M 958 Specton clay.
分類 | Rocks: |
年代 | Mesozoic Cretaceous Lower Cretaceous: Gault: |
産地 | Specton, Yorkshire. |
文献 | Department of Science, Tokio-Daigaku, 1881: Cretaceous formation. Catalogue of Histrical Geology. Mesozoic., pp. 1–26. Department of Science, Tokio-Daigaku. |