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Embedded Behavior: Human Activities and the Construction of the Mesolithic Shellmound of Cabeço da Amoreira, Muge, Portugal

Shellmound formation processes are greatly influenced by human inputs associated with an intensive exploitation of marine and estuarine resources. The complex stratigraphy of shellmounds has been difficult to decipher and few studies have focused on the microstratigraphic record of midden formation, especially in European Mesolithic contexts. Cabeço da Amoreira is a long‐known Mesolithic shellmound located on the shores of the Muge River, a tributary of the Tagus River in central Portugal. The abundance of shellfish refuse favors an intricate and laterally variable stratigraphic succession of layers and lenses, which results in an extensive artificial mound. Here, we use micromorphological and microfacies analysis to investigate aspects pertaining to site formation, and the nature of individual anthropogenic activities at the site. This methodology allowed for a distinction between primary activities (e.g., discrete shell tossing events, trampled occupational surfaces, and activity areas), and secondary position of the sediments in intentionally raked‐up and dumped deposits. Nondepositional hiatuses and discrete geogenic sedimentation are associated with periods of abandonment. The complex superposition of events seen at Cabeço da Amoreira underlines the role of micromorphology for the identification of behavioral signatures and its relevance in deciphering shellmound adaptations.