Landform
Niobrara chalk pyramids on private High Plains grass — white towers, a keyhole arch, and no visitor-center fence.
Field note
The towers stand in a pasture. The keyhole is the named window. Oakley and Quinter are the towns. This plate is Monument Rocks / the Chalk Pyramids, not Monument Valley, not Little Jerusalem, and not a South Dakota clay wall.
Monument Rocks are chalk pyramids in a Gove County pasture — a keyhole arch, no visitor-center fence. Oakley and Quinter are the towns. This plate is the Chalk Pyramids, not Monument Valley and not Little Jerusalem.
