Rock Island Complex Data, Bass Point Mound: Strata

The strata represent major natural or cultural depositional events such as erosional fill, roof fall, floor contexts, and sterile substrate. Strata are depicted as horizontal rows of interconnected boxes on a Harris Matrix. Within a feature, each stratum is designated by the feature number (e.g., 10, 11, 12, etc.) and a letter that designates a particular stratum (e.g., A, B, C). The letters are assigned in descending order. Mixed levels and artifacts collected out of context are designated by a "?". Artifacts from each feature (or mixed context) are tallied according to strata. Please see column metadata for further detail.地层代表主要的自然或文化沉积事件，例如侵蚀充填堆积、顶板垮落堆积、地面埋藏环境以及无遗物基底。在哈里斯矩阵（Harris Matrix）中，地层被描绘为相互连接的水平矩形行。在单个遗迹单元内，每个地层由遗迹编号（如10、11、12等）与代表该特定地层的字母（如A、B、C）共同标识。字母按照降序规则进行分配。混杂层位以及脱离出土背景采集的人工遗物，均以“?”标识。各遗迹单元（或混杂背景）出土的人工遗物将依据地层进行统计计数。如需进一步了解详情，请查阅列元数据。