Rock Island Complex: Shell Taxa from Screened Contexts

The Rock Island Complex Data tables provide a summary of the artifacts recovered during Arizona State University (ASU), Office of Cultural Resource Management's (OCRM) Roosevelt Platform Mound Study (RPMS) excavations at sites in the Rock Island Complex, primarily Bass Point Mound (AZ U:8:23(ASM), AR-03-12-06-177(USFS)) and AZ U:8:400(ASM)(AR-03-12-06-863(USFS)). The Rock Island Complex Data table Shell Taxa from Screened Contexts presents a summary of the shell taxa of the shell artifacts recovered from excavated, screened contexts at Bass Point Mound.

The table identifies each archaeological site by its Arizona State Museum (ASM) site number and its USFS Tonto Forest number (ASM number/last three digits of Tonto Forest number) (e.g., U:8:23/177). It lists designated archaeological contexts - strata - at the site, and then provides the frequency (count) of shell artifacts with different shell taxon designations. Note that it provides a count of artifacts (NOT individual shell pieces) identified to individual taxa. Thus, a shell bracelet in 3 pieces identified to a shell taxon will count as 1 artifact for that taxon.

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. Please also see the data table "Rock Island Complex, Bass Point Mound Data: Strata" for further data about each stratum, including the assigned stratum type, at the following tDAR url: http://core.tdar.org/dataset/394255

The Rock Island Complex Data tables were originally published in the Roosevelt Platform Mound Monograph Series No. 4 titled "Where the Rivers Converge, Roosevelt Platform Mound Study: Report on the Rock Island Complex." The tables were published in an appendix at the end of the volume. Please see the report volume at the following tDAR URL: https://core.tdar.org/document/380998

洛克岛遗址群数据集表格汇总了亚利桑那州立大学（Arizona State University, ASU）文化资源管理办公室（Office of Cultural Resource Management, OCRM）在洛克岛遗址群各遗址开展的罗斯福台地研究（Roosevelt Platform Mound Study, RPMS）发掘过程中出土的遗物，主要涵盖巴斯角丘（Bass Point Mound，编号AZ U:8:23(ASM)、AR-03-12-06-177(USFS)）与AZ U:8:400(ASM)（编号AR-03-12-06-863(USFS)）两处遗址。其中“洛克岛遗址群数据集表格：筛选堆积单元贝壳分类群”汇总了在巴斯角丘发掘的、经筛选的堆积单元中出土的贝壳类遗物的分类群信息。

该表格以亚利桑那州立博物馆（Arizona State Museum, ASM）遗址编号与美国林务局（USFS）汤顿森林区编号（格式为：ASM遗址编号/汤顿森林区编号末三位，例如U:8:23/177）标识每一处考古遗址，依次列出遗址内指定的考古堆积单元（地层），并给出不同贝壳分类群对应的贝壳遗物计数频次。请注意，此处统计的是遗物数量（而非单个贝壳残件），即一件被归为某一贝壳分类群的3片残件贝壳手镯，仅计为该分类群的1件遗物。

此处的地层代表主要的自然或文化沉积事件，包括侵蚀堆积、屋顶坍塌堆积、居住面堆积以及无菌母质。地层在哈里斯层位矩阵（Harris Matrix）中以相互连接的横向方格行呈现。在单个遗迹内，每一层地层由遗迹编号（如10、11、12等）与代表特定地层的字母（如A、B、C）共同标识，字母按降序排列。混杂堆积层与脱离原生层位的遗物以“？”标注。各遗迹（或混杂堆积单元）的遗物需按地层进行计数。详细信息请参见列元数据；如需了解各地层的指定地层类型等更多数据，请访问以下tDAR数据集链接：http://core.tdar.org/dataset/394255，查看数据集“洛克岛遗址群、巴斯角丘数据集：地层”。

洛克岛遗址群数据集表格最初刊载于《河流汇流处：罗斯福台地研究：洛克岛遗址群报告》（收录于罗斯福台地研究专题著作系列第4号），以附录形式置于该卷末尾。如需查阅该报告全文，请访问以下tDAR文档链接：https://core.tdar.org/document/380998