caa a22 4500 606149481 CHVBK 20210128100534.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00531-014-1108-4 doi (NATIONALLICENCE)springer-10.1007/s00531-014-1108-4 Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco [Elektronische Daten] [J. Álvaro, Hassan Ezzouhairi, Sébastien Clausen, M. Ribeiro, Rita Solá] The Cambrian Tamdroust and Bab n'Ali Volcanic Complexes represent two magmatic episodes developed in the latest Ediacaran-Cambrian Atlas Rift of Morocco. Their rifting pulses were accompanied by accumulation of volcanosedimentary edifices (dominated by effusive lava flows in the former and explosive acidic aprons in the latter) associated with active tilting and uplift. Sealing of their peneplaned horst-and-graben palaeotopographies led to the onset of distinct onlapping geometries and angular discordances capping eroded basements ranging from the Ediacaran Ouarzazate Supergroup to the Cambrian Asrir Formation. Previous interpretations of these discordances as pull-apart or compressive events are revised here and reinterpreted in an extensional (rifting) context associated with active volcanism. The record of erosive unconformities, stratigraphic gaps, condensed beds and onlapping patterns across the traditional "lower-middle Cambrian” (or Cambrian Series 2-3) transition of the Atlas Rift must be taken into consideration for global chronostratigraphic correlation based on their trilobite content. Springer-Verlag Berlin Heidelberg, 2014 Tholeiitic volcanism nationallicence Uplift nationallicence Angular discordance nationallicence Palaeorelief nationallicence Condensation nationallicence Gondwana nationallicence Álvaro J. Centro de Astrobiología (INTA/CSIC), Ctra. de Torrejón a Ajalvir km 4, 28850, Torrejón de Ardoz, Spain aut Ezzouhairi Hassan Département de Géologie, Université Chouaib Doukkali, 24000, El Jadida, Morocco aut Clausen Sébastien Département de Géosciences, Université de Lille I, 59655, Villeneuve d'Ascq, France aut Ribeiro M. Laboratório Nacional de Energia e Geologia (LNEG), Ap 7586-Alfragide, 2610-999, Amadora, Portugal aut Solá Rita Laboratório Nacional de Energia e Geologia (LNEG), Ap 7586-Alfragide, 2610-999, Amadora, Portugal aut International Journal of Earth Sciences Springer Berlin Heidelberg 104/3(2015-04-01), 753-773 1437-3254 104:3<753 2015 104 531 https://doi.org/10.1007/s00531-014-1108-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00531-014-1108-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Álvaro J. Centro de Astrobiología (INTA/CSIC), Ctra. de Torrejón a Ajalvir km 4, 28850, Torrejón de Ardoz, Spain aut NATIONALLICENCE 700 1- Ezzouhairi Hassan Département de Géologie, Université Chouaib Doukkali, 24000, El Jadida, Morocco aut NATIONALLICENCE 700 1- Clausen Sébastien Département de Géosciences, Université de Lille I, 59655, Villeneuve d'Ascq, France aut NATIONALLICENCE 700 1- Ribeiro M. Laboratório Nacional de Energia e Geologia (LNEG), Ap 7586-Alfragide, 2610-999, Amadora, Portugal aut NATIONALLICENCE 700 1- Solá Rita Laboratório Nacional de Energia e Geologia (LNEG), Ap 7586-Alfragide, 2610-999, Amadora, Portugal aut NATIONALLICENCE 773 0- International Journal of Earth Sciences Springer Berlin Heidelberg 104/3(2015-04-01), 753-773 1437-3254 104:3<753 2015 104 531