Pseudomorphs after more tabular or blocky azurite crystals also occur
No doubt this is a piece worthy of study
marine (14)
The majority (2/3) of the stones are composed of a light-colored lithology with a typical chondritic texture
Meteoritical Bulletin: MB 36 (1966) Iron
30739 - Partial Prepared 2.33 Inch Dicranurus monstrosus Lower Devonian Trilobite Calymene Pseudomorphs after more tabular orDicranurus sp. Conrad 1841 (trilobite) Trilobita Lichida Odontopleuridae Parent taxon: Odontopleuridae according to H. B. Whittington 1956 See also Jell and Adrain 2002 and Sepkoski 2002 Sister taxa: Acidaspidinae, Apianurinae, Borkopleura, Ceratocephalinae, Ceratonurus, Chlustinia, Dudleyaspis, Eoleonaspis, Exallaspis, Gaotania, Hispaniaspis, Isoprusia, Ivanopleura, Koneprusia, Koneprusiinae, Laethoprusia, Meadowtownella, Miraspidinae,