Comparative Morphological Analysis of Calcined Bone
Document Type
Oral Presentation
Campus where you would like to present
SURC Ballroom B/C/D
Start Date
21-5-2015
End Date
21-5-2015
Keywords
Zooarchaeology, Calcined Bone, Artiodactyl
Abstract
Along the Pacific Northwest Coast of North America, faunal remains are rarely preserved within archaeological contexts,outside of coastal sites with shell middens. This is primarily due to the degradation of bone by humic acids in the soils (pH 4.5-5.5) and carbonic acids caused by heavy precipitation. Preserved bones in archaeological contexts in this region are typically highly burned, or calcined. Calcined bone is known to entail a size reduction compared to unburned bone, but the nature of the reduction is unknown. The question this project seeks to answer is: Does calcining cause significant change in bone size and weight? Consequently, this experiment documents the amount of change observed in artiodactyl phalanges (i.e., elk and black-tailed deer) by calcining, either via heating in a semi-temperature-controlled outdoor wood fire, and/or by heating in a completely temperature-controlled indoor muffle furnace. Twelve separate variables were measured before and after burning on the first phalanx and second phalanx specimens. Eight distinct variables were recorded on the third phalanx specimens. In addition to 38.13 percent mean weight loss expected due to the loss of the organic component of the bone, several variables exhibit noteworthy change. The height in region of extensor process variable displays a mean reduction of 7.52 percent, and the breadth proximal variable showed 4.39 percent mean reduction. Bones burned in the muffle furnace had uniform color and burning stage and no fracture, while those burned in the outside fire had variable results for all of these attributes, including extensive fracturing.
Recommended Citation
Davis, David and Brown, James, "Comparative Morphological Analysis of Calcined Bone" (2015). Symposium Of University Research and Creative Expression (SOURCE). 100.
https://digitalcommons.cwu.edu/source/2015/posters/100
Poster Number
46
Department/Program
Resource Management
Additional Mentoring Department
Anthropology & Museum Studies
Comparative Morphological Analysis of Calcined Bone
SURC Ballroom B/C/D
Along the Pacific Northwest Coast of North America, faunal remains are rarely preserved within archaeological contexts,outside of coastal sites with shell middens. This is primarily due to the degradation of bone by humic acids in the soils (pH 4.5-5.5) and carbonic acids caused by heavy precipitation. Preserved bones in archaeological contexts in this region are typically highly burned, or calcined. Calcined bone is known to entail a size reduction compared to unburned bone, but the nature of the reduction is unknown. The question this project seeks to answer is: Does calcining cause significant change in bone size and weight? Consequently, this experiment documents the amount of change observed in artiodactyl phalanges (i.e., elk and black-tailed deer) by calcining, either via heating in a semi-temperature-controlled outdoor wood fire, and/or by heating in a completely temperature-controlled indoor muffle furnace. Twelve separate variables were measured before and after burning on the first phalanx and second phalanx specimens. Eight distinct variables were recorded on the third phalanx specimens. In addition to 38.13 percent mean weight loss expected due to the loss of the organic component of the bone, several variables exhibit noteworthy change. The height in region of extensor process variable displays a mean reduction of 7.52 percent, and the breadth proximal variable showed 4.39 percent mean reduction. Bones burned in the muffle furnace had uniform color and burning stage and no fracture, while those burned in the outside fire had variable results for all of these attributes, including extensive fracturing.
Faculty Mentor(s)
Patrick Lubinski