Where: Guadalajara · Europe · approx. 40.84, -1.89 (vicinity only)
Why this spot: Triassic Keuper marl
What turns up: Reddish hexagonal-looking pseudohexagonal aragonite twins, single and star clusters in red clay
Access: Gray area.
Aragonite weathers out of red Keuper clays in the region; roadside and field exposures, respect private land.
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.