Descriptive Attribute	Value(s)
Collection Name/number	SCI-09
Owner	US Department of the Navy, Naval Facilities Engineering Command, Southwest
Micro Photo?	yes; 5
Macro Photo?	yes
Recovery Type	Survey
Unit	Not given
Depth (cm)	Surface
Condition	Broken
Material Class	Groundstone
Object Type	Donut stone
Rock Type	Volcanic (slightly vesicular, dacitic)
Weight (g)	133.9
Maximum Object Diameter (cm)	Not measurable
Maximum Object Thickness (cm)	4.7
Minimum Perforation Diameter (cm)	1.9
Wear Distribution	Use-wear inside hole, most intensively at narrowest point. Use-wear also on both side surfaces, wrapping slightly around into hole and around edges.
Wear Characteristics (up To 40x)	Leveling and sheen on high areas. Most complete leveling and intense sheen at narrowest point of perforation. Rounded interstice edges and high areas. Light parallel linear striations through sheen inside hole at narrowest point show direction of wear through hole. Few light multidirectional striations under sheen on side surfaces.
Comments	Approx. 1/5 of donut stone. Biconical hole. Other id# 79-BW-1-8-642 F
Has note	The SDAC curates several ground-stone -donut- objects collected by archaeologists during survey and excavation across sites in Southern California.