The Eocene platform deposits in the Moroccan Ghomarides have been studied. These marine carbonate platforms\u00a0were located in the westernmost Tethys approximately 30\u00b0N and 0\u00b0\u201310\u00b0W during the Cuisian to Bartonian. The\u00a0study includes observations from fossiliferous assemblages (such as larger benthic foraminifera and colonial\u00a0corals), their palaeoenvironment aswell as rock texture and fabric. Eight microfacieswere identified that represent\u00a0different ramp environments in a \u2018distally-steepened carbonate ramp\u2019 type of platform. The studied deposits are\u00a0organised into a transgressive succession composed of three sedimentary cycles: lower Cuisian, middle Cuisian\u00a0and middle Lutetian to Bartonian. In the lower cycle, photic inner to mid ramp environments in mesotrophic conditions\u00a0were prevalent. In the second cycle, photic inner ramp (sea-grass) to mid ramp environments inmesotrophic\u00a0to oligotrophic conditions were observed. The upper cycle, which is more extensive and variable, represents\u00a0mesophotic mid ramp to aphotic slope environments and changes gradually from oligotrophic to eutrophic conditions.\u00a0During the Eocene, larger benthic foraminifera were dominant overtaking the zooxanthellate corals in the\u00a0Tethys regions. Nevertheless, our study and the performed comparison with other Tethyan sectors have revealed\u00a0that in some areas both coexisted in similar proportions. In some western Tethys regions close to the Atlantic\u00a0Ocean, coinciding with areas influenced by upwelling currents, larger benthic foraminifera and coral build-ups\u00a0were replaced by oyster reefs. The Ghomaride Domain represents an intermediate case between fossil assemblages\u00a0of the northern Tethyan margin and eastern sector of the southern margin of the Tethys, with a dominance of\u00a0larger benthic foraminifera but with a certain presence of corals as well. A good correlation exists between Eocene\u00a0warm intervals and carbonate platform deposits in these domains. Contrarily, during cooling ones shallowing and\u00a0gaps in the sedimentation are registered.<\/p>\n
![\"\"](\"https:\/\/blogs.ua.es\/westerntethys\/files\/2023\/09\/gomaride_eoceno-1024x990.png\")
A synthetic column of the Eocene Ghomaride succession, highlighting the correlation with transgressive\u2013regressive depositional trends, terrigenous-nutrient inputs, sedimentary environments, photic and trophic conditions and main biotic assemblages.<\/p><\/div>\n
Two anomalies have been detected in the Ghomaride Domain during\u00a0Ypresian and Bartonian times indicating particular climatic conditions or local tectonic interferences.<\/p>\n