El Mármol onyx quarries

ROCKHOUNDING PERMISSION REQUIRED DOCUMENTED

Where: Baja California · North America · approx. 29.9, -114.8 (vicinity only)

Why this spot: Historic Baja onyx (travertine) quarries

What turns up: Onyx

Access: Permission required.

Old quarry ground; desert access

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.