Environmental

What is 'desert varnish' and why might it matter in Nevada real estate development?

AA paint product used on desert homes to reflect heat
BA dark mineral coating found on exposed rock surfaces in Nevada; areas with intact desert varnish may indicate the presence of Native American petroglyphs, triggering cultural resource protections and development restrictions✓ Correct
CA type of soil crust that must be disturbed for foundation work
DWaterproofing applied to stucco in desert climates

Explanation

Desert varnish is a dark iron/manganese oxide coating on rocks, often found bearing ancient petroglyphs created by Native Americans. In Nevada, sites with petroglyphs are protected under state and federal law (National Historic Preservation Act, Section 106).

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