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A metate (or mealing stone) is a type or variety of quern, a ground stone tool used for processing grain and seeds. In traditional Mesoamerican cultures, metates are typically used by women who would grind nixtamalized maize and other organic materials during food preparation (e.g., making tortillas ).
It, like much of Sahelian architecture, is built with a mudbrick called Banco, [17] a recipe of mud and grain husks, fermented, and either formed into bricks or applied on surfaces as a plaster like paste in broad strokes. This plaster must be reapplied annually.
From prehistoric times there have been examples of graves covered with a stone slab, in its natural state or carved. This use of slabs as tombstone has extended the concept of natural slab to the tombstone variant: flat, thin and polished. An instance is the slab in the tomb of King Pere el Gran of Aragon, which weighs 900 kg. [8]
The basic anatomy of a millstone. This is a runner stone; a bedstone would not have the "Spanish Cross" into which the supporting millrind fits.. Millstones or mill stones are stones used in gristmills, used for triturating, crushing or, more specifically, grinding wheat or other grains.
Stone slab in east-central California used to grind acorns. In archaeology, a grinding slab is a ground stone artifact generally used to grind plant materials into usable size, though some slabs were used to shape other ground stone artifacts. [1] Some grinding stones are portable; others are not and, in fact, may be part of a stone outcropping.
Slate is a fine-grained, metamorphic rock that shows no obvious compositional layering but can easily be split into thin slabs and plates. [2] [3] It is usually formed by low-grade regional metamorphism of mudrock.
Engineered stone is a composite material made of crushed stone bound together by an adhesive to create a solid surface. The adhesive is most commonly polymer resin, with some newer versions using cement mix. This category includes engineered quartz (SiO 2), polymer concrete and engineered marble stone. [1]
Slab pull force, the tectonic plate force due to subduction; Slab suction, one of the major plate tectonic driving forces; Slab window, a gap that forms in a subducted oceanic plate; Slab (fossil) and counter slab, the two counterparts of a fossil impression; Slab hut, a kind of dwelling made from slabs of split or sawn timber; Slab of beer, a ...