chalk: References & Edit History
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Add new Web site: Polish Geological Institute National Research Institute - Chalk. | Feb 01, 2025 | ||
| Add new Web site: National Center for Biotechnology Information - PubMed Central - The effect of climbing chalk powder on the infectivity of human coronavirus OC43. | Aug 10, 2024 | ||
| Add new Web site: The Clay Minerals Society - Porosity Evolution in the Chalk: An Example from the Chalk-Type Source Rock of the Outer Carpathians (Poland). | Jun 13, 2024 | ||
| Add new Web site: Geology.com - Chalk: A biological limestone formed from shell debris. | Sep 25, 2023 | ||
| Add new Web site: How Stuff Works - Science - Chalk. | Dec 02, 2012 | ||
| Updated geologic time data. | May 25, 2010 | ||
| Added new Web site: How Stuff Works - Healthguide - Chalk Poisoning. | Sep 25, 2008 | ||
| Added new Web site: Geology Shop - Chalk. | Aug 21, 2007 | ||
| Article added to new online database. | Jul 20, 1998 |
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