Concord Mcnair Scholars Research Journal
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Bailey Mark Hopkins 1980
AN ABSTRACT OF THE THESIS OF MARK H. BAILEY for the degree of Master of Science in Geology presented on June 7, 1979 Title: BEDROCK GEOLOGY OF WESTERN TAYLOR PARK, GUNNISON COUNTY, COLORADO Signature redacted for privacy. Abstract approved: I ._&V_j - Dr. Robert D. Lawrence The western Taylor Park area covers about 65 square miles on the western flank of the Sawatch Range. It is underlain chiefly by Precambrian rocks, partiallycovered on the east by glacial debris andoverlapped on the west and south by Paleozoic sedimentary rocks. The Precambrian rocks include a group ofmetasedimen- tary rocks of an undetermined age greaterthan 1700 m.y. The metasedimentary rocks include five mineralogicallydis- tinct units, quartzite, quartz-muscovite schist, quartz- epidote schist, quartz-plagioclase-biotite schist,and quartz-biotite-microcline-sillimaflite schist. The higher grade sillimanite-bearing biotite schists arerestricted to the western half of the map area and closelyassociated with the Forest Hill granitic rocks. The metasedimentary rocks were intruded twiceduring Precambrian time. The oldest intrusive event resulted in syntectonic emplacement of granodiorite and biotite tona- lite rocks. These rocks correlate with the 1700 m.y.old Denny Creek granodiorite gneiss and Kroenkegranodiorite which are mapped and informally named in the adjoining Mount Harvard quadrangle. The second, post-tectonic, igneous eventproduced granitic rocks that are dated at 1030 m.y. byRb-Sr meth- ods. These rocks include two comagmatic graniticphases, the Forest Hill porphyritic granite and the ForestHill cataclastic granite. A third phase, the Forest Hill horn- blende granodiorite, intrudes the porphyritic graniteand, therefore, is younger than the granitic phases. The 1030 m.y. -
UNDER the ROCK SUNY Geneseo’S GSCI Annual Newsletter SUMMER 2018
UNDER THE ROCK SUNY Geneseo’s GSCI Annual Newsletter SUMMER 2018 Greetings from the chair: Happy end of summer to all of our Geneseo GSCI friends and family. My first year as chair Fall Brook waterfall, Geneseo has been a good one. I find I am very privileged to lead such a strong department On a department level, we have started to dedicate some that continues to inspire and nurture young intentional focus to making sure we are safe when we take geologists as well as make an impact on our students on field trips. To help us learn more about best understanding of the Earth and all its facets. practices regarding safety, we invited Kurt Burmeister (University of the Pacific) to come and present a “field Mineralogy and Petrology continued to serve large numbers safety course” to our department. It was co-sponsored by over the ’17-18 academic year. Mineralogy had a whopping 48 the Provost’s office and our department (thanks to all for students! They brought a zeal and curiosity that made for some your support). This training was attended by a student, all great term paper reading. It looks like this upcoming year will of the GSCI faculty and staff, and faculty from the Bio and be slightly smaller, but that will allow students to have easier Geography departments. It was a transformational event access to instruments such as the X-ray diffractometer. made us think more proactively about field safety, and we have already started to implement changes to our field In the fall, I was delighted to attend the national GSA meeting trips. -
Garden of the Gods at Colorado Springs: Paleozoic and Mesozoic Sedimentation and Tectonics Marcus R
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Liberty University Digital Commons Liberty University DigitalCommons@Liberty University Faculty Publications and Presentations Department of Biology and Chemistry 2010 Garden of the Gods at Colorado Springs: Paleozoic and Mesozoic Sedimentation and Tectonics Marcus R. Ross Liberty University, [email protected] William A. Hoesch Steven A. Austin John H. Whitmore Timothy L. Clarey Follow this and additional works at: http://digitalcommons.liberty.edu/bio_chem_fac_pubs Part of the Biology Commons, and the Chemistry Commons Recommended Citation Ross, Marcus R.; Hoesch, William A.; Austin, Steven A.; Whitmore, John H.; and Clarey, Timothy L., "Garden of the Gods at Colorado Springs: Paleozoic and Mesozoic Sedimentation and Tectonics" (2010). Faculty Publications and Presentations. Paper 114. http://digitalcommons.liberty.edu/bio_chem_fac_pubs/114 This Article is brought to you for free and open access by the Department of Biology and Chemistry at DigitalCommons@Liberty University. It has been accepted for inclusion in Faculty Publications and Presentations by an authorized administrator of DigitalCommons@Liberty University. For more information, please contact [email protected]. The Geological Society of America Field Guide 18 2010 Garden of the Gods at Colorado Springs: Paleozoic and Mesozoic sedimentation and tectonics Marcus R. Ross Department of Biology and Chemistry, Liberty University, Lynchburg, Virginia 24502, USA William A. Hoesch Consultant, 9310 Fanita Parkway, Santee, California 92071, USA Steven A. Austin Austin Research Consulting Inc., 23619 Calle Ovieda, Ramona, California 92065, USA John H. Whitmore Science and Mathematics Department, Cedarville University, Cedarville, Ohio 45314, USA Timothy L. Clarey Geosciences Department, Delta College, University Center, Michigan 48710, USA ABSTRACT Exposed along the southeast fl ank of the Colorado Front Range are rocks that beautifully illustrate the interplay of sedimentation and tectonics. -
Pennsylvanian Stratigraphy of the Colorado Springs Quadrangle, Colorado
Louisiana State University LSU Digital Commons LSU Historical Dissertations and Theses Graduate School 1947 Pennsylvanian Stratigraphy of the Colorado Springs Quadrangle, Colorado. Kenneth Phelps Mclaughlin Louisiana State University and Agricultural & Mechanical College Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_disstheses Part of the Earth Sciences Commons Recommended Citation Mclaughlin, Kenneth Phelps, "Pennsylvanian Stratigraphy of the Colorado Springs Quadrangle, Colorado." (1947). LSU Historical Dissertations and Theses. 7899. https://digitalcommons.lsu.edu/gradschool_disstheses/7899 This Dissertation is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Historical Dissertations and Theses by an authorized administrator of LSU Digital Commons. For more information, please contact [email protected]. MANUSCRIPT THESES Unpublished theses submitted for the master's and doctor's degrees and deposited in the Louisiana State University Library are available for inspection. Use of any thesis is limited by the rights of the author. Bibliographical references may be noted3 but passages may not be copied unless the author has given permission# Credit must be given in subsequent written or published work# A library which borrows this thesis for use by its clientele is expected to make sure that the borrower is aware of the above restrictions, LOUISIANA STATE UNIVERSITY LIBRARY 119-a PENN3YLVAHIAN STRATIGRAPHY OF THE COLORADO SFRIN3S Q U A D R A T E , COLORADO A Dissertation Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanicg ! College in partial fulfillment of the requirements for the degree of Doctor of Philosophy in The School of Geology by Kenneth Phelps McLaughlin B«A«, University of Missouri, 1939 M.A., University of Missouri, 1941 May, 1947 UMI Number: DP69277 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. -
Diachronous Development of Great Unconformities Before Neoproterozoic Snowball Earth
Diachronous development of Great Unconformities before Neoproterozoic Snowball Earth Rebecca M. Flowersa,1, Francis A. Macdonaldb, Christine S. Siddowayc, and Rachel Havraneka aDepartment of Geological Sciences, University of Colorado, Boulder, CO 80309; bEarth Science Department, University of California, Santa Barbara, CA 93106; and cDepartment of Geology, The Colorado College, Colorado Springs, CO 80903 Edited by Paul F. Hoffman, University of Victoria, Victoria, Canada, and approved March 6, 2020 (received for review July 30, 2019) The Great Unconformity marks a major gap in the continental precisely because the Great Unconformities mark a large gap in geological record, separating Precambrian basement from Phan- the rock record, the erosion history leading to their formation erozoic sedimentary rocks. However, the timing, magnitude, cannot be investigated directly by study of preserved units. spatial heterogeneity, and causes of the erosional event(s) and/ Past work leads to at least four general models for the timing or depositional hiatus that lead to its development are unknown. and magnitude of pre-Great Unconformity continental erosion, We present field relationships from the 1.07-Ga Pikes Peak batho- which are depicted in Fig. 1. Some have proposed major erosion lith in Colorado that constrain the position of Cryogenian and of the continents associated with assembly of the supercontinent Cambrian paleosurfaces below the Great Unconformity. Tavakaiv Rodinia and mantle upwelling below it prior to 850 Ma (Hy- sandstone injectites with an age of ≥676 ± 26 Ma cut Pikes Peak pothesis 1) or with the early diachronous breakup of Rodinia granite. Injection of quartzose sediment in bulbous bodies indi- between 850 and 717 Ma (Hypothesis 2) (10–17). -
Italic Page Numbers Indicate Major References]
Index [Italic page numbers indicate major references] Abbott Formation, 411 379 Bear River Formation, 163 Abo Formation, 281, 282, 286, 302 seismicity, 22 Bear Springs Formation, 315 Absaroka Mountains, 111 Appalachian Orogen, 5, 9, 13, 28 Bearpaw cyclothem, 80 Absaroka sequence, 37, 44, 50, 186, Appalachian Plateau, 9, 427 Bearpaw Mountains, 111 191,233,251, 275, 377, 378, Appalachian Province, 28 Beartooth Mountains, 201, 203 383, 409 Appalachian Ridge, 427 Beartooth shelf, 92, 94 Absaroka thrust fault, 158, 159 Appalachian Shelf, 32 Beartooth uplift, 92, 110, 114 Acadian orogen, 403, 452 Appalachian Trough, 460 Beaver Creek thrust fault, 157 Adaville Formation, 164 Appalachian Valley, 427 Beaver Island, 366 Adirondack Mountains, 6, 433 Araby Formation, 435 Beaverhead Group, 101, 104 Admire Group, 325 Arapahoe Formation, 189 Bedford Shale, 376 Agate Creek fault, 123, 182 Arapien Shale, 71, 73, 74 Beekmantown Group, 440, 445 Alabama, 36, 427,471 Arbuckle anticline, 327, 329, 331 Belden Shale, 57, 123, 127 Alacran Mountain Formation, 283 Arbuckle Group, 186, 269 Bell Canyon Formation, 287 Alamosa Formation, 169, 170 Arbuckle Mountains, 309, 310, 312, Bell Creek oil field, Montana, 81 Alaska Bench Limestone, 93 328 Bell Ranch Formation, 72, 73 Alberta shelf, 92, 94 Arbuckle Uplift, 11, 37, 318, 324 Bell Shale, 375 Albion-Scioio oil field, Michigan, Archean rocks, 5, 49, 225 Belle Fourche River, 207 373 Archeolithoporella, 283 Belt Island complex, 97, 98 Albuquerque Basin, 111, 165, 167, Ardmore Basin, 11, 37, 307, 308, Belt Supergroup, 28, 53 168, 169 309, 317, 318, 326, 347 Bend Arch, 262, 275, 277, 290, 346, Algonquin Arch, 361 Arikaree Formation, 165, 190 347 Alibates Bed, 326 Arizona, 19, 43, 44, S3, 67. -
Precambrian to Earliest Mississippian Stratigraphy, Geologic History, and Paleogeography of Northwestern Colorado and West-Central Colorado
Precambrian to Earliest Mississippian Stratigraphy, Geologic History, and Paleogeography of Northwestern Colorado and West-Central Colorado Prepared in cooperation with the Colorado Geological Survey U.S. GEOLOGICAL SURVEY BULLETIN 1 787-U AVAILABILITY OF BOOKS AND MAPS OF THE U.S. GEOLOGICAL SURVEY Instructions on ordering publications of the U.S. Geological Survey, along with the last offerings, are given in the current-year issues of the monthly catalog "New Publications of the U.S. Geological Survey." Prices of available U.S. Geological Survey publications released prior to the current year are listed in the most recent annual "Price and Availability List." Publications that are listed in various U.S. Geological Survey catalogs (see back inside cover) but not listed in the most recent annual "Price and Availability List" are no longer available. Prices of reports released to the open files are given in the listing "U.S. Geological Survey Open-File Reports," updated monthly, which is for sale in microfiche from the U.S. Geological Survey Books and Open-File Reports Sales, Box 25286, Denver, CO 80225. Order U.S. Geological Survey publications by mail or over the counter from the offices given below. BY MAIL OVER THE COUNTER Books Books Professional Papers, Bulletins, Water-Supply Papers, Tech Books of the U.S. Geological Survey are available over the niques of Water-Resources Investigations, Circulars, publications counter at the following U.S. Geological Survey offices, all of of general interest (such as leaflets, pamphlets, booklets), single which are authorized agents of the Superintendent of Documents. copies of periodicals (Earthquakes & Volcanoes, Preliminary De termination of Epicenters), and some miscellaneous reports, includ ANCHORAGE, Alaska-4230 University Dr., Rm. -
Foote, M. 2001. Inferring Temporal Patterns of Preservation, Origination
Paleobiology, 27(4), 2001, pp. 602±630 Inferring temporal patterns of preservation, origination, and extinction from taxonomic survivorship analysis Michael Foote Abstract.ÐApparent variation in rates of origination and extinction re¯ects the true temporal pat- tern of taxonomic rates as well as the distorting effects of incomplete and variable preservation, effects that are themselves exacerbated by true variation in taxonomic rates. Here I present an ap- proach that can undo these distortions and thus permit estimates of true taxonomic rates, while providing estimates of preservation in the process. Standard survivorship probabilities are mod- i®ed to incorporate variable taxonomic rates and rates of fossil recovery. Time series of these rates are explored by numerical optimization until the set of rates that best explains the observed data is found. If internal occurrences within stratigraphic ranges are available, or if temporal patterns of fossil recovery can otherwise be assumed, these constraints can be exploited, but they are by no means necessary. In its most general form, the approach requires no data other than ®rst and last appearances. When tested against simulated data, the method is able to recover temporal patterns in rates of origination, extinction, and preservation. With empirical data, it yields estimates of pres- ervation rate that agree with those obtained independently by tabulating internal occurrences with- in stratigraphic ranges. Moreover, when empirical occurrence data are arti®cially degraded, the method detects the resulting gaps in sampling and corrects taxonomic rates. Preliminary appli- cation to data on Paleozoic marine animals suggests that some features of the apparent record, such as the forward smearing of true origination events and the backward smearing of true extinction events, can be detected and corrected. -
RESEARCH Provenance of Pennsylvanian–Permian
RESEARCH Provenance of Pennsylvanian–Permian sedimentary rocks associated with the Ancestral Rocky Mountains orogeny in southwestern Laurentia: Implications for continental-scale Laurentian sediment transport systems Ryan J. Leary1, Paul Umhoefer2, M. Elliot Smith2, Tyson M. Smith3, Joel E. Saylor4, Nancy Riggs2, Greg Burr2, Emma Lodes2, Daniel Foley2, Alexis Licht5, Megan A. Mueller5, and Chris Baird5 1DEPARTMENT OF EARTH AND ENVIRONMENTAL SCIENCE, NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY, SOCORRO, NEW MEXICO 87801, USA 2SCHOOL OF EARTH AND SUSTAINABILITY, NORTHERN ARIZONA UNIVERSITY, FLAGSTAFF, ARIZONA 86011, USA 3DEPARTMENT OF EARTH AND ATMOSPHERIC SCIENCES, UNIVERSITY OF HOUSTON, HOUSTON, TEXAS 77204, USA 4DEPARTMENT OF EARTH, OCEAN AND ATMOSPHERIC SCIENCES, UNIVERSITY OF BRITISH COLUMBIA, VANCOUVER, BRITISH COLUMBIA V6T1Z4, CANADA 5DEPARTMENT OF EARTH AND SPACE SCIENCES, UNIVERSITY OF WASHINGTON, SEATTLE, WASHINGTON 98195, USA ABSTRACT The Ancestral Rocky Mountains system consists of a series of basement-cored uplifts and associated sedimentary basins that formed in southwestern Laurentia during Early Pennsylvanian–middle Permian time. This system was originally recognized by aprons of coarse, arkosic sandstone and conglomerate within the Paradox, Eagle, and Denver Basins, which surround the Front Range and Uncompahgre basement uplifts. However, substantial portions of Ancestral Rocky Mountain–adjacent basins are filled with carbonate or fine-grained quartzose material that is distinct from proximal arkosic rocks, and detrital zircon data from basins adjacent to the Ancestral Rocky Moun- tains have been interpreted to indicate that a substantial proportion of their clastic sediment was sourced from the Appalachian and/or Arctic orogenic belts and transported over long distances across Laurentia into Ancestral Rocky Mountain basins. In this study, we pres- ent new U-Pb detrital zircon data from 72 samples from strata within the Denver Basin, Eagle Basin, Paradox Basin, northern Arizona shelf, Pedregosa Basin, and Keeler–Lone Pine Basin spanning ~50 m.y. -
Quantifying Early Marine Diagenesis in Shallow-Water Carbonate Sediments
Available online at www.sciencedirect.com ScienceDirect Geochimica et Cosmochimica Acta xxx (2018) xxx–xxx www.elsevier.com/locate/gca Quantifying early marine diagenesis in shallow-water carbonate sediments Anne-Sofie C. Ahm a,⇑, Christian J. Bjerrum b, Clara L. Bla¨ttler a, Peter K. Swart c, John A. Higgins a a Princeton University, Department of Geosciences, Guyot Hall, Princeton, NJ 08544, United States b University of Copenhagen, Nordic Center for Earth Evolution, Department of Geoscience and Natural Resource Management, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark c Department of Marine Geosciences, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, United States Received 4 August 2017; accepted in revised form 23 February 2018; available online xxxx Abstract Shallow-water carbonate sediments constitute one of the most abundant and widely used archives of Earth’s surface evo- lution. One of the main limitations of this archive is the susceptibility of the chemistry of carbonate sediments to post- depositional diagenesis. Here, we develop a numerical model of marine carbonate diagenesis that tracks the elemental and isotopic composition of calcium, magnesium, carbon, oxygen, and strontium, during dissolution of primary carbonates and re-precipitation of secondary carbonate minerals. The model is ground-truthed using measurements of geochemical prox- ies from sites on and adjacent to the Bahamas platform (Higgins et al., 2018) and authigenic carbonates in the organic-rich deep marine Monterey Formation (Bla¨ttler et al., 2015). Observations from these disparate sedimentological and diagenetic settings show broad covariation between bulk sediment calcium and magnesium isotopes that can be explained by varying the extent to which sediments undergo diagenesis in seawater-buffered or sediment-buffered conditions. -
Water Section (Govone, NW Italy)
Geological Magazine The response of water column and sedimentary www.cambridge.org/geo environments to the advent of the Messinian salinity crisis: insights from an onshore deep- water section (Govone, NW Italy) Original Article 1 2 2 1 Cite this article: Sabino M, Dela Pierre F, Mathia Sabino , Francesco Dela Pierre , Marcello Natalicchio , Daniel Birgel , Natalicchio M, Birgel D, Gier S, and Peckmann J Susanne Gier3 and Jörn Peckmann1 (2021) The response of water column and sedimentary environments to the advent of the 1 Messinian salinity crisis: insights from an Institut für Geologie, Centrum für Erdsystemforschung und Nachhaltigkeit, Universität Hamburg, D-20146 2 onshore deep-water section (Govone, NW Italy). Hamburg, Germany; Dipartimento di Scienze della Terra, Università degli Studi di Torino, I-10125 Torino, Italy Geological Magazine 158:825–841. https:// and 3Department für Geodynamik und Sedimentologie, Universität Wien, A-1090 Wien, Austria doi.org/10.1017/S0016756820000874 Abstract Received: 17 February 2020 Revised: 5 June 2020 During Messinian time, the Mediterranean underwent hydrological modifications culminating Accepted: 13 July 2020 5.97 Ma ago with the Messinian salinity crisis (MSC). Evaporite deposition and alleged anni- First published online: 7 September 2020 hilation of most marine eukaryotes were taken as evidence of the establishment of basin-wide Keywords: hypersalinity followed by desiccation. However, the palaeoenvironmental conditions during the water-column stratification; marine conditions; MSC are still -
Recognition and Significance of Upper Devonian Fluvial, Estuarine, and Mixed Siliciclastic-Carbonate Nearshore Marine Facies in the GEOSPHERE, V
Research Paper THEMED ISSUE: The Growth and Evolution of North America: Insights from the EarthScope Project GEOSPHERE Recognition and significance of Upper Devonian fluvial, estuarine, and mixed siliciclastic-carbonate nearshore marine facies in the GEOSPHERE, v. 15, no. 5 San Juan Mountains (southwestern Colorado, USA): Multiple incised https://doi.org/10.1130/GES02085.1 16 figures; 3 tables; 1 set of supplemental files valleys backfilled by lowstand and transgressive systems tracts James E. Evans1, Joshua T. Maurer1,2, and Christopher S. Holm-Denoma3 CORRESPONDENCE: [email protected] 1Department of Geology, Bowling Green State University, Bowling Green, Ohio 43403, USA 2Carmeuse Lime and Stone Company, 6104 Grand Avenue, Suite B, Pittsburgh, Pennsylvania 15225, USA CITATION: Evans, J.E., Maurer, J.T., and Holm- 3Geology, Geophysics, and Geochemistry Science Center, U.S. Geological Survey, Denver Federal Center, Denver, Colorado 80225, USA Denoma, C.S., 2019, Recognition and significance of Upper Devonian fluvial, estuarine, and mixed siliciclastic- carbonate nearshore marine facies in the ■ ABSTRACT Allen and Posamentier, 1993; Catuneanu, 2006) and transgressive estuarine San Juan Mountains (southwestern Colorado, USA): Multiple incised valleys backfilled by lowstand and depositional systems (Cotter and Driese, 1998; Fischbein et al., 2009; Ainsworth transgressive systems tracts: Geosphere, v. 15, no. 5, The Upper Devonian Ignacio Formation (as stratigraphically revised) com- et al., 2011) in evaluating relative sea-level changes and the influence of allo- p. 1479–1507, https://doi.org/10.1130/GES02085.1. prises a transgressive, tide-dominated estuarine depositional system in the genic controlling variables (eustasy, tectonics, and sediment supply). In outcrop San Juan Mountains (Colorado, USA).