Llallagua Formation


The Llallagua Formation is a Rhuddanian to Homerian geologic formation of western Bolivia. The formation comprises siliciclastic sedimentary rocks. The fossil fauna suggests a warm water, nearshore current was active allowing northern hemisphere benthos to exist in the formation.

Fossil content

The formation has provided the following fossils:Atrypa reticularisLeptaena rhomboidalisOrthostrophia cf. dartaeChonetes sp.Dalejina sp.Dalmanites sp.Orthostrophella sp.Plectodonta sp.Protochonetes sp.