Just northwest of Canyon De Chelly, the Shinarump also forms a caprock in Monument Valley across the border region of northern Arizona – and southern Utah.

[2] The associated Black Mesa (Arizona)-Defiance Uplift extends southeast from Monument Valley into the western border region of New Mexico.

In west-central New Mexico, the Shinarump is thin and spotty, transitioning to laterally equivalent beds of the Zuni Mountains Formation.

[5][6] In Monument Valley, of Arizona and south Utah, only larger landforms still contain the protective caprock of the Shinarump Conglomerate.

Though generally uniform in thickness, its lower contact is one of the most prominent unconformities in the Colorado Plateau, occasionally filling deep channels eroded into the underlying beds.

The form of the channels suggests that the Moenkopi was not yet consolidated, but the de Chelly Sandstone was already well cemented, by the time Shinarump deposition began.

[2] The partial geologic sequence is as follows, up to the latest Petrified Forest Member:[8] By the end of the Early and Middle Triassic the 'Triassic Seas' of the western ocean edge of the North American continent were retreating northwest with deposition of the Shinarump (225 Ma) and Petrified Forest Member (215 Ma).

The desert extends in an arc-shape, paralleling the northwest–by–southeast lineage of the Mogollon Rim, but turns due-north, east of Flagstaff, Arizona, on the east border of the San Francisco volcanic field region, as the Little Colorado River turns north, then northwest to enter the Grand Canyon region.

This arc-shaped Painted Desert region surrounds the south and west border of Black Mesa, the Monument Valley to the north, and the Defiance Plateau to the southeast.

[9] Mining of stratiform copper deposits in the Shinarump Conglomerate began at Cañon del Cobre in the 1600s but seems to have been abandoned by 1859.