Moqui marbles, utah Iron oxide concretions (Moqui marbles) Moqui Marbles, hematite concretions, from the Navajo Sandstone of southeast Utah. The Navajo Sandstone is also well known among rockhounds for its hundreds of thousands of iron oxide concretions
Moqui marbles, utah Iron oxide concretions (Moqui marbles) Moqui Marbles, hematite concretions, from the Navajo Sandstone of southeast Utah. The Navajo Sandstone is also well known among rockhounds for its hundreds of thousands of iron oxide concretions