Considering Olsson’s (1940) statement about the frequent occurrence of carbonate lenses with the Pleurophopsis fauna in the Sinú River basin mentioned above, this could possibly refer to Mata de Caña, about 20 km S of Lorica in the Department Córdoba, along the Sinú River, at 9°04’30” N, 75°49’30”W. The carbonate consists mostly of a peloidal micrite with microdetritus and abundant signs of bioturbation.
Source: wiktionary