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I'm concerned that the deletion rationale you proposed isn't based on policy or guidelines. That something isn't widely adopted doesn't mean that it's not notable. I've found it difficult to search for sources for this topic as there appears to be another meaning of the term Chaotian in geology (a specific geological feature in China). Can you please expand the deletion rationale with references to the WP:N guidelines which this fails, and an explanation of your WP:BEFORE actions, explaining why this deletion would be uncontroversial? Thanks! pburka (talk) 22:42, 30 July 2020 (UTC)[reply]
Hello @Pburka:, thanks for raising this with me. Still new to editing Wikipedia, had read WP:N and WP:BEFORE but may have misinterpreted this. Upon further consideration I have decided to revise my position on deletion of this page. My initial view was on WP:SIGCOV as on the geological side there are only two sources that I know of/am able to find [Van Kranendonk et al. 2012] and [Ogg et al. 2016] (which is mostly a concise version of Van Kranendonk et al. 2012). Under this (same for Zirconian) I believe it fails the WP:SIGCOV as only two (really one) sources cover this issue as part of a Precambrian revision (which should probably be expanded in Geologic time scale#Proposed Precambrian timeline).
However, on further reading of [Goldblatt et al. 2010] I've realised that a second proposal was made to denote the time from initiation of planetary accretion in the solar system to the final amalgamation of Earth. As there are two independent sources I believe this is categorised as notable under the guidelines WP:N.
It's not an area I'm very familiar with, so you may well be right, but I found the argument initially presented insufficiently clear-cut for PROD. Wikipedia has three different deletion procedures: WP:SPEEDY for unambiguously unencyclopedic content, WP:AFD for community deletion discussions, and WP:PROD for articles which editors are convinced would be uncontroversial if brought to AFD. I'd recommend spending some time in AFD before using PROD. pburka (talk) 14:05, 31 July 2020 (UTC)[reply]
