Object Record

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Collection Speer Collection
Catalog Number 1999.0001.1470
Object Name Metate
'Iipay Aa Name 'ehpii
Description A whole, portable flat stone grinding platform, also known as a metate. It dates to the Late Prehistoric [300-800 years ago]. The color is black and the material is vesicular basalt, or scoria, with a few calcite inclusions. This material is unique and unusual among Kumeyaay/Diegueño objects with the majority of metates in this region being granitic. It has a central grinding surface that was formed by undulating, back and forth, grinding movements typically with a hand-held grinding stone, called a mano.

This grinding or milling stone's ventral platform is polished for an area that extends nearly over the entire top and is 12 inches ( 30.5 cm) long and 8.5 inches (21.5 cm) wide. Construction of the metate created a rectangular stone, smooth over most of the surface area. The dorsal side of the stone is curved with a flatter, stable base measuring 12 inches (30.5 cm) long and 8.5 inches (21.5 cm) wide. There is an area on one end that shows the original exterior gray cortex, roughly 7 inches (16.5 cm) long and 2.5 inches (6.5 cm) wide.

Length - 19.133", Width - 10.157", Height - 4.015", Weight - 35 lbs.

Provenance This artifact was found within the local San Diego County region, 1910-1950. The material is vesicular basalt and may be associated with volcanic areas near the Salton Sea at Obsidian Butte.
Date Late Prehistoric (1300-800 YA)
Material Basalt
Culture Kumeyaay / Diegueño
Place of Origin San Diego County
Caption Basalt Metate -horizontal view, ventral side (working surface.)