Rattenborg and Blanke (2017:19–21) report that on the southwest hill, excavations by the Late Antique Jarash Project (LAJP) exposed a storeroom situated in the southern part of a residential building and opening onto a courtyard. The stone-built walls rested directly on bedrock, and the floor consisted of hard-packed yellow clay. The installation of piers along the north and south walls, together with the recovery of arch-stones, demonstrates that the roof was vaulted and covered with the same yellow clay used in the walls. The building collapsed in a single violent event — an earthquake — leading to the abandonment of the structure.

A deposit associated with the final use of the building and sealed by collapse contained ceramic vessels associated with cooking and food storage. The ceramic assemblage comprised roughly 1,000 sherds representing 22 nearly intact vessels, with only a few sherds from other pots. Of these 22 vessels, nine were large pithoi-style storage jars, while the remaining 13 consisted of smaller storage jars, cooking pots, and several examples of fine wares. Several vessels can confidently be dated to the Abbasid period. Particularly noteworthy are sherds from three vessels produced in a hard black fabric with a polished surface, comparable to Abbasid sherds from layers near the congregational mosque in central Jerash. A black beaker is distinctively Abbasid in form and resembles examples from Pella and Jerusalem dating to the late 8th or 9th centuries. The fabric matches a rare early Abbasid specimen from Nabratein (Magness 1994). Unfortuantely, for dating purposes, Rattenborg and Blanke (2017:29) note that “the available archaeological record of the 9th–11th centuries is notoriously meagre and marred by a dissatisfying degree of chronological control.”

Abbasid material from Jerash indicates a destruction event sometime in the second half of the 8th, 9th, or 10th century CE. Although the Abbasid Caliphate underwent increasing decentralization during this period—especially after the assassination of Caliph al-Mutawakkil in 861 CE—the Levant remained under effective Abbasid authority until the late 10th century. This chronological interpretation assumes that Abbasid material culture, including ceramic forms, did not continue in significant quantities once political control had shifted to successor dynasties.