Rocky bed with a prasopora colony (fossil) on the shore of Grondines, 1975

Source: Clark, T.H. and Y. Globensky. 1975. Grondines area. Geological Report 154. Ministry of Natural Resources. Direction générale des mines. Service de l’exploration géologique. Québec: Éditeur officiel du Québec, p.84.
The rocky soil of Grondines carefully preserves another hidden treasure: fossils.