New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume最新文献_第5页

Stratigraphic changes across an intrabasinal fault, Kasha-Katuwe Tent Rocks National Monument, New Mexico 新墨西哥州卡沙-卡图韦帐篷岩国家纪念地基底内断层的地层变化

New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume Pub Date : 2006-04-21 DOI: 10.56577/sm-2006.957

G. A. Smith

引用次数: 0

Turonian ammonites from the type area of the Juana Lopez Member of the Mancos Shale, Santa Fe County, New Mexico 新墨西哥州圣达菲县曼科斯页岩胡安娜洛佩斯段类型区的土伦菊石

New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume Pub Date : 2006-04-21 DOI: 10.56577/sm-2006.973

P. Sealey, S. Lucas

{"title":"Turonian ammonites from the type area of the Juana Lopez Member of the Mancos Shale, Santa Fe County, New Mexico","authors":"P. Sealey, S. Lucas","doi":"10.56577/sm-2006.973","DOIUrl":"https://doi.org/10.56577/sm-2006.973","url":null,"abstract":"At the type section of the Juana Lopez Member of the Mancos Shale at Galisteo Dam in central New Mexico, the unit is approximately 33 m thick and consists of three lithostratigraphic intervals--lower calcarenites, a middle shale and upper calcarenites. It is underlain by the Carlile Shale and overlain by the D-Cross Member of the Mancos Shale. The ammonite fauna includes Scaphites whitfieldi Cobban, Prionocyclus novimexicanus (Marcou), Prionocyclus wyomingensis Meek, Prionocyclus macombi Meek, Scaphites warreni Meek and Hayden and Coilopoceras colleti Hyatt. Most of the ammonite diversity in the Juana Lopez Member at Galisteo Dam is in the upper calcarenite interval and is dominated by P. novimexicanus , S. whitfieldi and S. warreni with an occasional P. wyomingensis . The middle shale interval has a low diversity ammonite assemblage dominated by P. macombi with an occasional C. colleti . The Juana Lopez Member encompasses three widely recognized Turonian ammonite zones, the P. macombi , P. wyomingensis and P. novimexicanus zones. The P. macombi Zone also occurs in many other places in New Mexico, including the basal part of the Juana Lopez Member in Colfax County where the lectotype of P. macombi was collected. In New Mexico, the P. wyomingensis Zone occurs in the Juana Lopez and D-Cross Members. The zone of P. novimexicanus also occurs in various New Mexico locations, especially in the D-Cross Member of the Mancos Shale. The P. macombi and P. wyomingensis Zones are of late-middle Turonian age, whereas the P. novimexicanus Zone is of late Turonian","PeriodicalId":203318,"journal":{"name":"New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume","volume":"22 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133754245","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}

引用次数: 0

First record of the arthropod trace fossil Cruziana Problemtica from the Lower Permian Abo Formation, Cerros de Amado, Socorro County, New Mexico 节肢动物化石Cruziana Problemtica的第一个记录来自新墨西哥州索科罗县塞罗斯德阿马多的下二叠纪Abo组

New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume Pub Date : 2006-04-21 DOI: 10.56577/sm-2006.971

A. J. Lerner, S. Lucas

引用次数: 0

Rock watching along the Canyon Trail, Bosque del Apache National Wildlife Refuge-A pictorial guide to Neogene landscape evolution in central New Mexico 在博斯克德尔阿帕奇国家野生动物保护区的峡谷小径上观赏岩石——新墨西哥州中部新近纪景观演变的图片指南

New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume Pub Date : 2006-04-21 DOI: 10.56577/sm-2006.980

R. Chamberlin, D. W. Love, L. Peters

{"title":"Rock watching along the Canyon Trail, Bosque del Apache National Wildlife Refuge-A pictorial guide to Neogene landscape evolution in central New Mexico","authors":"R. Chamberlin, D. W. Love, L. Peters","doi":"10.56577/sm-2006.980","DOIUrl":"https://doi.org/10.56577/sm-2006.980","url":null,"abstract":"Recent geologic mapping and paleocurrent observations indicate that interbedded volcanic-rich conglomerates and cross-bedded eolian sandstones exposed along the Canyon Trail predate the Rio Grande and mark the time \"before a river ran through it\". Equivalent volcanic-rich conglomerates NW of the Bosque Visitors Center are overlain by a basaltic lava flow that yields a 40Ar/ 39Ar age of 8.57 ± 0.26 Ma; they are therefore assigned to the Miocene Popotosa Formation of the lower Santa Fe Group. Pebble imbrications and clast compositions in the cobbly conglomerates indicate paleocurrents to the WSW (250 ± 45º, n=14); whereas maximum dip directions (>25-35º) in the coeval eolian sandstones show prevailing wind directions toward the ENE (080± 30º, n = 23). In late Miocene time, about 9-10 Ma, the Little San Pascual Mountains (east of the Canyon Trail) must have been a prominent fault block range capped by a thick volcanic pile overlying the Permian Abo Formation. Mountain streams carried the volcanic-rich gravels and rare Abo siltstone clasts westward toward a basin floor. At the same time strong westerly winds carried fine sand eastward across the toes of the alluvial fans. Minor mudstone drapes found where conglomerate beds overlie eolian sandstones probably mark small marshlands formed at the toe of alluvial fans, on the lee (mountainward) sides of the dunes. The Ibex Dunes, in the Death Valley region of Southern California, are considered to be a modern analogue for the Canyon Trail area in late Miocene time. Remnants of east transported piedmont-slope gravels (early? Pleistocene) disconformably overlie the Popotosa conglomerates where they are locally preserved on the downthrown side of the NNW-striking Solitude fault, which transects the Canyon Trail.","PeriodicalId":203318,"journal":{"name":"New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133696007","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}

引用次数: 2

Preliminary age of mammal footprints in Pleistocene lake-margin sediments of the Tularosa Basin, south-central New Mexico 新墨西哥州中南部图拉罗萨盆地更新世湖缘沉积物中哺乳动物脚印的初步年代

New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume Pub Date : 2006-04-21 DOI: 10.56577/sm-2006.970

B. Allen, D. W. Love, R. Myers

{"title":"Preliminary age of mammal footprints in Pleistocene lake-margin sediments of the Tularosa Basin, south-central New Mexico","authors":"B. Allen, D. W. Love, R. Myers","doi":"10.56577/sm-2006.970","DOIUrl":"https://doi.org/10.56577/sm-2006.970","url":null,"abstract":"Fossil footprints, thought to represent underprints of Rancholabrean proboscideans and camelids, have previously been documented in Pleistocene lakebeds on the floor of the Tularosa Basin. Here we present preliminary results from radiocarbon chronology of associated deposits. The originally documented tracksite is located along the northwest side of the lake basin, about 20 km north of Lake Lucero on the west side of Alkali Flat. The footprints are weathering out of the lowermost exposures of lacustrine beds and similar features can be found at the same general stratigraphic level over a distance of at least a few kilometers parallel to shore. Basal exposures of the lacustrine sequence along the northeast side of Alkali Flat have also been identified that are stratigraphically equivalent to the western-margin track-bearing beds. Lithofacies in the track-bearing deposits include beds of gypsiferous clay, laminated and massive gypsum, carbonate mud, and thin beds containing abundant fragments of aquatic macrophytes. Lithofacies, sedimentary structures, fossil algal mats, and the preservation of aquatic organisms in some beds are consistent with subaqueous deposition and periodic subaerial exposure along the margin of a shallow saline lake. Three samples of aquatic macrophyte fragments from the level of the tracks have yielded radiocarbon ages slightly greater than 31,000 14C yrs B.P. Accuracy of these ages is uncertain because contamination of samples of this antiquity with small amounts of modern carbon would cause the apparent ages to be significantly too young. The track beds are overlain unconformably by sediments containing a relative abundance of siliciclastics and diverse assemblages of ostracode and other aquatic organisms, suggesting input of sediment-laden surface water and relative freshening of the lake. These overlying deposits have yielded four radiocarbon ages from ostracodes valves, aquatic macrophytes, and charcoal ranging from 22,800 to 19,430 14C yrs B","PeriodicalId":203318,"journal":{"name":"New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132614262","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}

引用次数: 3

An envirnmental magnetism investigation of the Pleistocene lacustrine sediments from the Valle Grande, New Mexico 新墨西哥州格兰德河谷更新世湖泊沉积物环境磁学研究

New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume Pub Date : 2006-04-21 DOI: 10.56577/sm-2006.983

L. Donohoo-Hurley, J. Geissman, P. Fawcett, T. Wawrzyniec, F. Goff

{"title":"An envirnmental magnetism investigation of the Pleistocene lacustrine sediments from the Valle Grande, New Mexico","authors":"L. Donohoo-Hurley, J. Geissman, P. Fawcett, T. Wawrzyniec, F. Goff","doi":"10.56577/sm-2006.983","DOIUrl":"https://doi.org/10.56577/sm-2006.983","url":null,"abstract":"Environmental magnetic data are being obtained from over 80m of Pleistocene age lacustrine sediments (core GLAD-VC3-04) retrieved in 2004 from the Valles Caldera, New Mexico. The purpose of this study is to asses past climate variation within the Valles Caldera over the time period of sedimentation by quantifying variations in magnetic mineralogy as a proxy for changes in sediment influx resulting from climatically driven surficial processes. Typical intensities of natural remanent magnetization (NRM) of VC3-04 range from 3 - 6 mA/m. Intensities of anhysteretic remanent magnetization (ARM) that reflect total magnetite population, range from 15 - 30 mA/m. Results of alternating field demagnetization and other rock magnetic tests indicate that fine grained magnetite (single-domain and pseudo-single domain magnetite) carries the principal magnetization signal in much of the section. The VC3-04 core is not oriented and thus paleomagnetic evaluation of the NRM is limited to inclination values. The oldest part of the VC304 core is about 552 + 3 ka, based on 40Ar/39Ar isotopic age determination on sanidine in a tephra layer at 76.4m depth and thus the entire core is within the current Brunhes chron. Although this chron is exclusively of normal polarity, several geomagnetic “events” reflecting short-lived high amplitude directional deviations in the geomagnetic field (e.g., the Calabrian Ridge II at 515 +/- 3 ka) have been documented for the Brunhes chron. Samples obtained from the depth interval 17.22 m - 17.30 m yield moderate negative inclinations, which we interpret represent the Calabrian Ridge II event.","PeriodicalId":203318,"journal":{"name":"New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121017105","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}

引用次数: 0

Stratigraphy and structure of the southern Espanola Basin, New Mexico 新墨西哥州埃斯帕诺拉盆地南部地层学与构造

New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume Pub Date : 2006-04-21 DOI: 10.56577/sm-2006.976

D. Koning, P. Johnson, A. Read, V. Grauch, S. Minor

引用次数: 0

Paleoecology of the aqueous paleoenvironments of the Late Cretaceous (Early Campanian) Allison Member of the Menefee Formation in northwestern New Mexico 新墨西哥州西北部晚白垩世(早坎帕尼亚期)Menefee组Allison段水环境古生态学

New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume Pub Date : 2006-04-21 DOI: 10.56577/sm-2006.945

C. Lewis, A. Heckert, M. Foryś

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A Mid-Pleistocene glacial-interglacial cycle from the Valles Caldera, New Mexico 新墨西哥州山谷破火山口的中更新世冰期-间冰期旋回

New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume Pub Date : 2006-04-21 DOI: 10.56577/sm-2006.951

P. Fawcett, J. Heikoop, R. S. Anderson, L. Donohoo-Hurley, J. W. Geisman, C. Johnson, C. Allen, G. Woldegabriel, J. Fesenden-Rahn, F. Goff

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Constraints on Laramide shortening and Rio Grande rift extension in the Franklin Mountains, West Texas and southern New Mexico 德克萨斯州西部和新墨西哥州南部富兰克林山脉拉腊米缩短和里奥格兰德裂谷扩展的制约因素

New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume Pub Date : 2006-04-21 DOI: 10.56577/sm-2006.978

M. Scharman, C. Andronicos, G. R. Keller, Jr. Hurtado J. M., A. A. Velasco

{"title":"Constraints on Laramide shortening and Rio Grande rift extension in the Franklin Mountains, West Texas and southern New Mexico","authors":"M. Scharman, C. Andronicos, G. R. Keller, Jr. Hurtado J. M., A. A. Velasco","doi":"10.56577/sm-2006.978","DOIUrl":"https://doi.org/10.56577/sm-2006.978","url":null,"abstract":"The Franklin Mountains in west Texas and southern New Mexico contain geologic structures associated with Laramide shortening and Rio Grande rift extension. Laramide shortening affected west Texas and southern New Mexico from late Cretaceous to early Tertiary time, while Rio Grande rift extension began in mid-Tertiary time. Thin-skinned, basement-cored folding, and transpressional tectonic models have been suggested for Laramide deformation, among others. However, a general agreement has not been reached on a single tectonic model. Micro-and macro-structural observations of fault system geometries, kinematics, and dynamics must be completed to provide constraints on tectonic and geologic models for Laramide shortening and Rio Grande Rift extension in west Texas and southern New Mexico. Detailed geologic mapping has been completed in the area of Tom Mays Park, Texas in order to refine the geologic structures and construct better cross-sections in the central Franklin Mountains. Measurements of fault orientations and associated lineations were also collected, which will be used for fault slip analysis of the faults in order to determine principle stress orientations for different periods of deformation present in the region.","PeriodicalId":203318,"journal":{"name":"New Mexico Geological Society, 2006 Annual Spring Meeting, Proceedings Volume","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132053632","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}

引用次数: 0