Descriptive Attribute	Value(s)
Collection Name/number	SCI-05
Owner	US Department of the Navy, Naval Facilities Engineering Command, Southwest
Micro Photo?	yes; 2
Macro Photo?	yes
Recovery Type	Survey
Unit	Unknown
Depth (cm)	Surface
Condition	Broken
Material Class	Groundstone
Object Type	Donut stone
Rock Type	Volcanic (slightly vesicular, dacitic)
Weight (g)	254.3
Maximum Object Diameter (cm)	10.8
Maximum Object Thickness (cm)	4.5
Minimum Perforation Diameter (cm)	2.0
Wear Distribution	Use-wear inside hole, most intensively at narrowest point.
Wear Characteristics (up To 40x)	Leveling and sheen on high areas. At 20x can see leveling, sheen, slight rounding of interstice edges, and directionality of wear through hole.
Comments	Flatness related to natural bedrock jointing. Approx. 1/2 of donut stone. Biconical hole
Has note	The SDAC curates several ground-stone -donut- objects collected by archaeologists during survey and excavation across sites in Southern California.