslzrnfdrmjxarkmmzc7j4