	Heyl, Allen V., Agnew, Allen F., Lyons, Erwin J., Behre, Charles H., Flint, Arthur E. (1959) The Geology of the Upper Mississippi Valley Zinc-Lead District. Professional Paper 309. US Geological Survey doi:10.3133/pp309	Report (issue)
	The Geology of the Upper Mississippi Valley Zinc-Lead District By ALLEN V. HEYL, Jr., ALLEN F. AGNEW...cooperation with the Wisconsin Geological and Natural Histoyy Survey, the Iowa Geological Survey, and...Cultural development and facilities related to mining Field work and acknowledgments Scope of the report...geologic work in the district Geology Stratigraphy Precambrian rocks Cambrian system Upper Cambrian series...system Lower Ordovician series Prairie du Chien group Middle Ordovician series St. Peter sandstone Platteville
	*Gutstadt, Allan M. (1958) Cambrian and Ordovician Stratigraphy and Oil and Gas Possibilities in Indiana. Bulletin* 14. Indiana Geological Survey**	Report (issue)
	1 Petrol um Section Library CAMBRIAN AND ORDOVICIAN STRATIGRAPHY AND OIL AND GAS POSSIBILITIES IN INDIANA...Department of Conservation GEOLOGICAL SURVEY Bulletin No. 14 1958 STATE OF INDIANA HAROLD W. HANDLEY...CHARLES F. DEISS, STATE GEOLOGIST BLOOMINGTON BULLETIN NO. 14 CAMBRIAN AND ORDOVICIAN STRATIGRAPHY AND OIL............................. St. Croixan series (Upper Cambrian) ................................... Red...sandstone ......................... . Knox dolomite (Upper Cambrian and Lower Ordovician) ................
	*Emmons, S.F., Irving, J.D., Loughlin, G.F. (1927) Geology and ore deposits of the Leadville mining district, Colorado. Professional Paper* 148. US Geological Survey doi:10.3133/pp148**	Report (issue)
	GEOLOGY AND ORE DEPOSITS OF TILE LEADVILLE MINING DISTRICT, COLORADO BY S. F. EMMONS, J. D. IRVING,... CONTENTS Page XI[ Summary _ 1 Introduction _ Part I. Superficial features _ 5 Chapter 1. Geography _ 5 Location...Interglacial stage _ 9 Glaciers of the last stage _ 10 Iowa Gulch glacier_ 10 Evans Gulch glacier _ 10 Effects...Arkansas glacier _ 14 North_ lateral_ moraine_ of Iowa Gulch glacier _ 15 Glacio-fluviatile deposits_ 15...52 Forms of intrusive bodies_ 87 Pendery fault group _ 52 Sills or sheets _ Pendery fault _ 87 54 Dikes
	(1922) Contributions to economic geology, 1921, Part I, Metals and nonmetals except fuels--Ore deposits of the Sierrita Mountains, Pima County, Arizona. Bulletin Vol. 725 (725j) US Geological Survey doi:10.3133/b725j	Report (issue)
	ORE DEPOSITS OF THE SIERRITA MOUNTAINS, PIMA COUNTY, ARIZONA. By F. L. RANSOME. INTRODUCTION. The Sierrita...Arizona. They separate the Santa Cruz Valley on the east from Altar Valley on the west. The range has a length...determined. Apparently no part of the range rises more than 2,000 or 3,000 feet above the upper margin of the...feet above sea level. Its slopes carry little or no timber, and in comparison with the Santa Rita Mountains...foothills, is a group of prospects within what is locally known as the Papago district, although they
	*(1907) Economic geology of the Amity quadrangle, eastern Washington County, Pennsylvania. Bulletin* Vol. 300. US Geological Survey doi:10.3133/b300**	Report (volume)
	GEOLOGY OF THE AMITY QUADRANGLE EASTERN WASHINGTON COUNTY PENNSYLVANIA BY FREDERICK G. CLAP? WASHINGTON...(Dunkard group or Permian series)..................................................... The group as a whole..... Division of the group.................................. Rocks above the Upper Washington limestone.................... Rocks between the top of the Upper Washington limestone and thetopof the Waynesburg................. , Character and thickness ....... 1....................... Distribution .............
	*Lesure, Frank Gardner (1968) Mica deposits of the Blue Ridge in North Carolina. Professional Paper* 577. US Geological Survey doi:10.3133/pp577**	Report (issue)
	Pecora, Director Library of Congress catalog-card No. OS 67-295 For sale by the Superintendent of Documents...Granite and nonlayered granitic gneiss._______ Upper Precambrian rocks______________________ Bakersville...sedimentary rocks____________________ Chilhowee Group.__________________________ Rocks of the Murphy marble..._______ Muscovite granodiorite of Spruce Pine district-_____ ________________________ Pegmatite. ___...Jefferson-Boone district. _______ Wilkes district __ _ _______----Spruce Pine district- ___________ Buncombe
	*Baldwin, Brewster, Muehlberger, W. R. (1960) Geologic studies of Union County, New Mexico. Bulletin* 63. New Mexico Bureau of Geology and Mineral Resources doi:10.58799/b-63**	Report (issue)
	NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY Geologic Studies of Union County, New Mexico by Brewster...Muehlberger SOCORRO 1959 NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY KENNETH W. FORD, President NEW MEXICO...Director, Bus.-Pub. Office JAMES M. ROBERTSON, Mining Geologist KATHY C. EDEN, Editorial Technician GRETCHEN...GRETCHEN H. ROYBAL, Coal Geologist ROBERT W. EVELETH, Mining Engineer AMY SHACKLETT, Asst. Lab Biotechnologist...Authority of State of New Mexico, NMSA 1953 Sec. 63 -1- 4 Printed by University of New Mexico Printing Plant
	*Kier, Porter M. (1967) Revision of the Oligopygoid Echinoids. Smithsonian Miscellaneous Collections* Vol. 152 (2) The Smithsonian Institution**	Journal (issue)
	BALTIMORE, MD., U. S. A- CONTENTS Page Introduction 1 Acknowledgments Morphology Ambulacra 2 2 2 2 Petals...36 Plates) INTRODUCTION The oligopygoids are a group of echinoids of the Caribbean and Florida. holectypoids...Previously, very little was known of the lantern in this group. It now has been possible to expose many lanterns...but never from both in the same species. This group, although similar to the clypeasteroids in many...COLLECTIONS, VOL. 152, NO. 2 SMITHSONIAN MISCELLANEOUS COLLECTIONS 2 The VOL. 1 52 two genera, Oligopygus

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Calcite from Clark No. 1 Mine, Clark Mine Group, Highland area, Upper Mississippi Valley Mining District, Iowa County, Wisconsin, USA

Calcite from
Clark No. 1 Mine, Clark Mine Group, Highland area, Upper Mississippi Valley Mining District, Iowa County, Wisconsin, USA