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National Geologic Map Database
Geologic Unit: Lowell
Map showing publication footprint
  • Usage in publication:
    • Lowell formation
  • Modifications:
    • Original reference
    • Biostratigraphic dating
  • Dominant lithology:
    • Limestone
    • Dolomite
    • Sandstone
    • Shale
    • Conglomerate
  • AAPG geologic province:
    • Pedregosa basin
Publication:

Stoyanow, A.A., 1949, Lower Cretaceous stratigraphy in southeastern Arizona: Geological Society of America Memoir, 38, 169 p.


Summary:

Pg. 8-19, 36 (table 6), pl. 27. Lowell formation of Bisbee group. Series of alternating sandstones, shales, and limestones. Includes following members (new) in ascending order: Pacheta, Joserita, Saavedra, Cholla, Quajote, Perilla, and Pedregosa. Total thickness 1,104 feet. Overlies Morita formation; underlies Mural limestone (restricted to upper part of Ransome's Mural limestone; lower part of Ransome's Mural limestone = Lowell formation). Age is Early Cretaceous (Aptian to Albian); PARAHOPLITES MELCHIORIS to LEYMERIELLA TARDEFURCATA standard ammonite zone.
Type locality: Ninety One Hills area [local name for hills in secs. 14 and 23, T. 24 S., R. 24 E.], immediately north of International border in vicinity of International Monument No. 91, southeast of Bisbee Junction on Southern Pacific RR [formerly El Paso and Southwestern RR], and southwest of Schlandt Ranch, [Bisbee 15-min quadrangle], Cochise Co., southeastern AZ. Named from community of Lowell [now a part of Bisbee].
[Misprint (US geologic names lexicon, USGS Bull. 1200, p. 2251): the listed alternate usage is incorrect; the Lowell Limestone in Allegheny Formation = Newberry's (1878) Pennsylvanian Lowell Limestone of Ohio.]

Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 2251).


Map showing publication footprint
  • Usage in publication:
    • Lowell formation
  • Modifications:
    • Not used
Publication:

Hayes, P.T., and Landis, E.R., 1961, Lower member of Mural Limestone of Early Cretaceous age, Bisbee Quadrangle, Arizona, IN Geological Survey Research 1961; short papers in the geologic and hydrologic sciences; Articles 1-146: U.S. Geological Survey Professional Paper, 424-B, p. B125-B127.


Summary:

Not used. Name applied by Stoyanow (1949) to the lower member of Mural limestone and upper beds of Morita formation of Ransome (1904). The base of Lowell formation found to not be readily traceable, whereas the base of Mural limestone as originally defined by Ransome (1904) can be mapped readily within narrow stratigraphic units. Rocks at Lowell type section duplicated by a fault. Several writers assumed that Lowell was a replacement name only for the lower member of the Mural. Stoyanow did not clearly state that several hundred ft of Morita were also included in Lowell.

Source: GNU records (USGS DDS-6; Denver GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).