Patch reefs facies in the Picún Leufú Formation (Jurassic/Cretaceous boundary) in the Zapala region, Neuquén Basin, Argentina
In the locality of Cerrito Caracoles, situated in the nearby of Zapala city, in the western central region of the Neuquén province, Argentina, the basal part of the Picún Leufú Formation (Jurassic/Cretaceous boundary) crops out. The facies and microfacies association analysis points out to an inner...
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| Autores principales: | , , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15145158_v_n1_p63_Armella |
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| Sumario: | In the locality of Cerrito Caracoles, situated in the nearby of Zapala city, in the western central region of the Neuquén province, Argentina, the basal part of the Picún Leufú Formation (Jurassic/Cretaceous boundary) crops out. The facies and microfacies association analysis points out to an inner shelf margin environment, with development of well preserved patch reefs. The description of these bodies (coral and algae bafflestone, bryozoan bafflestone and algal boundstone), and of a low relief mound reef (skeletal algal packstone) are presented in this paper. The associated facies are represented by low energy deposits (mudstone), bar complexes (sandy skeletal packstone and skeletal packstone) and channels (skeletal intraclast floatstone and intraclast skeletal ooidal floatstone). |
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