Descriptive Attribute	Value(s)
Collection Name/number	SCI-09
Owner	US Department of the Navy, Naval Facilities Engineering Command, Southwest
Micro Photo?	yes; 3
Macro Photo?	yes
Recovery Type	Survey
Unit	Not given
Depth (cm)	Surface
Condition	Broken
Material Class	Groundstone
Object Type	Donut stone
Rock Type	Volcanic (vesicular,dacitic)
Weight (g)	174.8
Maximum Object Diameter (cm)	8.8
Maximum Object Thickness (cm)	5.2
Minimum Perforation Diameter (cm)	1.5
Wear Distribution	Use-wear inside hole, most intensively at narrowest point. Light use-wear also on one side surface, wrapping slightly around into hole and wrapping onto edge.
Wear Characteristics (up To 40x)	Inside hole: Leveling, rounding, and high sheen on high areas. Light striations through sheen indicate directionality of wear through hole. On side surface: light leveling, rounding of interstice edges, and sheen on high areas.
Comments	Approx. 1/2 of donut stone. Biconical hole. Other id #78-BW-1-8-531
Has note	The SDAC curates several ground-stone -donut- objects collected by archaeologists during survey and excavation across sites in Southern California.