Where: Texas · North America · approx. 30.88, -98.65 (vicinity only)
Why this spot: Rockhounding locality: the world's only llanite dike, brown rhyolite studded with opalescent blue quartz, cut by the highway north of Llano
What turns up: llanite with blue quartz phenocrysts, rhyolite
Access: Gray area.
Roadcut on the TX 16 right of way: loose hand samples are commonly taken but the ROW is state controlled and parking is tight; treat it as look-mostly and take only loose spalls
Open in Mudlark Map →
Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.
Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.