Rock Art Stability Index Overall Panel Scoring

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Rock Art Stability Index Overall Panel Scoring

• Ron Dorn
• Arizona State University

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Scale and Consistency
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Excellent Condition Why?

• Largest issues are plant growth near panel, some
  scaling of the rock, and detachment of the rock
  varnish
• Step 6 (Vandalism) is of minor concern because
  site is at the Deer Valley Rock Art Center

• Basalt talus tends to display very little
  evidence of weathering and erosion

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Good Condition Why?

• Largest issues are plant growth near panel, some
  scaling of the rock, and detachment of the rock
  varnish
• Step 6 (Vandalism) is of minor concern because
  site is on private land with a site steward

• Silicified dolomite bedrock has few weaknesses
  for weathering to get a foothold

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• Score
• 28

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Good ConditionWhy?

• Largest issues are fissures that are from lava
  flow generation and cooling, and collapse of
  tumuli separating the top layers from the rest of
  the flow
• Scaling, anthropogenic activity also issues

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Problems Why?

• Despite strong granite rock, abundant fissures
  (joints)

• Largest issues are granular distintegration,
  fissuresol wedging, undercutting, and lichens
• Step 6 (Vandalism) is a substantial concern
  because site is in a metropolitan area and is
  receives heavy visitation

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30 (raw score) 20 50

• Stage 6
• could add
• 20 points
• to reflect
• vandalism
• concern

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Problems Why?

• Largest issues are weakness of the sandstone,
  development and then flaking of the weathering
  rind, and splintering along bedding planes

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Problems Score 33
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Why problems with this panel?

• Large issues are scaling, undercutting
• Site manager might put this site in great
  danger because of visitor use abrade panels

• Also flaking, granular disintegration, salt
  efflorescence, detachment of the pictograph paint

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Great Dangers Biggest Issues

• Salt Efflorescence

• Fluvial Abrasion

• Flaking of Weak Sandstone

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Severe Dangers A host of issues

• Lots of fissures, weak rock, wedging by
  fissuresols, plant growth, scaling, splintering,
  undercutting, development and erosion of
  weathering rinds, crumbling of rock under
  lichens, granular disintegration, flaking,
  detachment of rock coatings, scaling, chalking,
  graffiti, and salt efflorescence

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Display Information
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Rock Art Stability Index Overall Panel Scoring
Ron Dorn Arizona State University