Title: A comparison study of the petrology of fine-grained clastics in mid-Cenozoic age basin deposits, Pima and Cochise Counties, Arizona
Abstract: This study is a comparison of the petrology of the fine-grained elastics contained in the Pantano Formation, the Mineta Formation, the Rillito beds, the Helmet Fanglomerate, and the Tucson Basin sediments. Depositional and mineralogic characteristics have been compared, with emphasis on the clay and heavy mineral assemblages, to determine source rocks and possible correlations. The Mineta Formation at its two localities was probably deposited in the same basin. The Pantano Forma tion, derived primarily from Cretaceous rocks, may also have been connected to this basin. The type II and III Rillito beds were derived primarily from older formations within the Santa Catalina Mountains. On the contrary, the type I Rillito beds are similiar to the Mineta Formation at Mineta Ridge and may have had similiar source rocks. Al though previously believed to be equivalent, no correlation between the Helmet Fanglomerate and the Pantano Formation is observable.
Publication Year: 1986
Publication Date: 1986-01-01
Language: en
Type: article
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