[1] It has a radiometric age of 1660 million years (Ma), corresponding to the Statherian period.

[1] The formation was included in the Manzano Group by Mark Holland and coinvestigators in 2020.

It is a sequence of metavolcanic and metasedimentary beds, typically dark green in color, with its texture varying from unfoliated to strongly schistose.

[4] The more foliated beds are chlorite or hornblende schist, but much of the formation is igneous rocks that have experienced only mild metamorphism.

[1] Metamorphic conditions reached 550±50 °C and 2±1 kb pressure, corresponding to a low-pressure amphibolite facies.