{"title":"40AR/39AR K-FELDSPAR THERMOCHRONOLOGY OF PROTEROZOIC TO DEVONIAN METASOMATIC K-FELDSPAR IN BASEMENT ROCKS, SANGRE DE CRISTO RANGE, NEW MEXICO, USA","authors":"R. Sanders, M. Heizler","doi":"10.56577/sm-2004.724","DOIUrl":"https://doi.org/10.56577/sm-2004.724","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127603487","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}
New Mexico’s Early Permian vertebrate track record has received considerable attention over the last decade and is now recognized as a global standard. However, its Early Permian invertebrate ichnofaunas are less well known and have been relatively understudied. Here, we document an occurrence of Hamipes , an invertebrate ichnotaxon that has previously been unreported from New Mexico. The specimen (NMMNH P-32661) is from New Mexico Museum of Natural History locality 1339, which is in the upper part of the Sangre de Cristo Formation (Wolfcampian) of San Miguel County, New Mexico. A diverse vertebrate ichnofauna is present, dominated by typical Early Permian ichnogenera such as Dromopus and Batrachichnus . An invertebrate ichnofauna is also present, consisting of ichnogenera such as Paleohelcura and Dendroidichnites . The paleoenvironment is interpreted as a sheet-flood deposit on an extensive floodplain. transect of the state. The southernmost ichnoassemblage, centered near Las Cruces, is found in coastal tidal flat facies of the Robledo Mountains Formation that show periodic freshwater influence. This diverse ichnoassemblage is distinct in having four arthropod ichnotaxa, including Tonganoxichnus robledoensis , which are known only from their type localities within the Robledo Mountains Formation. Another ichnoassemblage, from the central part of the state around the Lucero uplift and Socorro, is low in ichnodiversity. It is found in transitional brackish waterinfluenced facies low in the Abo Formation. The characteristic ichnotaxon within this ichnoassemblage is Palaeophycus , an infaunal burrow attributed to polychaete makers. Another ichnoassemblage occurs in the northern part of the state, near Villanueva in San Miguel County. It is found within floodplain facies of the Sangre de Cristo Formation that were far inland during Wolfcampian time. The ichnodiversity of this arthropod-dominated ichnoassemblage is less than that of the southern ichnoassemblage. However, it may contain different ichnotaxa in addition to Hamipes . Continued investigation is needed to further determine the compositional similarities and differences between these ichnoassemblages.
新墨西哥州早二叠纪脊椎动物的记录在过去十年中受到了相当大的关注，现在被公认为全球标准。然而，它的早二叠纪无脊椎动物群不太为人所知，研究相对不足。在这里，我们记录了Hamipes的出现，这是一种以前未在新墨西哥州报道过的无脊椎鱼分类单元。该标本(NMMNH P-32661)来自新墨西哥自然历史博物馆1339地点，该地点位于新墨西哥州圣米格尔县Sangre de Cristo组(Wolfcampian)的上部。以典型的早二叠世石龙目和Batrachichnus等石龙属为主。一种无脊椎的鱼动物群也存在，由鱼属组成，如古helcura和树突石属。古环境被解释为在广阔的洪泛平原上形成的板状洪泛沉积。州的横断面。最南端的鱼群组合，以拉斯克鲁塞斯附近为中心，发现于Robledo山脉组的海岸潮滩相，显示出周期性的淡水影响。这种多样化的鱼类组合的独特之处在于有四种节肢动物，包括Tonganoxichnus robledoensis，它们仅在Robledo山脉组的类型位置中被发现。另一种来自该州中部卢塞罗隆起和索科罗周围的鱼类组合，其鱼类多样性较低。在Abo组下部过渡性微咸水影响相中发现。在这个鱼群中，最典型的鱼分类群是古藓类，这是一种多毛纲动物的洞穴。另一种鱼群聚集在该州北部，靠近圣米格尔县的维拉纽瓦。它被发现于狼行纪时期较内陆的桑格德克里斯托组洪泛平原相中。该节肢动物为主的鱼群多样性低于南方的鱼群。然而，它可能包含不同的鱼类群，除了Hamipes。需要进一步的研究来进一步确定这些组合在组成上的相似性和差异性。
{"title":"FIRST RECORD OF THE INVERTEBRATE ICHNOFOSSIL HAMIPES FROM THE LOWER PERMIAN OF NEW MEXICO","authors":"A. J. Lerner, S. Lucas, A. Hunt","doi":"10.56577/sm-2004.699","DOIUrl":"https://doi.org/10.56577/sm-2004.699","url":null,"abstract":"New Mexico’s Early Permian vertebrate track record has received considerable attention over the last decade and is now recognized as a global standard. However, its Early Permian invertebrate ichnofaunas are less well known and have been relatively understudied. Here, we document an occurrence of Hamipes , an invertebrate ichnotaxon that has previously been unreported from New Mexico. The specimen (NMMNH P-32661) is from New Mexico Museum of Natural History locality 1339, which is in the upper part of the Sangre de Cristo Formation (Wolfcampian) of San Miguel County, New Mexico. A diverse vertebrate ichnofauna is present, dominated by typical Early Permian ichnogenera such as Dromopus and Batrachichnus . An invertebrate ichnofauna is also present, consisting of ichnogenera such as Paleohelcura and Dendroidichnites . The paleoenvironment is interpreted as a sheet-flood deposit on an extensive floodplain. transect of the state. The southernmost ichnoassemblage, centered near Las Cruces, is found in coastal tidal flat facies of the Robledo Mountains Formation that show periodic freshwater influence. This diverse ichnoassemblage is distinct in having four arthropod ichnotaxa, including Tonganoxichnus robledoensis , which are known only from their type localities within the Robledo Mountains Formation. Another ichnoassemblage, from the central part of the state around the Lucero uplift and Socorro, is low in ichnodiversity. It is found in transitional brackish waterinfluenced facies low in the Abo Formation. The characteristic ichnotaxon within this ichnoassemblage is Palaeophycus , an infaunal burrow attributed to polychaete makers. Another ichnoassemblage occurs in the northern part of the state, near Villanueva in San Miguel County. It is found within floodplain facies of the Sangre de Cristo Formation that were far inland during Wolfcampian time. The ichnodiversity of this arthropod-dominated ichnoassemblage is less than that of the southern ichnoassemblage. However, it may contain different ichnotaxa in addition to Hamipes . Continued investigation is needed to further determine the compositional similarities and differences between these ichnoassemblages.","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126288039","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":"GEOARCHAEOLOGY AND PALEOENVIRONMENTS OF THE FIRST PEOPLING OF THE LLANO ESTACADO","authors":"V. Holliday","doi":"10.56577/sm-2004.687","DOIUrl":"https://doi.org/10.56577/sm-2004.687","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130012784","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":"AN ALTERNATIVE MODEL FOR LARAMIDE MAGMATISM IN THE SW US: IMPORTANCE OF LATE JURASSIC CONTINENTAL RIFTING","authors":"N. McMillan, T. Lawton, C. Cowee","doi":"10.56577/sm-2004.710","DOIUrl":"https://doi.org/10.56577/sm-2004.710","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133562427","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}
During the Jurassic through early Tertiary, the western margin of North America was a convergent plate boundary with the Farallon plate subducting below the North American Plate (Sevier-Laramide orogeny). Convergence is well evidenced in the western United States by arc volcanism, the fold and thrust belt, and foreland basin development (Western Interior Seaway). Infilling of the foreland from the fold and thrust belt to the west included numerous volcanic ash beds. In contrast to the western U.S. record, evidence for arc volcanism and the proximity of the arc to southern Mexico is not well understood due to limited stratigraphic, biostratigraphic, structural studies and due to overprinting by postLaramide deformation. One method used to address the proximity of arc volcanism to the Mexican craton is petrographic provenance studies of Cretaceous foreland basin sandstones. This study focuses on part of the Upper Cretaceous (Cenomanian-Campanian) turbiditic sandstones of the Mexcala Formation in southern Mexico (Guerrero state). Initial field observations from turbidite paleoflow indicators suggest northwest to westward transport directions. Preliminary petrographic results indicate abundant sandstone grains from plutonic and metamorphic sources (deformed quartz, white mica, biotite, epidote). However, little or no volcanically derived grains (pyroxenes, amphiboles, alkali plagioclase, volcanic lithics) have been observed. This apparent absence of volcanic input may be interpreted as the result of three possible scenarios: 1) the volcanic arc was too far removed from the foreland basin study area; 2) some physical barrier prevented detrital volcanic influx (i.e., fold and thrust belt or fault blocking); or 3) an absence of volcanic activity/erosion during the studied further petrographic m-thick Mexcala in coeval foreland the constrain tectonic models involving volcanic arc development adjacent to the
{"title":"MISSING ARC-VOLCANIC INPUT TO UPPER CRETACEOUS FORELAND BASIN DEPOSITS OF THE MEXCALA FORMATION, SOUTHERN MEXICO","authors":"Daniel F Dehn, M. Elrick, R. Molina-Garza","doi":"10.56577/sm-2004.673","DOIUrl":"https://doi.org/10.56577/sm-2004.673","url":null,"abstract":"During the Jurassic through early Tertiary, the western margin of North America was a convergent plate boundary with the Farallon plate subducting below the North American Plate (Sevier-Laramide orogeny). Convergence is well evidenced in the western United States by arc volcanism, the fold and thrust belt, and foreland basin development (Western Interior Seaway). Infilling of the foreland from the fold and thrust belt to the west included numerous volcanic ash beds. In contrast to the western U.S. record, evidence for arc volcanism and the proximity of the arc to southern Mexico is not well understood due to limited stratigraphic, biostratigraphic, structural studies and due to overprinting by postLaramide deformation. One method used to address the proximity of arc volcanism to the Mexican craton is petrographic provenance studies of Cretaceous foreland basin sandstones. This study focuses on part of the Upper Cretaceous (Cenomanian-Campanian) turbiditic sandstones of the Mexcala Formation in southern Mexico (Guerrero state). Initial field observations from turbidite paleoflow indicators suggest northwest to westward transport directions. Preliminary petrographic results indicate abundant sandstone grains from plutonic and metamorphic sources (deformed quartz, white mica, biotite, epidote). However, little or no volcanically derived grains (pyroxenes, amphiboles, alkali plagioclase, volcanic lithics) have been observed. This apparent absence of volcanic input may be interpreted as the result of three possible scenarios: 1) the volcanic arc was too far removed from the foreland basin study area; 2) some physical barrier prevented detrital volcanic influx (i.e., fold and thrust belt or fault blocking); or 3) an absence of volcanic activity/erosion during the studied further petrographic m-thick Mexcala in coeval foreland the constrain tectonic models involving volcanic arc development adjacent to the","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127383661","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}
A. Heckert, P. Hester, Rene C. Berkhoudt, W. S. Mathias
{"title":"40,000 FOSSILS ONLINE: THE NEW MEXICO MUSEUM OF NATURAL HISTORY AND SCIENCE’S DIGITAL DATABASE AS A TOOL FOR GEOSCIENTISTS AND EDUCATORS","authors":"A. Heckert, P. Hester, Rene C. Berkhoudt, W. S. Mathias","doi":"10.56577/sm-2004.685","DOIUrl":"https://doi.org/10.56577/sm-2004.685","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132160431","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}
D. W. Love, N. Dunbar, W. Mcintosh, S. Connell, J. Sorrell, D. Pierce
{"title":"PLIO-PLEISTOCENE FAULTS AND UNCONFORMITIES IN AND BETWEEN THE ARROYO OJITO AND SIERRA LADRONES FORMATIONS AND POSTSANTA FE GROUP PIEDMONT, MESA DEL SOL AND LLANO DE MANZANO, CENTRAL ALBUQUERQUE BASIN, NEW MEXICO","authors":"D. W. Love, N. Dunbar, W. Mcintosh, S. Connell, J. Sorrell, D. Pierce","doi":"10.56577/sm-2004.701","DOIUrl":"https://doi.org/10.56577/sm-2004.701","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130452628","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":"MAPPING FAULTS IN THE LIGHTNING DOCK KNOWN GEOTHERMAL AREA, ANIMAS VALLEY, NEW MEXICO USING SOIL CO2 FLUX MEASUREMENTS","authors":"K. Mclin, D. Norman, P. Kyle","doi":"10.56577/sm-2004.708","DOIUrl":"https://doi.org/10.56577/sm-2004.708","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"17 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120909392","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":"HYDROTHERMAL ALTERATION ASSOCIATED WITH A POSSIBLE COPPER-MOLYBDENUM PORPHYRY SYSTEM, WEBSTER PASS AREA, PARK AND SUMMIT COUNTIES, COLORADO.","authors":"Josh Crook","doi":"10.56577/sm-2004.672","DOIUrl":"https://doi.org/10.56577/sm-2004.672","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116272419","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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