Geologic Unit: Pilar

Usage:

Pilar Formation of /Hondo Group (NM-recognized locally in Tusas Mountains area)

[Hondo Group preempted by Hondo Sandstone Member of Lang (1937) in NM.]

Geologic age:

early Mesoproterozoic

Type section, locality, area and/or origin of name:

Named from village of Pilar, situated at north-central border of [Picuris Mountains] at a point several mi east and north of prominent outcrops of phyllite. Occurs in 2 main east-west belts of 0.5 mi width that extend from upper Hondo Canyon to Piedra Lumbre Canyon, and thence offset to the south to continue as a single, westward tapering belt; [Picuris Mountains], Taos Co., [Carson National Forest area], central northern NM (Montgomery, 1953).
Principal reference section (Hondo Group): Hondo Canyon area, in secs. 29 and 32, T. 24 N., R. 12 E., Taos SW 7.5-min quadrangle, Taos Co., northern Picuris Mountains, [Carson National Forest area], central northern NM (Bauer and Williams, 1989).

AAPG geologic province:

Southern Rocky Mountain region