{"title":"GEOMORPHIC S7ETTING OF ARCHAEOLOGICAL SITES AND TIMING OF RECENT EOLIAN EVENTS ON THE PAJARITO PLATEAU, NEW MEXICO","authors":"P. Drakos, S. Reneau","doi":"10.56577/sm-2004.674","DOIUrl":"https://doi.org/10.56577/sm-2004.674","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"2 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":"124327969","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, S. Krzyzanowski, S. Lucas, S. K. Harris
The Krzyzanowski bonebed (NMMNH locality 3764) is an extremely rich vertebrate locality in Upper Triassic Chinle Group strata in the Blue Hills near St. Johns in east-central Arizona. The fauna of the Blue Hills includes the aetosaur Stagonolepis and the phytosaur Rutiodon , both index fossils of the Adamanian (latest Carnian) land-vertebrate faunachron. The bonebearing horizon is low in the Blue Mesa Member of the Petrified Forest Formation and consists of an intraformational conglomerate that rapidly (<10 cm) fines upward into a bentonitic mudstone. The entire bonebed appears to be pedogenically modified, as the strata are color-mottled, and the bones are frequently encrusted with an iron-rich concretionary coating. Fossils from the Krzyzanowski bonebed consist of disarticulated, but associated (often jumbled) bones of small tetrapods and fish, and the largest elements recovered thus far are less than 20 cm maximum dimension. To date, the macrovertebrate fauna consists of actinopterygian and coelacanth fish, extremely fragmentary metoposaurid amphibians (confined to the base of the bonebed), phytosaurs, at least one sphenosuchian, several fish, probable theropods, and a possible ornithischian. Among the most important of these are a fish with an elongate, edentulous rostrum, and a tiny dentary bearing teeth that closely resemble those of Triassic ornithischians. Microvertebrates previously reported from the quarry include actinopterygian fish, at least two archosauriforms, probable theropods, an ornithischian dinosaur, and another probable herbivorous
{"title":"THE KRZYZANOWSKI BONEBED: AN UPPER TRIASSIC (ADAMANIAN: LATEST CARNIAN) VERTEBRATE FAUNA, AND ITS IMPLICATIONS FOR MICROVERTEBRATE STUDIES","authors":"A. Heckert, S. Krzyzanowski, S. Lucas, S. K. Harris","doi":"10.56577/sm-2004.681","DOIUrl":"https://doi.org/10.56577/sm-2004.681","url":null,"abstract":"The Krzyzanowski bonebed (NMMNH locality 3764) is an extremely rich vertebrate locality in Upper Triassic Chinle Group strata in the Blue Hills near St. Johns in east-central Arizona. The fauna of the Blue Hills includes the aetosaur Stagonolepis and the phytosaur Rutiodon , both index fossils of the Adamanian (latest Carnian) land-vertebrate faunachron. The bonebearing horizon is low in the Blue Mesa Member of the Petrified Forest Formation and consists of an intraformational conglomerate that rapidly (<10 cm) fines upward into a bentonitic mudstone. The entire bonebed appears to be pedogenically modified, as the strata are color-mottled, and the bones are frequently encrusted with an iron-rich concretionary coating. Fossils from the Krzyzanowski bonebed consist of disarticulated, but associated (often jumbled) bones of small tetrapods and fish, and the largest elements recovered thus far are less than 20 cm maximum dimension. To date, the macrovertebrate fauna consists of actinopterygian and coelacanth fish, extremely fragmentary metoposaurid amphibians (confined to the base of the bonebed), phytosaurs, at least one sphenosuchian, several fish, probable theropods, and a possible ornithischian. Among the most important of these are a fish with an elongate, edentulous rostrum, and a tiny dentary bearing teeth that closely resemble those of Triassic ornithischians. Microvertebrates previously reported from the quarry include actinopterygian fish, at least two archosauriforms, probable theropods, an ornithischian dinosaur, and another probable herbivorous","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"177 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":"123183366","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":"FISSURES ASSOCIATED WITH THE PAJARITO FAULT SYSTEM, RIO GRANDE RIFT, NEW MEXICO","authors":"A. Lavine, J. Gardner, C. Lewis","doi":"10.56577/sm-2004.698","DOIUrl":"https://doi.org/10.56577/sm-2004.698","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"36 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":"122281659","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":"STRATIGRAPHY AND TECTONIC IMPLICATIONS OF OLIGO-MIOCENE ROCKS IN THE SOUTHWESTERN JEMEZ MOUNTAINS, NEW MEXICO","authors":"S. Kelley, S. Connell","doi":"10.56577/sm-2004.693","DOIUrl":"https://doi.org/10.56577/sm-2004.693","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"65 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":"130621829","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}
The El Fresnal basin is one of four sub-basins constituting the formerly extensive Pluvial Lake Palomas system of northern Chihuahua and southern New Mexico. This basin is highly responsive to minor climate changes because of its large drainage area and high elevation headwaters. Castiglia (2002) documented constructional beach ridge complexes (BRCs) in the El Fresnal basin, that record millennially spaced highstands during the Holocene. This chronology shows early (8269±64, 8456±97 14 C yr B.P.), middle (6110±80 to 6721±68 14 C yr B.P.), and two late Holocene highstands (3815±52 to 4251±59 and 221±33 14 C yr B.P.). Using this framework, I describe the detailed stratigraphy and geomorphology of these BRC sediments to refine the BRC chronology. The BRC sediments comprise well-resolved lacustrine sediments that interfinger with distal alluvial fan sediments. The stratigraphic record of the early Holocene BRC shows two highstands punctuated by a soil-forming interval. A lacustrine silty clay unit coarsens to a lacustrine sandy loam unit, and is followed by a unit of small gravel filled channels and minor soil development. These units are indicative of a regressive sequence, and are overlain by a transgressive lacustrine unit and possible deltaic units. Then, as indicated by geomorphic evidence, a major period of erosion and shoreline incision is followed by a middle Holocene highstand. The middle Holocene highstand, during the supposed Altithermal, demonstrates the sensitivity of the basin to subtle climatic perturbations. These records have unique implications for the Chihuahuan Desert paleoclimate, especially when compared to regional lacustrine paleoclimate reconstructions.
El Fresnal盆地是构成奇瓦瓦州北部和新墨西哥州南部以前广泛的帕洛马斯雨积湖系统的四个子盆地之一。由于流域面积大，源头海拔高，该盆地对轻微的气候变化反应强烈。Castiglia(2002)记录了El Fresnal盆地的构造海滩脊复体(BRCs)，记录了全新世期间间隔千年的高地。该年代学显示早期(8269±64、8456±97 14 C yr B.P.)、中期(6110±80 ~ 6721±68 14 C yr B.P.)和两个晚全新世高峰(3815±52 ~ 4251±59和221±33 14 C yr B.P.)。利用这一框架，我详细描述了这些BRC沉积物的地层和地貌，以完善BRC年代学。BRC沉积物包括与远端冲积扇沉积物相交的良好溶解湖相沉积物。早全新世BRC的地层记录显示两个高地被一个成土间隔所打断。湖相粉质粘土单元粗化为湖相砂质壤土单元，然后是小砾石填充的渠道单元和少量土壤发育。这些单元是一个退退层序的标志，并被一个海侵湖相单元和可能的三角洲单元覆盖。然后，地貌证据表明，一个主要的侵蚀和海岸线切割时期之后是全新世中期的高地。全新世中期的高地，在假定的高热期，显示了盆地对细微气候扰动的敏感性。这些记录对奇瓦瓦沙漠古气候具有独特的意义，特别是与区域湖泊古气候重建相比。
{"title":"THE PALEOCLIMATIC IMPLICATIONS OF HOLOCENE SHORELINE STRATIGRAPHY OF THE EL FRESNAL BASIN, NORTHERN CHIHUAHUA, MEXICO","authors":"J. Parker, P. Fawcett","doi":"10.56577/sm-2004.717","DOIUrl":"https://doi.org/10.56577/sm-2004.717","url":null,"abstract":"The El Fresnal basin is one of four sub-basins constituting the formerly extensive Pluvial Lake Palomas system of northern Chihuahua and southern New Mexico. This basin is highly responsive to minor climate changes because of its large drainage area and high elevation headwaters. Castiglia (2002) documented constructional beach ridge complexes (BRCs) in the El Fresnal basin, that record millennially spaced highstands during the Holocene. This chronology shows early (8269±64, 8456±97 14 C yr B.P.), middle (6110±80 to 6721±68 14 C yr B.P.), and two late Holocene highstands (3815±52 to 4251±59 and 221±33 14 C yr B.P.). Using this framework, I describe the detailed stratigraphy and geomorphology of these BRC sediments to refine the BRC chronology. The BRC sediments comprise well-resolved lacustrine sediments that interfinger with distal alluvial fan sediments. The stratigraphic record of the early Holocene BRC shows two highstands punctuated by a soil-forming interval. A lacustrine silty clay unit coarsens to a lacustrine sandy loam unit, and is followed by a unit of small gravel filled channels and minor soil development. These units are indicative of a regressive sequence, and are overlain by a transgressive lacustrine unit and possible deltaic units. Then, as indicated by geomorphic evidence, a major period of erosion and shoreline incision is followed by a middle Holocene highstand. The middle Holocene highstand, during the supposed Altithermal, demonstrates the sensitivity of the basin to subtle climatic perturbations. These records have unique implications for the Chihuahuan Desert paleoclimate, especially when compared to regional lacustrine paleoclimate reconstructions.","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"1 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":"134249872","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":"OVERVIEW OF GEOLOGY OF WINE-PRODUCING AREAS IN NEW MEXICO","authors":"A. Hunt, S. Lucas","doi":"10.56577/sm-2004.690","DOIUrl":"https://doi.org/10.56577/sm-2004.690","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"919 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":"131857541","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}
The 2350 m (7710’) Yates #2 La Mesa well, west of Santa Fe, is surrounded by a considerable amount of controversy because of different interpretations of formations present in the well. Petrographic analysis of 46 thin sections of cuttings is underway to resolve these controversies, and their implications for the tectonic history of the southern Española basin. The are rocks rich in and clinopyroxene. These rocks lithologically correlate to basanite and basalt lava flows of the Cieneguilla "limburgite" that crop out near La Cienega. The great quantity of vesicular tachylite and sideromelane glass (some replaced by zeolite) implies proximity to a vent. The lower 307 m (5012'-6018') of volcanic material resembles the latitic lava flows and sedimentary deposits of the Espinaso Formation.
Santa Fe以西2350米(7710英尺)长的Yates #2 La Mesa井，由于对井中存在的地层有不同的解释，被相当多的争议所包围。目前正在对46个薄片岩屑进行岩石学分析，以解决这些争议，以及它们对Española南部盆地构造史的影响。这些岩石富含斜辉石。从岩性上看，这些岩石与拉希内加附近的林堡岩的玄武岩和玄武岩熔岩流有关。大量的泡状速石和铁粒玻璃(有些被沸石取代)表明靠近一个通风口。下部307米(5012′-6018′)的火山物质类似于埃斯皮纳索组的熔岩流和沉积沉积物。
{"title":"PETROGRAPHIC ANALYSIS OF CUTTINGS FROM THE YATES #2 LA MESA WELL AND IMPLICATIONS FOR THE TECTONIC HISTORY OF THE SOUTHERN ESPANOLA BASIN","authors":"Caroline Myer, Gary A. Smith","doi":"10.56577/sm-2004.713","DOIUrl":"https://doi.org/10.56577/sm-2004.713","url":null,"abstract":"The 2350 m (7710’) Yates #2 La Mesa well, west of Santa Fe, is surrounded by a considerable amount of controversy because of different interpretations of formations present in the well. Petrographic analysis of 46 thin sections of cuttings is underway to resolve these controversies, and their implications for the tectonic history of the southern Española basin. The are rocks rich in and clinopyroxene. These rocks lithologically correlate to basanite and basalt lava flows of the Cieneguilla \"limburgite\" that crop out near La Cienega. The great quantity of vesicular tachylite and sideromelane glass (some replaced by zeolite) implies proximity to a vent. The lower 307 m (5012'-6018') of volcanic material resembles the latitic lava flows and sedimentary deposits of the Espinaso Formation.","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"68 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":"127345406","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 new fossil specimen from New Mexico Museum of Natural History locality 5585 in the southwestern Jemez Mountains represents the second record of fossil bird tracks from New Mexico. The strata that yielded the specimen were previously mapped as Zia Formation, but recent work by Shari Kelley indicates that the strata are more likely equivalent to the Abiquiu Formation. The Oligocene to Miocene sedimentary rocks in this area can be divided into lower volcaniclastic member and an upper fluvial sandstone member. The tracks are from low in the fluvial unit. The tracks are from low in the fluvial unit. The fluvial unit has an 40 Ar/ 39 Ar age of 20.61±0.07 Ma on an ash bed about 6.5 km NE of NMMNH locality 5585. This is a lower Miocene (close to the boundary of the Arikareean and Hemingfordian landmammal “ages”) age. The new specimen consists of a nearly rectangular slab with dimensions of approximately 26 x 12 x 2.5 cm. There at least 16 bird tracks on one surface which all appear to represent one ichnotaxon. The impression of digit II is 2.25-2.5 cm long and is straight or incurved. The digit impressions of II and IV are straight and about 1.5 and 2 cm in length respectively. A distinct hallux impression is located immediately posterior to digit impression II and is 04- 0.6 cm long. There is no preservation of webbing. In at least two instances there are double imprints of digit impressions suggesting that the bird stayed in one location for a period and shifted its position. There are no clear trackways or indication of a preferred orientation to the tracks. These factors suggest terrestrial feeding activity. The
新墨西哥自然历史博物馆位于杰梅兹山脉西南部5585地区的一个新的化石标本代表了新墨西哥鸟类化石足迹的第二个记录。产生标本的地层以前被定位为齐亚地层，但Shari Kelley最近的工作表明，该地层更可能相当于阿比奎地层。本区渐新统至中新统沉积岩可分为下火山碎屑岩段和上河流砂岩段。这些痕迹来自河流单元的下部。这些痕迹来自河流单元的下部。该河流单元位于NMMNH地区5585东北约6.5 km的灰层上，40 Ar/ 39 Ar年龄为20.61±0.07 Ma。这是中新世晚期(接近Arikareean和mingfordian陆生哺乳动物“时代”的边界)。新样品由一个近矩形板组成，尺寸约为26 x 12 x 2.5 cm。在一个表面上至少有16只鸟的足迹，它们似乎都代表着一个鱼分类单元。II指印长2.25-2.5 cm，呈直纹或弯曲纹。II和IV的指印是直的，长度分别约为1.5和2cm。一个明显的拇印位于指印II的后面，长度为04- 0.6 cm。织带没有保存。在至少两个例子中，有双趾印表明这只鸟在一个地方停留了一段时间，然后改变了位置。没有明确的轨道，也没有指示轨道的首选方向。这些因素表明陆生捕食活动。的
{"title":"BIRD FOOTRPINTS FROM THE MIOCENE “ABIQUIU” FORMATION OF NORTH-CENTRAL NEW MEXICO WITH A REVIEW OF CENOZOIC TETRAPOD TRACKS OF NEW MEXICO","authors":"A. Hunt, S. Kelley, S. Lucas","doi":"10.56577/sm-2004.689","DOIUrl":"https://doi.org/10.56577/sm-2004.689","url":null,"abstract":"A new fossil specimen from New Mexico Museum of Natural History locality 5585 in the southwestern Jemez Mountains represents the second record of fossil bird tracks from New Mexico. The strata that yielded the specimen were previously mapped as Zia Formation, but recent work by Shari Kelley indicates that the strata are more likely equivalent to the Abiquiu Formation. The Oligocene to Miocene sedimentary rocks in this area can be divided into lower volcaniclastic member and an upper fluvial sandstone member. The tracks are from low in the fluvial unit. The tracks are from low in the fluvial unit. The fluvial unit has an 40 Ar/ 39 Ar age of 20.61±0.07 Ma on an ash bed about 6.5 km NE of NMMNH locality 5585. This is a lower Miocene (close to the boundary of the Arikareean and Hemingfordian landmammal “ages”) age. The new specimen consists of a nearly rectangular slab with dimensions of approximately 26 x 12 x 2.5 cm. There at least 16 bird tracks on one surface which all appear to represent one ichnotaxon. The impression of digit II is 2.25-2.5 cm long and is straight or incurved. The digit impressions of II and IV are straight and about 1.5 and 2 cm in length respectively. A distinct hallux impression is located immediately posterior to digit impression II and is 04- 0.6 cm long. There is no preservation of webbing. In at least two instances there are double imprints of digit impressions suggesting that the bird stayed in one location for a period and shifted its position. There are no clear trackways or indication of a preferred orientation to the tracks. These factors suggest terrestrial feeding activity. The","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"1 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":"129022274","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}
The Socorro magma body is located in central New Mexico along the intersection of the Socorro fracture zone and the Rio Grande rift. The inflation rate of the magma body has been approximated at 2 to 4 mm/yr, based on leveling data by Larsen and others (1986) and InSAR data by Fialko and others (2001). This is a rapid rate that will impact the landscape evolution of the nearby Rio Salado drainage. The focus of this study is to evaluate the rate and amount of stream terrace deflection due to uplift of the magma body. Perturbations of the fluvial system act to offset stream terrace surfaces. The area of maximum uplift is localized. Both the Rio Grande and Rio Salado traverse this zone. Comparison of the modern stream profile with the paleostream profiles (indicated by the fluvial terraces) will show increasing deflection across the zone of maximum uplift. Preliminary examination of the Rio Salado drainage indicates that there are four terraces. Soils will be used to correlate and to estimate the ages of the terraces, based on the degree of CaCO 3 accumulation. This study will constrain the relative ages of the surfaces, determine the degree of uplift and form the basis for numeric age dating of the terrace surfaces.
{"title":"DEFLECTION OF RIO SALADO TERRACE SURFACES DUE TO UPLIFT OF THE SOCORRO MAGMA BODY, SOCORRO, NEW MEXICO","authors":"L. Majkowski, J. Harrison, D. Love","doi":"10.56577/sm-2004.706","DOIUrl":"https://doi.org/10.56577/sm-2004.706","url":null,"abstract":"The Socorro magma body is located in central New Mexico along the intersection of the Socorro fracture zone and the Rio Grande rift. The inflation rate of the magma body has been approximated at 2 to 4 mm/yr, based on leveling data by Larsen and others (1986) and InSAR data by Fialko and others (2001). This is a rapid rate that will impact the landscape evolution of the nearby Rio Salado drainage. The focus of this study is to evaluate the rate and amount of stream terrace deflection due to uplift of the magma body. Perturbations of the fluvial system act to offset stream terrace surfaces. The area of maximum uplift is localized. Both the Rio Grande and Rio Salado traverse this zone. Comparison of the modern stream profile with the paleostream profiles (indicated by the fluvial terraces) will show increasing deflection across the zone of maximum uplift. Preliminary examination of the Rio Salado drainage indicates that there are four terraces. Soils will be used to correlate and to estimate the ages of the terraces, based on the degree of CaCO 3 accumulation. This study will constrain the relative ages of the surfaces, determine the degree of uplift and form the basis for numeric age dating of the terrace surfaces.","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"27 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":"129026509","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":"TURONIAN AMMONITES FROM THE UPPER CRETACEOUS D-CROSS MEMBER OF THE MANCOS SHALE, PUERTECITO, SOCORRO COUNTY, NEW MEXICO","authors":"P. Sealey, S. Lucas","doi":"10.56577/sm-2004.726","DOIUrl":"https://doi.org/10.56577/sm-2004.726","url":null,"abstract":"","PeriodicalId":142738,"journal":{"name":"New Mexico Geological Society, 2004 Annual Spring Meeting, Proceedings Volume","volume":"2 1 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":"132006150","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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