ABSTRACT James Bennyhoff proposed a “Meganos intrusion” of people from the California Delta into the San Francisco Bay Area. Using new radiocarbon and stable isotope data, we re-examine stratigraphic and mortuary patterns at CA-CCO-151, the El Sobrante Mound. Which contains both a pre-Meganos (or Berkeley) and Meganos component. Results show that the transition to Meganos was gradual, occurring over a 200-year window between 1,400 and 1,210 cal B.P., with mortuary traits accumulating in piecemeal fashion. This is less consistent with an intrusion, and more in line with a slow diffusion of Meganos culture into the Bay Area. We propose a new model, wherein patrilocal Meganos populations had higher intrinsic growth rates than matrilocal Berkeley populations. Meganos males were able to marry into matrilocal Bay Area communities, and once there, passed on certain aspects of Meganos culture to their children. By virtue of higher Meganos out-migration, Bay Area communities slowly transitioned over roughly eight generations.

中文翻译：

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在 El Sobrante (CA-CCO-151) 用新的稳定同位素和放射性碳分析重新审视加州中部 Meganos 侵入

摘要 James Bennyhoff 提出了一项“Meganos 入侵”，将加利福尼亚三角洲的人引入旧金山湾区。使用新的放射性碳和稳定同位素数据，我们重新检查了 El Sobrante Mound CA-CCO-151 的地层和太平间模式。其中包含一个前 Meganos（或 Berkeley）和 Meganos 组件。结果表明，向 Meganos 的过渡是渐进的，发生在 1,400 到 1,210 cal BP 之间的 200 年窗口中，太平间特征以零碎的方式积累。这与入侵不太一致，而更符合梅加诺斯文化向湾区的缓慢扩散。我们提出了一个新模型，其中父系 Meganos 种群比母系伯克利种群具有更高的内在增长率。Meganos 男性能够与母系湾区社区结婚，一旦到达那里，将梅加诺斯文化的某些方面传给了他们的孩子。由于梅加诺人更多地向外迁移，湾区社区在大约八代人的时间里慢慢过渡。