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Print Optimized PDF File U.S. DEPARTMENT OF THE INTERIOR MISCELLANEOUS FIELD STUDIES MAP MF–2405 U.S. GEOLOGICAL SURVEY Version 1.1 Qesy o 50 o 10 CORRELATION OF MAP AND SUBSURFACE UNITS Basalt cinder and intrusive centers, San Felipe volcanic (1977), lower member of lower unnamed formation of Table 1. Correlation chart for alluvial deposits of the Jemez River 13 Qalo Tbc ULT Qaly field (upper Pliocene)—Vent-related basaltic cinder, Santa Fe Group of Spiegel (1961), upper and middle (upstream is to left), indicated by map unit symbols. Qesy A F spatter, scoria, and dikes. Forms cinder cones, small parts of middle Santa Fe Group units of Personius and [Units in bold type shown on this map. Leaders (--) indicate deposit not mapped in quadrangle] Qalo o Tc Tbc ARTIFICIAL ARROYO EOLIAN COLLUVIUM JEMEZ BEDROCK Tzcc Tcc 10 Qcb shield volcanoes, depressions, and ring dikes and plugs at others (2000), and Navajo Draw Member of Arroyo c Qesy Tb FILL ALLUVIUM DEPOSITS AND LANDSLIDES RIVER A o o eruptive centers; after Kelley and Kudo (1978). Cones Ojito Formation of Connell and others (1999) in Ponderosa Jemez Pueblo Bernalillo NW Santa Ana Qeso o N 9 Qcb ALLUVIUM form an elongate array that trends north-south, in Bernalillo NW quadrangle (Koning and Personius, 2002). quadrangle1 and San quadrangle3 Pueblo A 10 12 o Tc 12o 11 general alignment with numerous normal faults that Mapped as Chamisa Mesa Member of Santa Fe Ysidro quadrangle 2 offset the surface of Santa Ana Mesa (Kelley and Kudo, quadrangles Qaly o Formation by Soister (1952) and as Zia Member of o o12 Qalh Qalh A 10 Qf 15 historic 1978). Thickness unknown Santa Fe Formation by Kelley (1977); also mapped as Qt9 Qt6 Qaj6b Qaj6 SPT 9 Tcc Qalh 9/15/97-4 Cochiti Formation by Smith and others (1970), but o Qesy ANT o15 Holocene Santa Fe Group Qt7, Qt8 Qt5 Qaj6a Qaj6 o Qaly o S Tcc o Qaj6 mostly nonvolcanic clast assemblage suggests different 12 16 o o 55 9 7 57 Tb Significant revisions of the Santa Fe Group have recently been proposed Qt5? Qt4a? Qaj5 Qaj5 Qesy o 9 nomenclature is appropriate (Smith and Lavine, 1996). 14 by Connell and others (1999) in the northern Albuquerque basin. 9 Qesy In fault contact with overlying unit Tou at Tamaya fault. Qt5? Qt5a, Qt4a? Qaj4 -- 70 upper However, this nomenclature is preliminary, and other recent studies have Mostly in fault contact with underlying unit Tzcc at Santa 13o Tou Qaj5 Pleistocene Qalo suggested alternative terminology (for example, Chamberlin and others, Ana fault and at west-northwest-trending fault zone in Qt4 Qt4 Qaj3 Qaj3 Ton o Qeso ? o o 1999; Pazzaglia and others, 1999; Tedford and Barghoorn, 1999). Qesy/Qalo Tou sec. 3 and 4, T. 14 N., R. 3 E., east of southern end of Qt3 Qt3 Qaj2 -- 70 o o 12 Qesy/Qalo 8 11 Qeso Qls Herein I retain some of the proposed stratigraphic revisions of the Santa prominent exposure of Santa Ana fault. Faulting and o 9 11 o Qaj4* Fe Group of Connell and others (1999) because the reference sections are poor exposure complicate estimation of unit thickness, Qt2 Qt2 -- Qaj1 o o 11 10 located nearby, but such usage should not be interpreted as an endorse- 1 4 14 o Qalo but exposed thickness probably <200 m Sources: Rogers (1996) and Rogers and Smartt (1996) Qesy Qaj3 ment of this stratigraphic terminology outside of the Santa Ana Pueblo Santa Fe Group, undivided (Pliocene(?) to Miocene)— 2Sources: Formento-Trigilio and Pazzaglia (1996, 1998), Formento-Trigilio (1997), o13 o 7 QUATERNARY Tsfu 62 17 85 o middle quadrangle Pazzaglia (1998), and Pazzaglia and others (1998) 60 SPT Sedimentary rocks correlative with Santa Fe Group, Tc o 5 3Source: Koning and Personius (2002) 8/27/97-1 Qeso 6 ? Pleistocene mapped where surface access was restricted in o 11 55 73 o Qaj2* Tc Cochiti Formation (Pliocene to upper Miocene)—Very Ton 75 southwestern part of quadrangle. Probably consists of 80 o 65 o pale brown, fine to coarse sandstone and sandy pebble, o o 8 Tc Loma Barbon Member of Arroyo Ojito Formation (unit o 65 Qcb 14o 12 17 11 63 o10 8 cobble, and local boulder conglomerate; poorly o Qaj1 Tou) east of Tamaya fault and Navajo Draw Member of 70 67 15 indurated; poorly to moderately well sorted. Massive to 8 Arroyo Ojito Formation (unit Ton) and Cerro Conejo Qesy ? moderately bedded. Clasts are subangular to subrounded 68 62 53 45 REFERENCES CITED o Tou Member of Zia Formation (unit Tzcc) west of Tamaya 55 75 ? 74 o and primarily consist of volcanic rocks derived from o *Unit located in adjacent fault. Thickness unknown 13 o 15 Bachman, G.O., and Mehnert, H.H., 1978, New K-Ar dates and the late Pliocene to Holocene o Bernalillo NW quadrangle lower Jemez Mountains to north; pumice-rich zones and 13 63 Qalo 10 geomorphic history of the central Rio Grande region, New Mexico: Geological Society of o18 7 Pleistocene obsidian clasts ("Apache tears") are common. A Zia Formation Ton 75 (Koning and Personius, 2002); America Bulletin, v. 89, p. 283–292. o 83 40 39 o Qcb see table 1 preliminary Ar/ Ar analysis on one pumice bed Tzcc Cerro Conejo Member of Connell and others (1999) Bailey, R.A., Smith, R.L., and Ross, C.S., 1969, Stratigraphic nomenclature of volcanic rocks 50 Qesy o 5 10 o (sample SPT9/15/97–4) yielded an age of 7.01±.06 Ma (Miocene)—Pale-brown to yellowish-red, fine- to in the Jemez Mountains, New Mexico: U.S. Geological Survey Bulletin 1274–P, 19 p. o 9 12 o o Birkeland, P.W., 1999, Soils and geomorphology, third edition: New York, Oxford University 62 10 Tb Tbc (M.J. Kunk, oral commun., 1999), indicating these medium-grained, parallel bedded sandstone; light-gray to 10 o Press, 430 p. o very pale brown, lithic-rich, fine- to coarse-grained eolian 8 75 Tb Pliocene tephra are probably reworked from Peralta Tuff (Bailey 65 13 75 11 ≈ crossbedded sandstone; and brown and red siltstone and Birkeland, P.W., Machette, M.N, and Haller, K.M., 1991, Soils as a tool for applied Quaternary 67 and others, 1969), which has been dated at 6.75–7.0 geology: Utah Geological and Mineral Survey Miscellaneous Publication 91–3, 63 p. 63 Tfr o o o Tc Tou claystone; unit weakly indurated. Sandstone is o 7 65 Ma elsewhere in the region (Smith and others, 1991; Black, B.A., and Hiss, W.L., 1974, Structure and stratigraphy in the vicinity of the Shell Oil Co. 16 o ? 55 7 Tc ? McIntosh and Quade, 1995). Sparse clast orientation moderately to well sorted; eolian crossbedded sandstone Santa Fe Pacific No. 1 test well, southern Sandoval County, New Mexico, in Siemers, C.T., 10 Tou 4 c 78 75 measurements indicate southerly (140˚–215˚) transport in large (1- to 2-m-high) sets; parallel bedded sandstone Woodward, L.A., and Callender, J.F., eds., Ghost Ranch: New Mexico Geological Society Qalo o th 13 75 5 Tb 25 Field Conference Guidebook, p. 365–370. o o 60 directions. Poor exposure prevents accurate determi- in beds 0.5–2 m thick, interbedded with rare thin (5–10 78 Bryan, Kirk, and McCann, F.T., 1937, The Ceja del Rio Puerco—A border feature of the Basin o8 8 Ton Tsfu nation of conglomerate-to-sandstone ratios, but cm) granule pebble gravel beds. Mudstones generally and Range Province in New Mexico, Part I, stratigraphy and structure: Journal of Geology, o o 11 Qalo o conglomerate probably makes up less than 10 percent of thin (2–20 cm), but some as much as 1–1.5 m thick. v. 45, p. 801–828. 56 16 8 lower section, and is greater than 70 percent in some One thin (≤10 cm), discontinuous ash bed is mapped in Cather, S.M., and Connell, S.D., 1998, Geology of the San Felipe Pueblo 7.5-minute o8 Qeso o places near upper part of section below rim of Santa footwall of Tamaya fault just north of Jemez River. quadrangle, Sandoval County, New Mexico: New Mexico Bureau of Mines and Mineral o 8 Santa Fe Group 13 Qaly Mapped as Chamisa Mesa member of Santa Fe Resources Open-File Geologic Map OF–GM 19, scale 1:24,000. Miocene Ana Mesa in better exposures north of Santa Ana Pueblo Chamberlin, R.M., Pazzaglia, F.J., Wegmann, K.W., and Smith, G.A., 1999, Preliminary Tzcc quadrangle. As mapped herein, unit is consistent with Formation by Soister (1952), as lower member of lower geologic map of Loma Creston quadrangle, Sandoval County, New Mexico: New Mexico o Tb 42 o redefinition of Cochiti Formation proposed by Smith and unnamed formation of Santa Fe Group by Spiegel Bureau of Mines and Mineral Resources Open-File Geologic Map OF–DM 25, scale 11 1:24,000. o o 67 11 Lavine (1996). Unit interfingers with northwest-derived (1961), as Santa Fe Formation by Smith and others Qesy 10 Tzcc 10 c sandstone and conglomerate of unit Tou; some beds of (1970), and as Zia member of Santa Fe Formation by Connell, S.D., Koning, D.J., and Cather, S.M., 1999, Revisions to the stratigraphic Tbc nomenclature of the Santa Fe Group, northwestern Albuquerque Basin, New Mexico, in unit Tou conglomerate are included in unit Tc. Kelley (1977). Probably correlative with unnamed Pazzaglia, F.J., and Lucas, S.G., eds., Albuquerque Geology: New Mexico Geological Tzcc Exposures are confined to northwest corner of Santa member of Zia Formation of Tedford (1982) and Tedford Society 50th Annual Field Conference Guidebook, p.
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