)[1] The formation consists of a variety of lithologies (rock varieties) including amphibolite, various schists and gneisses of intermediate to felsic composition, quartzite, metasiltstone, and banded iron formation.

The beds show indications of mild retrograde metamorphism and dip steeply to the north.

[2] The unit is interpreted as a portion of an island arc accreted to the southern margin of Laurentia as part of the Yavapai Province between 1.8 and 1.755 Gya.

[1] Metasedimentary rocks of the formation are interpreted as turbidites derived from the island arc.

[4] The formation was surveyed in 1969 for iron ore. Magnetite-rich beds were found in a few locations but were not judged economical to exploit.