Enigmatic concretions (‘kerkoubs’) in the Gara Sbaa Formation. A In cross-stratified sandstones at Gara Sbaa B In flow direction near Boumerade C With linear sedimentary structures at Gara Sbaa D With great size variation at Gara Sbaa E In tabular cross-bedding at Gara Sbaa F In high density.

  Part of: Ibrahim N, Sereno PC, Varricchio DJ, Martill DM, Dutheil DB, Unwin DM, Baidder L, Larsson HCE, Zouhri S, Kaoukaya A (2020) Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys 928: 1-216. https://doi.org/10.3897/zookeys.928.47517