Combined Treasure Map — Layer Key

GEOLOGY LAYERS

	Sandstone Formations (diagonal bands) Geological units with primary rock type = sand or sandstone. These are the host rocks where roll-front uranium deposits form.
	Major Aquifers (cross-hatch, off by default) TWDB major aquifer boundaries. Toggle on to see which aquifer system underlies a target area.
	Groundwater Conservation Districts (off by default) TWDB GCD boundaries. Toggle on to identify regulatory jurisdiction over a target area.

URANIUM SIGNAL LAYERS

	Uranium HeatMap NURE groundwater uranium concentration (ppb). Blue = low, Red = high. Shows the regional geochemical "smoking gun" — anomalous uranium in groundwater leaking from buried ore bodies.
☢	Ghost Targets (Drill Sites) NURE samples with U > 40 ppb that fall inside a sandstone formation. These are the highest-probability drilling targets. Hover for uranium concentration, formation name, age, and water district.

REDOX BOUNDARY LAYERS

◆	Oxidized Zone (Red Sand) — diamonds GWDB wells where lithology logs describe red sand but no gray sand. Red = iron-oxidized = oxygen-rich groundwater has passed through, dissolving and transporting uranium downdip.
▼	Reduced Zone (Gray Sand) — triangles GWDB wells where lithology logs describe gray sand but no red sand. Gray = chemically reduced = uranium precipitates here when oxidized water meets reducing conditions.
✶	REDOX FRONT (Red + Gray in Same Well) — star-bursts Wells with both red and gray sand in their lithology log. This is the redox boundary — the exact interface where roll-front uranium ore concentrates. Hover for depth range of the redox transition.

How to Read This Map
1. Look for ☢ uranium symbols (high uranium) clustered near burnt orange dots (redox front).
2. Confirm they sit on orange polygons (sandstone host rock).
3. The transition zone between ◆ maroon diamonds and ▼ blue triangles traces the roll-front trend line.
= Highest confidence drilling targets.

Data: USGS NURE, TWDB GWDB, USGS TX Geology