Rock Art Stability Index

Overall Panel ScoringRon DornArizona State University

Ron DornArizona State University

Scale and ConsistencyScale and Consistency

Excellent Condition: Why?Excellent Condition: Why?

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

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

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

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

Good Condition: Why?Good Condition: Why?

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

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

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

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

Score 28

Score 28

Good Condition

Why?

Good Condition

Why?

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

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

Problems: Why?Problems: Why? Despite strong

granite rock, abundant fissures (joints)

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

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

Stage 6could

add20 pointsto reflect vandalis

mconcern

Stage 6could

add20 pointsto reflect vandalis

mconcern

30 (raw score)

+ 20 = 50

30 (raw score)

+ 20 = 50

Problems: Why?Problems: Why?

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

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

Problems – Score 33Problems – Score 33

Why problems with this panel?

Why problems with this panel?

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

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

Large issues are scaling, undercutting

Site manager might put this site in “great danger” because of visitor use abrade panels

Large issues are scaling, undercutting

Site manager might put this site in “great danger” because of visitor use abrade panels

Great Dangers: Biggest Issues

Great Dangers: Biggest Issues

Fluvial AbrasionFluvial Abrasion

Salt EfflorescenceSalt Efflorescence

Flaking of Weak SandstoneFlaking of Weak Sandstone

Severe Dangers: A host of issues

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

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

Display Information

Display Information

Rock Art Stability Index

Overall Panel ScoringRon DornArizona State University

Ron DornArizona State University