Geologic Unit: Montoya

Usage:

Montoya Group (NM*,TX*)
Montoya Dolomite (NM*,TX*)
Montoya Formation (NM*)

Subunits:

GROUP STATUS (alphabetical): Aleman Formation (NM*,TX*) or Aleman Dolomite (NM*), Cable Canyon Sandstone (NM*,TX*), Cutter Dolomite (NM*,TX*) or Cutter Formation (NM*,TX*), Rio Mimbres Sandstone (NM,TX), Second Value Dolomite (NM*,TX*), Upham Dolomite (NM,TX*).
FORMATION STATUS (alphabetical): Aleman Member (NM*,TX*) or Aleman Dolomite Member (NM*), Cable Canyon Sandstone Member (NM*,TX*), Cutter Member (NM*,TX*) or Cutter Dolomite Member (NM*), Second Value Member (NM*), Upham Member (NM*,TX*).

Geologic age:

Late Ordovician (Cincinnatian)*

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

Not designated. Origin of name not stated. Occurs in El Paso and Van Horn quadrangles, El Paso and Culberson Cos., TX (Richardson, 1908).

AAPG geologic province:

Basin-and-Range province*
Orogrande basin*
Pedregosa basin*
Permian basin*