black shale: References & Edit History
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Modified link of Web site: National Center for Biotechnology Information - PubMed Central - The origin of Cretaceous black shales: a change in the surface ocean ecosystem and its triggers. | Dec 05, 2018 | ||
| Add new Web site: Academia - Black Shale, Grey Shale, Fossils and Glaciers: Anatomy of the Upper Ordovician-Silurian Succession in the Tazzeka Massif of Eastern Morocco. | Jun 15, 2016 | ||
| Add new Web site: National Center for Biotechnology Information - PubMed Central - The origin of Cretaceous black shales: a change in the surface ocean ecosystem and its triggers. | Jun 15, 2016 | ||
| Article added to new online database. | Jul 20, 1998 |
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