Cemetery Wall Mortar Texture Gradients as Communal Temporal Calibration in Oaxaca’s Mixtec Highlands

瓦哈卡米斯特克高地墓园墙体灰浆质地梯度：一种社群时间校准机制

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In Oaxaca’s Mixtec highlands, cemetery wall mortar textures shift gradually from coarse volcanic grit near ground level to fine-ground shell lime at eye height, mapping communal memory rather than structural necessity.
Each texture band corresponds to a decade’s collective mourning labor—coarser bands represent periods of epidemic loss, finer ones signal demographic stabilization or return migration.

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