Usage History of 'psammite'

The following chart shows how frequently 'psammite' appeared in printed materials over time. For example, the word 'psammite' occurred 2 times in books in 1712 and 81 times in 2008. From 1712 to 2008, the word 'psammite' was used a total of 10,362 times in books scanned by Google. See Reference: Google Ngram project.

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