On the top of the country immediately at the junction of the Grand (now Colorado) and Green Rivers, west side. Utah. September 17, 1871.
USGS Earth Science Photographic Archive digital file: hjk00608

The region east of the Confluence of the Green and Colorado rivers is called the Needles District of Canyonlands National Park. It is a region known for slick-rock expanses of in the Organ Rock Sandstone and towering spires of the overlying Cedar Mesa Sandstone (both of Permian age; and both are visible in this image). Despite dwindling food supplies, the Second Powell Expedition took time in late September 1871 to explore the rugged upland region around the Confluence of the Colorado and Green rivers.