Preliminary Results of the UNEV Pipeline Project XRF Obsidian

Sourcing Study

Brian R. McKee William Self Associates

Tucson, Arizona

W SA

Bamforth’s (1986) Aspects of Curation

1. Production in Advance of Use 2. Multiple-use Design3. Implement Transport Between

Locations 4. Maintenance 5. Recycling

Utah Map Showing UNEV Pipeline Location

42WS2533, Facing South

42WS2460, Facing North

42WS2174, Facing Northeast

42WS2481, Facing North

42IN1187, Facing North

42MD768, Facing West

42MD885, Facing Northeast

42MD3285, Facing South

42MD1447 Obsidian Concentration

42MD754 Obsidian Debitage

Obsidian Biface

Obsidian Elko Corner-Notched Projectile Point Base

Map of Utah Showing Location of UNEV Pipeline

Obsidian Sources Present in UNEV Collection

• Black Rock Area• Wild Horse Canyon• Topaz Mountain• Panaca Summit/Modena• Pumice Hole Mine• Black Mountain• Malad

Obsidian Source and UNEV Pipeline Locations

UNEV Project Obsidian Source Frequencies

0%

13%

55%

1%

24%

0%6%

Malad Topaz Mtn.Black Rock Area Pumice Hole MineWild Horse Canyon Black MountainPanaca Summit/Modena

Relative Frequencies of Artifact Types by Source

0

10

20

30

40

50

60

70

80

90

100

BifacesCores

Proj. Pts.Uniface

Debitage

Bifaces

Cores

Proj. Pts.

Uniface

Debitage

Relative Frequencies of Sources At Sites by Distance Rank

Malad Topaz Mtn.

Black Rock Area

Pumice Hole Mine

Wild Horse

Canyon

Black Mountain

Panaca Summit/Modena

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

% Nearest Source

% 2nd Nearest Source

% 3rd Nearest Source

% Further than 3rd Nearest Source

Source-to-Site Distances by Artifact Type

Artifact TypeNo.

Sourced Pieces

Min Dist.

Max Dist.

Median Dist.

Freq. Nearest Source

Freq. 2nd Nearest Source

Freq. 3rd Nearest Source

Freq. Further than 3rd

Nearest Source

Debitage 867 5 321 25 661 (76%) 132 (15%) 40 (5%) 34 (4%)

Cores 28 7 85 10 26 (93%) 1 (3.5%) 0 1 (3.5%)

Projectile Points 78 5 330 38.5 39 (50%) 25 (32%) 7 (9%) 7 (9%)

Other Bifaces 31 5 108 25 23 (74%) 5 (16%) 2 (6.5%) 1 (3.2%)

Unifaces 5 7 37 22 5 (100%) 0 0 0

All Artifacts 1009 5 330 25 754 (75%) 163 (16%) 49 (5%) 43 (4%)