Despite the potential for the use of the Ogallala Formation as a constraint on the sedimentary response to uplift of the Southern Rocky Mountains during the Tertiary, primary age and provenance data for New Mexico Ogallala units are sparse. The current estimated depositional age of the southern Ogallala is between ~13 and 5 Ma based on vertebrate biochronology in the northeastern part of the Llano Estacado in west Texas. In an effort to improve the age constraints, detrital sanidine (DS) 40 Ar/ 39 Ar geochronology is utilized on samples from the western escarpment of the Llano Estacado and elsewhere in NM. Coupling DS age and associated K/Ca data (determined from measuring 39 Ar/ 37 Ar) and comparing this to age and K/Ca data of regional volcanic units allows estimates of maximum depositional age (MDA) and provenance. This information is utilized to better understand the evolution of the Pecos River system. DS data were determined from the Bridwell and Couch formations of the Ogallala Group near Lubbock, TX (samples courtesy of Dr. Tom Lehman). Based on biostratigraphy, the Bridwell formation is Hemphillian (10.3-4.9 Ma) and the Couch is Clarendonian (13.6-10.3 Ma). DS data yield an MDA of 6.77 Ma thus restricting the sampled interval of the Bridwell to no older than 6.77 Ma In contrast, the MDA of the Couch formation sample is 27.1 Ma with no Miocene DS grains detected. Four Miocene DS grains are found in samples from Mescalero Ridge in SE New Mexico and they provide an 11.44 MDA for Ogallala Formation in this area. The combined DS data and lithologic (eolian) similarities suggest that the Ogallala of SE New Mexico is correlative to the upper Couch Formation of west Texas. The 6-8 Ma youngest grains in the Bridwell formation indicate a New Mexico Peralta tuff source, whereas significant late Cretaceous DS grains are likely derived from reworked Cretaceous or younger sedimentary rocks. The 11.44 Ma DS grains from the Llano Estacado may be derived from Socorro area volcanics or perhaps much more distal Yellowstone Hotspot Track eruptions in Idaho, although long transport of sanidine is tephra is problematic. As a whole there are multiple DS ages between the Oligocene and Eocene that could reflect derivation from several regional volcanic fields. In detail, age and K/Ca data of Trans-Pecos volcanic field sanidines provide the best matches to some of the DS data, thereby implying an overall southern source for the Ogallala sediments. This coupled with paleocurrent data supports a north flowing paleo-Pecos river system that has been proposed by Cather (2011). Several samples from north-central New Mexico that are mapped as Ogallala yield Pleistocene DS ages with grains likely sourced from Valles Caldera eruptions. The young ages demonstrate the difficulty of correctly mapping the Ogallala and suggest that these units are likely either the Blackwater Draw or Blanco formation.
{"title":"40Ar/ 39Ar Detrital Sanidine Dating of the Ogallala Formation in Southeastern New Mexico and West Texas","authors":"Kevin Henry, M. Heizler, Steve T. Cather","doi":"10.56577/sm-2017.534","DOIUrl":"https://doi.org/10.56577/sm-2017.534","url":null,"abstract":"Despite the potential for the use of the Ogallala Formation as a constraint on the sedimentary response to uplift of the Southern Rocky Mountains during the Tertiary, primary age and provenance data for New Mexico Ogallala units are sparse. The current estimated depositional age of the southern Ogallala is between ~13 and 5 Ma based on vertebrate biochronology in the northeastern part of the Llano Estacado in west Texas. In an effort to improve the age constraints, detrital sanidine (DS) 40 Ar/ 39 Ar geochronology is utilized on samples from the western escarpment of the Llano Estacado and elsewhere in NM. Coupling DS age and associated K/Ca data (determined from measuring 39 Ar/ 37 Ar) and comparing this to age and K/Ca data of regional volcanic units allows estimates of maximum depositional age (MDA) and provenance. This information is utilized to better understand the evolution of the Pecos River system. DS data were determined from the Bridwell and Couch formations of the Ogallala Group near Lubbock, TX (samples courtesy of Dr. Tom Lehman). Based on biostratigraphy, the Bridwell formation is Hemphillian (10.3-4.9 Ma) and the Couch is Clarendonian (13.6-10.3 Ma). DS data yield an MDA of 6.77 Ma thus restricting the sampled interval of the Bridwell to no older than 6.77 Ma In contrast, the MDA of the Couch formation sample is 27.1 Ma with no Miocene DS grains detected. Four Miocene DS grains are found in samples from Mescalero Ridge in SE New Mexico and they provide an 11.44 MDA for Ogallala Formation in this area. The combined DS data and lithologic (eolian) similarities suggest that the Ogallala of SE New Mexico is correlative to the upper Couch Formation of west Texas. The 6-8 Ma youngest grains in the Bridwell formation indicate a New Mexico Peralta tuff source, whereas significant late Cretaceous DS grains are likely derived from reworked Cretaceous or younger sedimentary rocks. The 11.44 Ma DS grains from the Llano Estacado may be derived from Socorro area volcanics or perhaps much more distal Yellowstone Hotspot Track eruptions in Idaho, although long transport of sanidine is tephra is problematic. As a whole there are multiple DS ages between the Oligocene and Eocene that could reflect derivation from several regional volcanic fields. In detail, age and K/Ca data of Trans-Pecos volcanic field sanidines provide the best matches to some of the DS data, thereby implying an overall southern source for the Ogallala sediments. This coupled with paleocurrent data supports a north flowing paleo-Pecos river system that has been proposed by Cather (2011). Several samples from north-central New Mexico that are mapped as Ogallala yield Pleistocene DS ages with grains likely sourced from Valles Caldera eruptions. The young ages demonstrate the difficulty of correctly mapping the Ogallala and suggest that these units are likely either the Blackwater Draw or Blanco formation.","PeriodicalId":192881,"journal":{"name":"Proceedings Volume: \"Uranium in New Mexico: the Resource and the Legacy\", New Mexico Geological Society, 2017 Annual Spring Meeting","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133853354","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":"Uranium Industry: Overview","authors":"Bernard Bonifas","doi":"10.56577/sm-2017.500","DOIUrl":"https://doi.org/10.56577/sm-2017.500","url":null,"abstract":"","PeriodicalId":192881,"journal":{"name":"Proceedings Volume: \"Uranium in New Mexico: the Resource and the Legacy\", New Mexico Geological Society, 2017 Annual Spring Meeting","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116354381","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}
Ryan Dunagin, M. Roy, S. Kelley, L. Worthington, J. Butts
{"title":"What Lies Beneath the Dunes? Gravity Measurements to Characterize Sub-Surface Density Structure and Understand Controls on Dune Migration in White Sands National Monument, New Mexico","authors":"Ryan Dunagin, M. Roy, S. Kelley, L. Worthington, J. Butts","doi":"10.56577/sm-2017.520","DOIUrl":"https://doi.org/10.56577/sm-2017.520","url":null,"abstract":"","PeriodicalId":192881,"journal":{"name":"Proceedings Volume: \"Uranium in New Mexico: the Resource and the Legacy\", New Mexico Geological Society, 2017 Annual Spring Meeting","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131760067","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}
Kenneth L. Mckeighen, Kendra R. McKeighen, H. W. Mckeighen, S. Lucas
We add to the growing record of Dimetrodon fossils from the Lower Permian Abo Formation in New Mexico with the addition of a potential new species from the Gallina Well locality in Socorro County that previously yielded other material of Dimetrodon in 2010. During a visit to the site in 2014, one of us (KLM Jr.) collected a large vertebra and associated fragments including a 15 cm long neural spine. The neural spine morphology of this specimen is of the more primitive round cross section, most similar to Dimetrodon milleri , the oldest known Dimetrodon from Texas. A significant difference is larger size being at least 50% larger than D. milleri . We also see a temporal difference with the Gallina Well Dimetrodon being late Asselian or early Sakmarian in age and D. milleri being younger in the Sakmarian. The Discovery of this specimen raises several important questions. The first relates to size of early Dimetrodon species. Until the discovery of this specimen all known early Dimetrodon were small. Indeed, all early species, cf. D. milleri from the middle Asselian of New Mexico, D. occidentalis from the upper Asselian of New Mexico, and D. milleri from the Sakmarian of Texas, are all small species. This was thought advantageous to life in an inland and upland habitat, and that larger size arose to take advantage of deltaic habitats. The new species from Gallina Well demonstrates that larger size arose much earlier than previous thought. The diversity of Dimetrodon is also in question with regard to how many species were there in New Mexico deposits. The new Gallina Well Dimetrodon suggest the presence of two contemporaneous species in the Abo Formation. Research since 2009 has revealed Dimetrodon to be a more common, though not the dominant predator, on the Abo floodplains of Permian New Mexico. Much more research is needed to fully understand Dimetrodon from the Lower Permian of New Mexico.
{"title":"A Possible New Species of Dimetrodon (Eupelycosauria: Sphenacodontidae) from the Lower Permian Abo Formation, Socorro County, New Mexico","authors":"Kenneth L. Mckeighen, Kendra R. McKeighen, H. W. Mckeighen, S. Lucas","doi":"10.56577/sm-2017.495","DOIUrl":"https://doi.org/10.56577/sm-2017.495","url":null,"abstract":"We add to the growing record of Dimetrodon fossils from the Lower Permian Abo Formation in New Mexico with the addition of a potential new species from the Gallina Well locality in Socorro County that previously yielded other material of Dimetrodon in 2010. During a visit to the site in 2014, one of us (KLM Jr.) collected a large vertebra and associated fragments including a 15 cm long neural spine. The neural spine morphology of this specimen is of the more primitive round cross section, most similar to Dimetrodon milleri , the oldest known Dimetrodon from Texas. A significant difference is larger size being at least 50% larger than D. milleri . We also see a temporal difference with the Gallina Well Dimetrodon being late Asselian or early Sakmarian in age and D. milleri being younger in the Sakmarian. The Discovery of this specimen raises several important questions. The first relates to size of early Dimetrodon species. Until the discovery of this specimen all known early Dimetrodon were small. Indeed, all early species, cf. D. milleri from the middle Asselian of New Mexico, D. occidentalis from the upper Asselian of New Mexico, and D. milleri from the Sakmarian of Texas, are all small species. This was thought advantageous to life in an inland and upland habitat, and that larger size arose to take advantage of deltaic habitats. The new species from Gallina Well demonstrates that larger size arose much earlier than previous thought. The diversity of Dimetrodon is also in question with regard to how many species were there in New Mexico deposits. The new Gallina Well Dimetrodon suggest the presence of two contemporaneous species in the Abo Formation. Research since 2009 has revealed Dimetrodon to be a more common, though not the dominant predator, on the Abo floodplains of Permian New Mexico. Much more research is needed to fully understand Dimetrodon from the Lower Permian of New Mexico.","PeriodicalId":192881,"journal":{"name":"Proceedings Volume: \"Uranium in New Mexico: the Resource and the Legacy\", New Mexico Geological Society, 2017 Annual Spring Meeting","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128658863","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}
Beginning in the spring of 2015, a team of New Mexico Highlands University (NMHU) faculty and students began developing a series of curriculum modules to teach various practices for delineating watersheds, collecting field data, and exploring watershed features using desktop and online geographic information systems. This work was funded as part of New Mexico EPSCoR’s Western Consortium, Watershed Analysis, Visualization, and Exploration (WC-WAVE), Undergraduate Visualization and Modeling Network (UVMN). In the first phase of the project, curriculum for delineating watersheds from 30-meter, 10-meter, and lidar-derived 0.3-meter resolution digital elevation models was developed. The Environmental Protection Agency’s BASINS software is used. A users’ guide for field data collection with Avenza’s PDF Maps applications was also developed. A suite of camera equipment and accessories was obtained to help enhance field data collection using “gigapan” photography. In the continuation phase of the project, NMHU is developing an Introduction to Geographic Information Systems module. This module is being supported with exercises in using ESRI’s ArcGIS Online platform to explore and create web maps, create Story Maps, and collect field data using ESRI’s Collector for ArcGIS app. A unique aspect of this project was the establishment of a “co-learning” environment among students and faculty. Students were assigned to develop specific modules and were then expected to teach their faculty mentors what they had learned. Modules from the first phase of the project are already being used in various NMHU courses. Modules from the continuation phase are being piloted at NMHU this spring and will be incorporated in a course being conducted this summer at nearby Rio Mora National Wildlife Refuge by the Community College of Denver. The Denver Zoo at Rio Mora National Wildlife Refuge is also adopting the curriculum for use in various courses and workshops they will offer. All curriculum will be made available on the New Mexico Forest and Watershed Health Clearinghouse, allaboutwatersheds.org.
从2015年春天开始，新墨西哥高地大学(NMHU)的一个教师和学生团队开始开发一系列课程模块，教授使用桌面和在线地理信息系统划定流域、收集实地数据和探索流域特征的各种实践。这项工作是新墨西哥EPSCoR西部联盟、流域分析、可视化和探索(WC-WAVE)、本科可视化和建模网络(UVMN)的一部分。在项目的第一阶段，开发了从30米、10米和激光雷达衍生的0.3米分辨率数字高程模型中划定流域的课程。使用的是美国环境保护局(Environmental Protection Agency)的basin软件。还开发了使用Avenza的PDF地图应用程序收集现场数据的用户指南。获得了一套摄影设备和附件，以帮助加强使用“gigapan”摄影的现场数据收集。在该项目的继续阶段，NMHU正在开发地理信息系统导论模块。该模块将使用ESRI的ArcGIS在线平台来探索和创建网络地图，创建故事地图，并使用ESRI的Collector for ArcGIS应用程序收集现场数据。该项目的一个独特之处在于在学生和教师之间建立了一个“共同学习”的环境。学生们被分配去开发特定的模块，然后把他们所学到的教给他们的导师。项目第一阶段的模块已经在各种NMHU课程中使用。延续阶段的模块将于今年春天在NMHU进行试点，并将被纳入丹佛社区学院今年夏天在附近的里奥莫拉国家野生动物保护区开展的课程。里奥莫拉国家野生动物保护区的丹佛动物园也将采用该课程，用于他们将提供的各种课程和讲习班。所有课程将在新墨西哥森林和流域健康信息交换所提供，allaboutatersheds.org。
{"title":"A Multi-Scale Visualization and Exploration of the Mora Watershed, New Mexico","authors":"J. Zebrowski, P. Dappen, A. Sánchez","doi":"10.56577/sm-2017.498","DOIUrl":"https://doi.org/10.56577/sm-2017.498","url":null,"abstract":"Beginning in the spring of 2015, a team of New Mexico Highlands University (NMHU) faculty and students began developing a series of curriculum modules to teach various practices for delineating watersheds, collecting field data, and exploring watershed features using desktop and online geographic information systems. This work was funded as part of New Mexico EPSCoR’s Western Consortium, Watershed Analysis, Visualization, and Exploration (WC-WAVE), Undergraduate Visualization and Modeling Network (UVMN). In the first phase of the project, curriculum for delineating watersheds from 30-meter, 10-meter, and lidar-derived 0.3-meter resolution digital elevation models was developed. The Environmental Protection Agency’s BASINS software is used. A users’ guide for field data collection with Avenza’s PDF Maps applications was also developed. A suite of camera equipment and accessories was obtained to help enhance field data collection using “gigapan” photography. In the continuation phase of the project, NMHU is developing an Introduction to Geographic Information Systems module. This module is being supported with exercises in using ESRI’s ArcGIS Online platform to explore and create web maps, create Story Maps, and collect field data using ESRI’s Collector for ArcGIS app. A unique aspect of this project was the establishment of a “co-learning” environment among students and faculty. Students were assigned to develop specific modules and were then expected to teach their faculty mentors what they had learned. Modules from the first phase of the project are already being used in various NMHU courses. Modules from the continuation phase are being piloted at NMHU this spring and will be incorporated in a course being conducted this summer at nearby Rio Mora National Wildlife Refuge by the Community College of Denver. The Denver Zoo at Rio Mora National Wildlife Refuge is also adopting the curriculum for use in various courses and workshops they will offer. All curriculum will be made available on the New Mexico Forest and Watershed Health Clearinghouse, allaboutwatersheds.org.","PeriodicalId":192881,"journal":{"name":"Proceedings Volume: \"Uranium in New Mexico: the Resource and the Legacy\", New Mexico Geological Society, 2017 Annual Spring Meeting","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125899038","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":"Major Elements, Trace Elements, and Sr, Nd, and Pb Isotopes of Whole Rocks From the Doña Ana Mountains: Identifying Potential Connections Between Caldera-Related Igneous Rocks in South-Central New Mexico","authors":"Tyler Askin, F. Ramos, P. Stevens","doi":"10.56577/sm-2017.545","DOIUrl":"https://doi.org/10.56577/sm-2017.545","url":null,"abstract":"","PeriodicalId":192881,"journal":{"name":"Proceedings Volume: \"Uranium in New Mexico: the Resource and the Legacy\", New Mexico Geological Society, 2017 Annual Spring Meeting","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121801598","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}
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