DOCSLIB.ORG

The Dakota Formation in Central South Dakota

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The Dakota Formation in Central South Dakota PROC. S. D. ACAD. SCI. XXXVII (1958) 161 THE DAKOTA FORMATION IN CENTRAL SOUTH DAKOTA John Paul Gries South Dakota School of Mines and Technology, Rapid City INTRODUCTION Historical summary. The sandstones and clays which make up the type section of the Dakota formation were described in 1853, and formally named Dakota in 1861 (1:419). The section in the type area of northeastern Nebraska was described as consisting of about 400 feet of sandstone, clays, and beds of impure lignite, separated from the overlying Greenhorn limestone by about 100 feet of Fort Benton (Graneros) shale. The entire sequence was identified as upper Cretaceous in age. Darton (2:20) correlated the upper sandstone of the Inyan Kara Group around the Black Hills with the type Dakota, and applied the name Dakota to the Hills area. He considered it to be upper Cretaceous, whereas he be- lieved the underlying Fuson and Lakota formations of the same group to be of lower Cretaceous age. These correlations were based largely upon paleobotanical evidence. A determination that the flora of the Dakota of the Black Hills area was lower Cretaceous led Russell (3:402) to restrict the name Dakota to the sand- stone of the type area, and to suggest the name Fall River for the upper member of the Inyan Kara Group around the Black Hills. He considered the true Dakota to be a near shore deposit of a sea which encroached east- ward over the old Sioux highland, forming a series of successively higher and younger sandstone lenses to the east. He stated that the sandstones of the type Dakota fingered out westward into the upper Cretaceous Graneros shales (4:10, 5:10), but this suggestion was largely ignored by subsequent geologists. Plants collected from the Newcastle sandstone around the Black Hills were identified by E. W. Berry (6) as Dakota forms. The significance of this identification was not immediately appreciated. Tester, in 1931 (7:284), after extensive study of the Dakota formation in Iowa and adjacent areas, con- cluded that the type Dakota was lower Cretaceous. An excellent summary of work done on the Dakota to that date is included in his paper. Subse- quently, in the Black Hills area, the lower-upper Cretaceous boundary was raised to the top of the Skull Creek shale by Reeside (8), and more recently to the top of the Mowry shale by Cobban and Reeside (9:1892-3). Recent work. The clue to the proper correlation in central South Da- kota was suggested when the Kadoka town water well was drilled in 1950. Howard Brady, consulting geologist, brought the electric log to the writer, 162 PROC. S. D. ACAD. SCI. XXXVII (1958) > 0 IAN R MB Z —J -CA u_ u ) RE u_ 0 0 a_ c:1 1 Z lit o Q w O cc 1 1 1 1 . x W cn (1) us x w cn (.1) w FM U Cr _J le < < V) M I W WWIX i u") 0 u) _J Cr W ORN W I— 0 > (1) —J CO w a .- E < _I 1 8 __Ji _1z 0 1-- 0 _I Cf) D _1 cn GREENH PROC. S. D. ACAD. SCI. XXXVII (1958) 163 with the comment that the resistivity curve of the waterbearing Dakota sandstone section closely resembled that of the Mowry shale section in western Nebraska. Sample studies, correlated with electric logs, soon showed that the shale below the Dakota sandstone in central South Dakota, then generally called Morrison, was really Skull Creek, and that the sandstones below that shale, which were being called Morrison, Sundance or even Pennsylvanian, were, in part at least, the equivalent of the Inyan Kara sandstones of the Black Hills outcrop area. The correlation indicated in Figure 1 was subsequently proposed. The Dakota formation, as the term is used in eastern and central South Dakota consists of a great blanket of sands and clays, underlain west of the dashed line on Figure 2 by the Skull Creek shale, and overlain by a variable amount of Belle Fourche (Upper Graneros) shale. East of the dashed line, the Skull Creek disappearb by thinning and by sanding up, so that there is recognizable only one thick sand and clay sequence, from the top of the Dakota sands to the base of the Inyan Kara Group. Even older sands may be included. Ii/most of the central part of the state, the top of the Dakota formation Figure 2. Isopach Map, Showing Thickness of Dakota Formation in Central South Dakota. Dashed Line Indicates Eastern Limit of Recogniz- able Skull Creek Shale. Area of Dakota Gas Outlined by Dotted Line 164 PROC. S. D. ACAD. SCI. XXXVII (1958) lies about 340 feet below the top of the Greenhorn limestone, but eastward, sands build up higher in the section. Electric log correlations by students at the School of Mines show that a conspicuous bentonite near the base of the Greenhorn formation (as defined by the U. S. Geological Survey), lies below the highest sandstones of the Dakota formation in eastern South Dakota. ECONOMIC CONSIDERATIONS i The concept of the Dakota sandstone as a huge delta deposit, separated from the Inyan Kara sandstones over most of the central part of the state by the Skull Creek shale, justifies a re-evaluation of the water, gas and oil potentials of the formation. Artesian water. In South Dakota, the first artesian well to the Dakota sandstone was drilled at Yankton in 1881. Literally thousands of wells were drilled east of the Missouri River within the next few decades. Yields of several hundred gallons per minute were not uncommon, and in some areas the pressure was so great that the flow was used as a source of power. Darton completed an extensive study of the Dakota artesian system in 1909 (2). He believed the Dakota sandstone to be continuous from the Black Hills outcrop area to the exposures in southeastern South Dakota. His belief was supported by pressure studies at that time which showed that the piezometric surface declined from an elevation of 2000 feet along a north- south line through the central part of the state to about 1100-1200 feet along the eastern edge. His indicated heads of 3000 feet or more around the Black Hills fit his overall picture, though it is now recognized that the source of that water was the stratigraphically lower Fall River sandstone. Russell (6), restudying Darton's data in light of his own geological interpretation of the Dakota formation, concluded that the water within the Dakota sandstones was largely connate, and that the artesian pressure was due entirely to compaction by overlying sediments. His suggestion as to the source of the artesian pressure was promptly criticized by Piper (11), Terzaghi (12), and Thompson (13). Under the present concept of the Dakota as a series of deltaic sands fingering out into shale to the west, the artesian system is certainly no longer the textbook example envisaged by Darton. He visualized the water entering at high elevation outcrops around the Black Hills, its eastward movement accompanied by a drop in pressure caused by friction of the water through the sandstone. But since the Dakota does not crop out around the Hills, except for the thin, fine sandstones which make up the Newcastle and higher "dike sandstones," the source of the artesian water must be less direct than Darton thought. It is still likely that the Black Hills form the intake area, but if so, the water must enter the sandstones of the Inyan Kara Group, move eastward through them, then find its way up into the higher sand- stones within the Dakota formation. Two possible routes are suggested. It may migrate eastward to where PROC. S. D. ACAD. SCI. XXXVII (1958) 165 the Skull Creek shale disappears, and all sandstones coalesce; then migrate back westward in the upper sandstones. Or it may move upward through fractures in the Skull Creek shale. If the former is true, the Dakota piezo- metric surface should drop westward from the feather edge of the Skull Creek shale (dashed line, Figure 2). It does not do so. If the second sugges- tion is valid, the Skull Creek shale, with a thickness of 100 to 200 feet, must be much more permeable than would normally be assumed. If neither of these is acceptable, the only obvious alternative is that the water is not moving, and that the pressure is due to weight of overlying sediments as suggested by Russell. The writer hesitates to accept this hypothesis as the principal source of artesian pressure within the Dakota sandstone. The first sandstones encountered beneath the Skull Creek shale in central South Dakota are usually fine-grained. Below them, or interbedded with the lower ones, are often some very coarse sands with grains in the granule and small pebble size ranges. The writer believes that these are basal Cretaceous, essentially continuous with the sands of the Inyan Kara Group around the Hills. They are commonly called "Sundance" sands. Some of these coarse sands have very high permeability, and contain water under very high hydrostatic pressures. These pressures must also be explained either by rather free communication with the Black Hills outcrops or by compaction. There are many earlier examples, but two recent instances point out the problems encountered when drilling into these high pressure permeable sandstones. The Hunt No. 1 State School Lands oil test in Sec. 24, T. 116 N., R. 73 W., Hyde County, was drilled in 1951. This hole was lost at 1940 feet, and was plugged successfully only because prompt and adequate engineering measures were applied.
Load more

Recommended publications
  • Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas
    Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas GEOLOGICAL SURVEY PROFESSIONAL PAPER 1253 Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas By WILLIAM A. COBBAN and E. A. MEREWETHER Molluscan Fossil Record from the Northeastern Part of the Upper Cretaceous Seaway, Western Interior By WILLIAM A. COBBAN Lower Upper Cretaceous Strata in Minnesota and Adjacent Areas-Time-Stratigraphic Correlations. and Structural Attitudes By E. A. M EREWETHER GEOLOGICAL SURVEY PROFESSIONAL PAPER 1 2 53 UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1983 UNITED STATES DEPARTMENT OF THE INTERIOR JAMES G. WATT, Secretary GEOLOGICAL SURVEY Dallas L. Peck, Director Library of Congress Cataloging in Publication Data Cobban, William Aubrey, 1916 Stratigraphy and paleontology of mid-Cretaceous rocks in Minnesota and contiguous areas. (Geological Survey Professional Paper 1253) Bibliography: 52 p. Supt. of Docs. no.: I 19.16 A. Molluscan fossil record from the northeastern part of the Upper Cretaceous seaway, Western Interior by William A. Cobban. B. Lower Upper Cretaceous strata in Minnesota and adjacent areas-time-stratigraphic correlations and structural attitudes by E. A. Merewether. I. Mollusks, Fossil-Middle West. 2. Geology, Stratigraphic-Cretaceous. 3. Geology-Middle West. 4. Paleontology-Cretaceous. 5. Paleontology-Middle West. I. Merewether, E. A. (Edward Allen), 1930. II. Title. III. Series. QE687.C6 551.7'7'09776 81--607803 AACR2 For sale by the Distribution Branch, U.S.
    [Show full text]
  • Hydrogeology and Stratigraphy of the Dakota Formation in Northwest Iowa
    WATER SUPPLY HYDROGEOLOGY AND J.A. MUNTER BULLETIN G.A. LUDVIGSON NUMBER 13 STRATIGRAPHY OF THE B.J. BUNKER 1983 DAKOTA FORMATION IN NORTHWEST IOWA Iowa Geological Survey Donald L. Koch State Geologist and Director 123 North Capitol Street Iowa City, Iowa 52242 IOWA GEOLOGICAL SURVEY WATER-SUPPLY BULLETIN NO. 13 1983 HYDROGEOLOGY AND STRATIGRAPHY OF THE DAKOTA FORMATION IN NORTHWEST IOWA J. A. Munter G. A. Ludvigson B. J. Bunker Iowa Geological Survey Iowa Geological Survey Donald L. Koch Director and State Geologist 123 North Capitol Street Iowa City, Iowa 52242 Foreword An assessment of the quantity and quality of water available from the Dakota (Sandstone) Formation 1n northwest Iowa is presented in this report. The as sessment was undertaken to provide quantitative information on the hydrology of the Dakota aquifer system to the Iowa Natural Resources Council for alloca tion of water for irrigation, largely as a consequence of the 1976-77 drought. Most area wells for domestic, livestock, and irrigation purposes only partial ly penetrated the Dakota Formation. Consequently, the long-term effects of significant increases in water withdrawals could not be assessed on the basis of existing wells. Acquisition of new data was based upon a drilling program designed to penetrate the entire sequence of Dakota sediments at key loca tions, after a thorough inventory and analysis of existing data. Definition of the distribution, thickness, and lateral and vertical changes in composition of the Dakota Formation has permitted the recognition of two mem bers. Additionally, Identification of the rock units that underlie the Dakota Formation has contributed greatly to our knowledge of the regional geology of northwest Iowa and the upper midwest.
    [Show full text]
  • Variability of Nanopore Systems in the Lincoln Limestone, Denver-Julesburg Basin, Colorado, Usa
    VARIABILITY OF NANOPORE SYSTEMS IN THE LINCOLN LIMESTONE, DENVER-JULESBURG BASIN, COLORADO, USA By Brandon Franklin Werner Chase B.A., University of Colorado, Boulder, 2016 Undergraduate Thesis submitted to the Faculty of the Undergraduate School of the University of Colorado’s Department of Geological Sciences 2016 Committee: David Budd – Geological Sciences – Advisor Charles Stern – Geological Sciences Tyler Lansford - Classics ABSTRACT: With a shift to exploiting unconventional petroleum plays in the United States to support energy consumption, understanding the nanopore systems in those unconventional resources becomes important for future exploitation. The goal of this study is to characterize the pore systems of the Cretaceous Lincoln Limestone found in the Denver-Julesburg (DJ) Basin in order to test the hypothesis that lithologic variability has a control on pore characteristics and total porosity. The Lincoln Limestone represents a possible reservoir interval in close proximity to a source interval, the Hartland Shale, which directly overlies it, thus making it a potentially profitable future exploration target. Pore networks in the Lincoln were characterized using AR-milled rock surfaces run through a scanning electron microscope (SEM) for image capture, image analysis with Avizio 9 software, and mineralogical characterization by X- Ray fluorescence (XRF). Seven samples were chosen for analysis from a single core taken from one well in the DJ basin. Five of the samples span the roughly 70-90 ft thick Lincoln Limestone and the other two come from right above and right below the Lincoln. The seven samples span the range of lithologic and porosity variability in the Lincoln Limestone. They have normalized volumes of carbonate that range from 6.0% to 70.6% (mostly as calcite); clay content ranges from 14.8% to 55.2%.
    [Show full text]
  • Blue River Valley Stratigraphic Chart
    Blue River Valley Hydrogeologic Geologic Period Phase Stratigraphic Unit Unit Modern Alluvium and outwash deposits Alluvial Aquifer Quaternary Glacial deposits Glacial deposits Glaciation Older stream and outwash terrace Local perched deposits aquifer Troublesome Formation Local aquifer Neogene Extension Volcanic rocks Volcanics Paleogene Transition Paleogene and Cretaceous intrusive Crystalline rocks bedrock Laramide Pierre Shale Smoky Hill Member Fort Hayes Limestone Pierre confining Niobrara Niobrara Formation Cretaceous unit Interior Carlile Shale Seaway Greenhorn Limestone Graneros Shale Benton Group Dakota Sandstone Dakota Aquifer Morrison Formation Morrison Aquifer Jurassic Mesozoic Entrada Sandstone Entrada Aquifer Sandstones Chinle confining Triassic Chinle Formation unit Permian Maroon Formation Ancestral Maroon-Minturn Rocky Aquifer Mountains Minturn Formation Pennsylvanian Mississippian No strata Devonian Chaffee Group Paleozoic Silurian Mississippian- Carbonates Cambrian Ordovician Manitou Formation carbonate aquifer Dotsero Formation and Cambrian Sawatch Sandstone Crystalline rocks of igneous and Crystalline Precambrian Precambrian metamorphic origin in mountainous bedrock region Table 12a-05-01. Blue River Valley stratigraphic chart. Blue River Valley Unit Thickness Hydrogeologic Geologic Period Phase Stratigraphic Unit Physical Characteristics Hydrologic Characteristics (ft) Unit Well to poorly-sorted, uncemented sands, silts and gravels along modern Modern Alluvium and outwash deposits >35 Alluvial Aquifer streams and
    [Show full text]
  • The Cretaceous System in Central Sierra County, New Mexico
    The Cretaceous System in central Sierra County, New Mexico Spencer G. Lucas, New Mexico Museum of Natural History, Albuquerque, NM 87104, [email protected] W. John Nelson, Illinois State Geological Survey, Champaign, IL 61820, [email protected] Karl Krainer, Institute of Geology, Innsbruck University, Innsbruck, A-6020 Austria, [email protected] Scott D. Elrick, Illinois State Geological Survey, Champaign, IL 61820, [email protected] Abstract (part of the Dakota Formation, Campana (Fig. 1). This is the most extensive outcrop Member of the Tres Hermanos Formation, area of Cretaceous rocks in southern New Upper Cretaceous sedimentary rocks are Flying Eagle Canyon Formation, Ash Canyon Mexico, and the exposed Cretaceous sec- Formation, and the entire McRae Group). A exposed in central Sierra County, southern tion is very thick, at about 2.5 km. First comprehensive understanding of the Cretaceous New Mexico, in the Fra Cristobal Mountains, recognized in 1860, these Cretaceous Caballo Mountains and in the topographically strata in Sierra County allows a more detailed inter- pretation of local geologic events in the context strata have been the subject of diverse, but low Cutter sag between the two ranges. The ~2.5 generally restricted, studies for more than km thick Cretaceous section is assigned to the of broad, transgressive-regressive (T-R) cycles of 150 years. (ascending order) Dakota Formation (locally deposition in the Western Interior Seaway, and includes the Oak Canyon [?] and Paguate also in terms of Laramide orogenic
    [Show full text]
  • Geology and Coal Resources of the Upper Cretaceous Fruitland Formation, San Juan Basin, New Mexico and Colorado
    Chapter Q National Coal Resource Geology and Coal Resources of the Assessment Upper Cretaceous Fruitland Formation, San Juan Basin, New Mexico and Colorado Click here to return to Disc 1 By James E. Fassett1 Volume Table of Contents Chapter Q of Geologic Assessment of Coal in the Colorado Plateau: Arizona, Colorado, New Mexico, and Utah Edited by M.A. Kirschbaum, L.N.R. Roberts, and L.R.H. Biewick U.S. Geological Survey Professional Paper 1625–B* 1 U.S. Geological Survey, Denver, Colorado 80225 * This report, although in the USGS Professional Paper series, is available only on CD-ROM and is not available separately U.S. Department of the Interior U.S. Geological Survey Contents Abstract........................................................................................................................................................Q1 Introduction ................................................................................................................................................... 2 Purpose and Scope ............................................................................................................................. 2 Location and Extent of Area............................................................................................................... 2 Earlier Investigations .......................................................................................................................... 2 Geography............................................................................................................................................
    [Show full text]
  • Mesozoic Stratigraphy at Durango, Colorado
    160 New Mexico Geological Society, 56th Field Conference Guidebook, Geology of the Chama Basin, 2005, p. 160-169. LUCAS AND HECKERT MESOZOIC STRATIGRAPHY AT DURANGO, COLORADO SPENCER G. LUCAS AND ANDREW B. HECKERT New Mexico Museum of Natural History and Science, 1801 Mountain Rd. NW, Albuquerque, NM 87104 ABSTRACT.—A nearly 3-km-thick section of Mesozoic sedimentary rocks is exposed at Durango, Colorado. This section con- sists of Upper Triassic, Middle-Upper Jurassic and Cretaceous strata that well record the geological history of southwestern Colorado during much of the Mesozoic. At Durango, Upper Triassic strata of the Chinle Group are ~ 300 m of red beds deposited in mostly fluvial paleoenvironments. Overlying Middle-Upper Jurassic strata of the San Rafael Group are ~ 300 m thick and consist of eolian sandstone, salina limestone and siltstone/sandstone deposited on an arid coastal plain. The Upper Jurassic Morrison Formation is ~ 187 m thick and consists of sandstone and mudstone deposited in fluvial environments. The only Lower Cretaceous strata at Durango are fluvial sandstone and conglomerate of the Burro Canyon Formation. Most of the overlying Upper Cretaceous section (Dakota, Mancos, Mesaverde, Lewis, Fruitland and Kirtland units) represents deposition in and along the western margin of the Western Interior seaway during Cenomanian-Campanian time. Volcaniclastic strata of the overlying McDermott Formation are the youngest Mesozoic strata at Durango. INTRODUCTION Durango, Colorado, sits in the Animas River Valley on the northern flank of the San Juan Basin and in the southern foothills of the San Juan and La Plata Mountains. Beginning at the northern end of the city, and extending to the southern end of town (from north of Animas City Mountain to just south of Smelter Moun- tain), the Animas River cuts in an essentially downdip direction through a homoclinal Mesozoic section of sedimentary rocks about 3 km thick (Figs.
    [Show full text]
  • Reservoir Characterization of the Cretaceous Cedar Mountain and Dakota Formations, Southern Uinta Basin: Year-One Report
    Reservoir Characterization of the Cretaceous Cedar Mountain and Dakota Formations, Southern Uinta Basin: Year-One Report Mary L. McPherson McPherson Geologic Consulting 86 South 3500 West Vernal, UT 84078 435-781-8025 [email protected] Brian S. Currie Department of Geology 114 Shideler Hall Miami University Oxford, OH 45056 513-529-7578 [email protected] Justin S. Pierson Department of Geology 114 Shideler Hall Miami University Oxford, OH 45056 513-529-3216 [email protected] This open-file report was prepared by the authors under contract to the Utah Department of Natural Resources, Utah Geological Survey. The report has not undergone the full UGS review process, and may not necessarily conform to UGS technical, editorial, or policy standards. Therefore, it may be premature for an individual or group to take action based on its content. The Utah Department of Natural Resources, Utah Geological Survey, makes no warranty, expressed or implied, regarding the suitability of this product for a particular use. The Utah Department of Natural Resources, Utah Geological Survey, shall not be liable under any circumstances for any direct, indirect, special, incidental, or consequential damages with respect to claims by users of this product. Open-File Report 492 Utah Geological Survey a division of Utah Department of Natural Resources 2006 TABLE OF CONTENTS LIST OF FIGURES .........................................................................................................................i LIST OF TABLES.........................................................................................................................
    [Show full text]
  • Geologic Resources Inventory Map Document for Fort Larned National Historic Site
    U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Directorate Geologic Resources Division Fort Larned National Historic Site GRI Ancillary Map Information Document Produced to accompany the Geologic Resources Inventory (GRI) Digital Geologic Data for Fort Larned National Historic Site fols_geology.pdf Version: 6/26/2015 I Fort Larned National Historic Site Geologic Resources Inventory Map Document for Fort Larned National Historic Site Table of Contents Geologic R.e..s.o..u..r.c..e..s.. .I.n..v.e..n..t.o..r..y. .M...a..p.. .D..o..c..u..m...e..n..t....................................................................... 1 About the N..P..S.. .G...e..o..l.o..g..i.c. .R...e..s.o..u..r.c..e..s.. .I.n..v.e..n..t.o..r..y. .P...r.o..g..r.a..m........................................................... 2 GRI Digital .M...a..p.. .a..n..d.. .S..o..u..r.c..e.. .M...a..p.. .C..i.t.a..t.i.o..n............................................................................... 4 Map Unit Li.s..t.......................................................................................................................... 5 Map Unit De..s..c..r.i.p..t.i.o..n..s............................................................................................................. 6 Qal - Alluvi.u..m... .(.H..o..l.o..c..e..n..e..)............................................................................................................................................. 6 Qp - Uplan.d.. .in..t.e..r..m..i.t.t.e..n..t. .l.a..k.e.. .(..p..la..y..a..).. .d..e..p..o..s..it.s.. .(..la..t.e.. .P..l.e..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..)............................................................. 6 Qds - Eolia.n.. .d..u..n..e.
    [Show full text]
  • Late Cretaceous Stratigraphy of Black Mesa, Navajo and Hopi Indian Reservations, Arizona H
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/9 Late Cretaceous stratigraphy of Black Mesa, Navajo and Hopi Indian Reservations, Arizona H. G. Page and C. A. Repenning, 1958, pp. 115-122 in: Black Mesa Basin (Northeastern Arizona), Anderson, R. Y.; Harshbarger, J. W.; [eds.], New Mexico Geological Society 9th Annual Fall Field Conference Guidebook, 205 p. This is one of many related papers that were included in the 1958 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. Copyright Information Publications of the New Mexico Geological Society, printed and electronic, are protected by the copyright laws of the United States.
    [Show full text]
  • Page 1 South Dakota Geological Survey General Map 9 Kp Kp Kn Kc
    South Dakota Geological Survey General Map 9 100o N O R T 99 o H D A 98 o K O T A 97o 48 47 Kg 49 Kgr Kn 129 White Rock STATE OF SOUTH DAKOTA 1 1 50 Kn 0 2 Wgr 0 0 5 5 0 0 Kfh 0 M. Michael Rounds, Governor 7 1 0 New 5 1 Kp 5 0 1 g 0 7 Kc Kp 128 K 1 1 Effington Kfh 0 0 128 Artas 5 Hecla 0 Rosholt Pollock 7 0 Claire 1 128 0 1750 Long 0 150 City Kgr Kc 5 Kfh Lake Veblen 7 DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Kg Frederick Steven M. Pirner, Secretary Herreid 127 Kg 750 1 Britton 127 127 50 17 1 2 R O B E R T S Eureka 5 Kg C A M P B E L L 0 750 DIVISION OF FINANCIAL AND TECHNICAL ASSISTANCE Lake 1500 David Templeton, Director Mound 00 M C P H E R S O N City M 15 City Kp Kn 126 M A R S H A L L 1 75 0 126 0 5 Kp 126 7 Leola Kp 1 Sisseton 1500 Kp 00 GEOLOGICAL SURVEY 15 Kp Hillsview Claremont Westport Derric L. Iles, State Geologist Kfh 125 125 Wetonka Eden 0 500 Langford 125 1 150 1 Columbia 5 56 55 0 58 57 Kp 0 63 62 61 60 59 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 0 0 0 0 0 Hosmer 1 5 5 Peever 7 0 0 2 B R O W N 1 Kc 5 1 0 1 1 0 2 124 5 5 Mobridge 1 0 Glenham 124 1 12 124 75 50 0 Kp 10 M Kn Kp 00 Roslyn 0 Bedrock Geologic Map Showing 5 Pierpont 0 2 5 Grenville Selby Java 1 0 7 5 1 2 1 0 0 123 5 Bowdle Ipswich 5 7 2 Groton Kp 123 1 000 Kp 2 123 Wilmot Roscoe Aberdeen 1 Andover 1 Kn Kp 0 0 1 0 7 Configuration of the Bedrock 5 Kc 0 E D M U N D S D A Y Big Stone W A L W O R T H 122 Corona 1 City 5 122 0 Bristol 122 Ortley 0 Webster Wm Summit Akaska Warner Waubay Kgr 1 1250 Kg Surface in South Dakota 7 5 0 Kc Stratford Marvin Kp Wm Lowry 121 46 121 50 Butler 48 47 12 121 51 50 49 0 5 48 47 2 Verdon 49 1 52 51 50 Wm 53 52 51 Twin Milbank 0 M 5 East of the Missouri River 0 2 Brooks Hoven 5 1 Kn 1 2 000 F 0 1 00 Tolstoy 120 Kp 2 Kp 50 Lily 120 120 1750 12 G R A N T Onaka Cresbard Conde F 1250 Mellette Brentford F Chelsea South Kp Dennis W.
    [Show full text]
  • The Dakota Sandstone and Mancos Shale of the Eastern Side of San Juan Basin, New Mexico Carle H
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/11 The Dakota Sandstone and Mancos Shale of the eastern side of San Juan Basin, New Mexico Carle H. Dane, 1960, pp. 63-74 in: Rio Chama Country, Beaumont, E. C.; Read, C. B.; [eds.], New Mexico Geological Society 11th Annual Fall Field Conference Guidebook, 129 p. This is one of many related papers that were included in the 1960 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. Copyright Information Publications of the New Mexico Geological Society, printed and electronic, are protected by the copyright laws of the United States.
    [Show full text]