New Mexico Geology最新文献

{"title":"Electrical resistivity surveys of anthropogenic karst phenomena, southeastern New Mexico","authors":"G. Veni, Pecos River, Lake Avalon","doi":"10.58799/nmg-v34n4.117","DOIUrl":"https://doi.org/10.58799/nmg-v34n4.117","url":null,"abstract":"A small but significant number of sinkholes and other karst phenomena in southeastern New Mexico are of human origin and are often associated with solution mining of salt beds in the shallow subsurface. In 2008 two brine wells in a sparsely populated area of northern Eddy County, New Mexico, abruptly collapsed as a result of solution mining operations. The well operators had been injecting fresh water into underlying salt beds and pumping out brine for use as oil field drilling fluid. A third brine well within the city limits of Carlsbad, New Mexico, has been shut down to forestall possible sinkhole development in this more densely populated area. Electrical resistivity surveys conducted over the site of the brine well confirm the presence of a large, brine-filled cavity beneath the we0llhead. Laterally extensive zones of low resistivity beneath the well site represent either open cavities and conduits caused by solution mining or highly fractured and/or brecciated, brine-saturated intervals that may have formed by sagging and collapse into underlying cavities. The data also indicate that significant upward stoping has occurred into overlying strata.","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71175690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution of the Late Cretaceous oyster genus Cameleolopha Vyalov 1936 in central New Mexico","authors":"S. Hook, W. A. Cobban, T. Ranch, L. Vegas, S. Fe, Bull Gap Canyon, White Oaks Canyon","doi":"10.58799/nmg-v34n3.76","DOIUrl":"https://doi.org/10.58799/nmg-v34n3.76","url":null,"abstract":"A stratigraphic sequence of middle Turonian rocks, 35 ft (11 m) thick, in Lincoln County, New Mexico, contains a record of oyster evolution unique in the Western Interior. There, four stratigraphically distinct species of the ribbed oyster Cameleolopha show clearly the morphological changes that led from a freelying ancestral species to the attached oyster that marks the end of the lineage. The oldest species, referred to C. aff. C. bellaplicata, is a small, densely ribbed, planar morpho-type that is confined to the Prionocyclus hyatti Zone. It gives rise through a transitional form to the medium-sized, more coarsely ribbed, planoconvex C. bellaplicata. Cameleolopha bellaplicata is an important guide fossil in the Four Corners states and Texas to the upper part of the P. hyatti Zone through the middle part of the overlying P. macombi Zone. Cameleolopha bellaplicata gives rise to C. lugubris through a reduction in size, an increase in rib density, and a change in mode of life from free lying to attached, but not encrusting. Cameleolopha lugubris, which has the greatest geographic range of the group, is a well-known guide fossil throughout the Western Interior to the upper part of the P. macombi Zone through at least the overlying P. wyomingensis Zone.","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71175634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Terrain factors in Capitan recharge, northeastern Guadalupe escarpment, New Mexico","authors":"S. Rice-Snow, James R. Goodbar","doi":"10.58799/nmg-v34n1.15","DOIUrl":"https://doi.org/10.58799/nmg-v34n1.15","url":null,"abstract":"","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71175085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"100 years of volcano monitoring in the United States","authors":"J. Love","doi":"10.58799/nmg-v34n1.14","DOIUrl":"https://doi.org/10.58799/nmg-v34n1.14","url":null,"abstract":"","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71175028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New optical age of the Mescalero sand sheet, southeastern New Mexico","authors":"S. Hall, R. Goble","doi":"10.58799/nmg-v33n1.9","DOIUrl":"https://doi.org/10.58799/nmg-v33n1.9","url":null,"abstract":"The Mescalero sand sheet that covers most of the Mescalero Plain is formed by two eolian sand bodies, the Lower and Upper units. New and revised OSL ages indicate that the Lower unit accumulated 90–50 ka and the Upper unit was deposited 18–5 ka. Both eolian units are dominated by massive, well-sorted, fine quartz sand. The Lower sand directly overlies the eroded surface of the calcic Mescalero paleosol. The top of the Lower sand incorporates the Berino paleosol, a red argillic soil that formed on the sand sheet during the comparatively wet and cool environment of the late Wisconsinan. The Lower sand and the Berino paleosol are buried by the Upper eolian sand. An unnamed Bw paleosol at the top of the Upper sand formed during the past 5 ka. Locally, archaeological sites younger than 3,000 b.c. are on the surface, whereas older sites are buried within the Upper sand. During the twentieth century, the shrub grassland vegetation of the Mescalero sand sheet was disturbed, leading to the formation of many coppice and parabolic dunes.","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71175230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In memory of William R. Muehlberger","authors":"P. Bauer","doi":"10.58799/nmg-v33n4.126","DOIUrl":"https://doi.org/10.58799/nmg-v33n4.126","url":null,"abstract":"","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71175282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paleomagnetic and geochemical data from the late Miocene Lobato Formation adjacent to the Santa Clara fault system, Chili quadrangle, Rio Arriba County, New Mexico","authors":"M. Petronis, J. Lindline","doi":"10.58799/nmg-v33n2.27","DOIUrl":"https://doi.org/10.58799/nmg-v33n2.27","url":null,"abstract":"New paleomagnetic and petrologic data from late Miocene volcanic rocks in the northern Espanola Basin of north-central New Mexico help constrain the late Tertiary tectonic history and landscape development of the area. We studied a 100-m-thick (328-ft-thick) section of the ~ 10 Ma Lobato Formation in Arroyo de la Plaza Larga, an east-trending drainage in the northeastern Jemez Mountains. The Lobato Formation represents some of the earliest precaldera mafic volcanism associated with the Jemez Mountain volcanic field and coincides with an episode of crustal extension in the Espanola Basin. At Arroyo de la Plaza Larga, Lobato Formation flows are subhorizontal for nearly 2 km (1.25 mi) southeast from their eruptive source in the Cerro Roman volcanic center. These flows take on a monoclinal geometry with an apparent northeast-trending fold axis where they flow over an erosional escarpment adjacent to the Santa Clara fault, a prominent northeast-striking structure along the western part of the Espanola Basin. Here we show that the apparent monocline is not of a structural origin but formed due to lava flow emplacement down an escarpment formed by displacement along the Santa Clara fault. One hundred thirty-four oriented samples were collected for paleomagnetic analysis from 16 sites from the hinge zone and east limb of the apparent monocline. Paleomagnetic data reveal a single-component magnetization that decays to the origin with less than 10% of the natural remanent magnetization remaining after treatment in 120 mT fields. In situ results from sites located in the hinge zone and those from the east fold limb yield statistically indistinguishable remanence directions. Following structural correction, based on the strike and dip of the individual flows, the dispersion between the two data sets increased, indicating failure of the fold test at the 95% confidence level. We argue that the Lobato Formation basalts from Cerro Roman were emplaced into a paleovalley of considerable relief adjacent to the Santa Clara fault and that during the late Miocene, it was an active structure that influenced the topography and drainage systems of the western margin of the Rio Grande rift.","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71175411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gallery of Geology - The basalt of Broken Tank: an aphyric, ophitic basalt of the Rio Grande rift","authors":"R. Chamberlin","doi":"10.58799/nmg-v33n2.40","DOIUrl":"https://doi.org/10.58799/nmg-v33n2.40","url":null,"abstract":"The photomicrograph below was made from a thin section of the “basalt of Broken Tank” (Chamberlin et al. 2002), a distinctive aphyric ophitic basalt in the Socorro, New Mexico, region of the Rio Grande rift. Geologic and chronologic data indicate the basalt of Broken Tank was erupted onto a gravelly piedmont slope near San Antonio about 8.5 m.y. ago and then flowed 12 mi northward into an intermittent lake basin (playa) near Socorro. Where interbedded in playa muds, the same 8.5 Ma ophitic basalt was initially called the “basalt of Bear Canyon” (Osburn and Chapin 1983), a formation name now abandoned (Chamberlin et al. 2002).","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71175003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geomorphology, hydrology, and alluvial stratigraphy in lower Chaco Canyon do not support the possible existence of prehistoric sand-dammed ephemeral lakes","authors":"D. Love, M. Gillam, L. Benson, R. Friedman, P. Miller, K. Vincent","doi":"10.58799/nmg-v33n4.107","DOIUrl":"https://doi.org/10.58799/nmg-v33n4.107","url":null,"abstract":"Sand dunes 1–5 m high accumulate on the downwind side of the confluence where Chaco Wash and Escavada Wash form the broad, braided, sandy Chaco River at the northwest end of Chaco Canyon. Sand dunes derived by reworking channel sands are common next to the river and washes. Recently Force et al. (2002) and Force (2004) proposed that a similar set of sand dunes dammed Chaco Wash during Pueblo II occupation (a.d. 900–1150) of Chaco Canyon, forming a small lake. The dynamic geomorphology of the sand dunes and canyon floor, the hydrology of Chaco Wash, and stratigraphic analyses of the locality where lake beds were thought to exist all nullify the hypothesis. The sand dunes at the canyon mouth and nearby have changed in historic time, so it is likely that the configuration of dunes has changed during the past thousand years. To create a set of dunes across the entire mouth of Chaco Canyon requires that sand be trans","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71175124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gallery of Geology - Cretaceous fossil fish from New Mexico?","authors":"S. Lucas, Robert N. Sullivan","doi":"10.58799/nmg-v33n4.124","DOIUrl":"https://doi.org/10.58799/nmg-v33n4.124","url":null,"abstract":"","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71175193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}