Middle Cretaceous Sequence Stratigraphy at the Ashaka Cement Quarry …
3. Middle Cretaceous Sequence Stratigraphy at the Ashaka Cement Quarry in Gongola Basin of … DOI: 10.9790/0990-03215967 61 | Page Kanawa Member is only about 4 m thick made up of dominantly limestone beds but ammonites occurring there demonstrate at least the Paravascoceras cauvini to Pseudotissotia nigeriensis zones …
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