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as <br />• Size range: thickness, 21-31 mm. <br />Special notes: the edge-modified specimen has only minimal wear and <br />. pecking on reverse face. <br />Ground stone: bifacial grinding, shallow basin, Type IIB. Four specimens. <br />Description: similar to unifacial shallow basin type, but contains <br />wear on both faces. <br />Materials: coarse-grained quartzite, and sandstone. <br />Variation in surface texture: smooth to coarse. <br />Edge wear: one specimen has spalling on an edge. <br />Variation: two specir~rens Piave well-defined use on both faces, and two <br />have extensive use on one face with minimal use on the other. <br />Size range: thickness, 28-38 mm. <br />Ground stone: bifacial grinding, deep basin, Type IIC. One Specinle nS. <br />Description: made on thick sandstone slab, with pronounced concavity, <br />shows reciprocating grinding motions striae. <br />Material: sandstone. <br />Surface texture: smooth with visible pecking. <br />Edge wear: edge spalling present. <br />Size range: thickness, 79 mm. maximum; 45 mm. minimum. <br />:~ <br />Special notes: reverse side has only slight concavity, and heavy <br />slightly worn pecking. <br />Ground stone: manor. Manor reflect somewhat more diversity in form <br />and modification than do the grinding slabs. Manor can be unifacial, <br />bifacial, or multifacial, depending upon the method used to process <br />foodstuffs. Unmodified river cobbles could be used in a natural state, <br />providing they have the proper characteristics. Since manor tend to be <br />of a convenient size and shape, they have potential applications as <br />hammerstones or pecking stones, for example, in addition to seed grind- <br />ing. <br />The collection of manor recovered contains specimens with almost <br />all of the above mentioned characteristics. In general the manor re- <br />covered are one-hand size (they fit comfortably in one hand). Most are <br />made of sandstone, but a few are made from igneous rock such as vesi- <br />cular basalt, or metamorphic rock such as quartzite and schist. Almost <br />all specimens have been pecked or ground to modify the working face, or <br />the overall size and shape of the original stone, making it more con- <br />venient to use. <br />Several members are not modified other than having utilized faces. <br />Several others show evidence of battering on the ends. This could re- <br />sult from use as a crushing tool for breaking up unusually tough food- <br />stuffs. for refacing metates, or for any number of other purposes. It <br />appears that the primary use of such tools was for grinding, and that <br />• any pounding, crushing, or bashing was secondary. <br />