DescriptionCretaceousConcretion.jpg English: Concretion from the Cretaceous of western South Dakota. Date June 2008 Source Own work Author Wilson44691...
DescriptionConcretion in the Dakota Sandstone (Lower Cretaceous) (Dinosaur Ridge, Colorado, USA).jpg English: Concretion in structurally tilted Dakota...
to en.wikipedia. 2009-12-19 04:28 Jstuby 3072×2048 (4362052 bytes) [[Concretion]] within the [[Point Loma Formation]], Sunset Cliffs, [[Point Loma]],...
DescriptionA new azhdarchoid pterosaur from the Lower Cretaceous of Brazil and the paleobiogeography of the Tapejaridae.pdf English: The Tapejaridae were...
College of Wooster). [1] archive copy at the Wayback Machine English Late Cretaceous Pierre shale, near Ekalaka, Montana Wikimedia username: Wilson44691 URL:...
of this work, hereby publish it under the following license: English Concretion and ammonite cast from the Juana Lopez Member Wikimedia username: Kent...
com/photos/jsjgeology/52654781363/ operator: Flickr URL: https://live.staticflickr.com/65535/52654781363_3376bf9b22_o.jpg determination method: SHA-1...
com/photos/jsjgeology/52654782868/ operator: Flickr URL: https://live.staticflickr.com/65535/52654782868_c3aeb5cd28_o.jpg determination method: SHA-1...
Attribution-Share Alike 4.0 truetrue English Frontier Formation with concretions Wikimedia username: Carpenter, Kenneth author name string: Carpenter...
DescriptionSeptarian concretion (Pierre Shale, Upper Cretaceous; Great Plains, USA).jpg English: Septarian concretion from the Cretaceous of the American Great...
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