II 11 TI 11 m.n TT YC.. C A D IL FL TT TT TO. A Bror (E.IT TIT Tr n IT TI my T JY TT TYYT G Draw X's along unconformities. Determine an approximate age for siltstone C. History (oldest event to youngest event): Rock Descriptions: A B с D E F G H I J K L shale; mud cracks limestone; Cretaceous fossils siltstone; ripple marks gabbro; radiometric age of 50 Ma limestone; Permian fossils siltstone; ripple marks sandstone conglomerate sandstone shale; marine fossils sandstone granodiorite; radiometric age 400 Ma

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