Heyl, A., A. F. Agnew, E. J. Lyons & C.H. Behre Jr. (1959), The geology of Upper Mississippi Valley Zinc-Lead District: U.S. Geological Survey Professional Paper 309, 310 p.

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	*(1963) Geology of the Platteville quadrangle, Wisconsin. Bulletin* Vol. 1123. US Geological Survey doi:10.3133/b1123e**	Report (volume)
	A ^^ Geology of the Platteville Quadrangle Wisconsin t v: i"Si "o ! O3 O DQ t £ O EU GEOLOGICAL...with the Wisconsin Geological and Natural History Survey 1123-E Geology of the Platteville Quadrangle...Quadrangle Wisconsin By ALLEN F. AGNEW GEOLOGY OF PARTS OF THE UPPER MISSISSIPPI VALLEY ZINC-LEAD DISTRICT GEOLOGICAL...BULLETIN 1123-E Prepared in cooperation with the Wisconsin Geological and Natural History Survey UNITED...sandstone____--_-_______.________________________ Platteville formation..._______-_._-___-___._._._____._.
	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...PROFESSIONAL PAPER 309 Prepared in cooperation with the Wisconsin Geological and Natural Histoyy Survey, the Iowa...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...St. Peter sandstone Platteville formation Decorah formation Galena dolomite Upper Ordovician series Maquoketa
	*(1906) Zinc and lead deposits of the upper Mississippi Valley. Bulletin* Vol. 294. US Geological Survey doi:10.3133/b294**	Report (volume)
	DEPOSITS Gi.OLOGI C4( SC, • OF THE 119629 UPPER MISSISSIPPI V ALL IgRA RY 13Y 1 I.� I� I A1.1\1-�...1 9 1) CONTENTS. Introduction � Location and area Historical sketch Bibliography Production_� Past...production� Lead Zinc � Present production Recent mining act ivitScope of this report � Topography. Relief...Limonite 51 � Melanterite 51 Gangue minerals� 51 � Calcite 51 � Dolomite 51 � Selenite 52 � Barite 52 � Quartz...stratigraphy—Continued. 67 � Ore deposits in the Platteville formation 67 � Ore deposits in the St. Peter
	Agnew, A.F., Heyl, A.V., Behre, C.H., Lyons, E.J. (1956) Stratigraphy of Middle Ordovician rocks in the zinc-lead district of Wisconsin, Illinois, and Iowa. Professional Paper 274k. US Geological Survey doi:10.3133/pp274k	Report (issue)
	Middle Ordovician Rocks in the Zinc-Lead District of Wisconsin, Illinois, and Iowa SURVEY PROFESSIONAL...PROFESSIONAL Prepared in cooperation with the Wisconsin Geological and Natural History Survey PAPER 274-K Stratigraphy...Middle Ordovician Rocks in the Zinc-Lead District of Wisconsin, Illinois, and Iowa By ALLEN F. AGNEW, ALLEN...PAPER 274-K Prepared in cooperation with the Wisconsin Geological and Natural History Survey UNITED...Stratigraphic problems. _________________________ Platteville-Decorah boundary _ _______________ Beloit dolomite
	*(1957, May) The Earth Science Digest* Vol. 10 (3) Earth Science Publishing Company**	Journal (issue)
	THE MIDWEST CONCLAVI 6 Galena, Sphalerite and Calcite; Efhgy Mounds National Monument; Pictured Rocks...the many side attraction t the Mid west Com at Platteville, will be a visit to the studios and showrooms...Illinois; Cedar Valley Rocks and Minerals Society Chicago Rocks and Minerals Society; Wisconsin Geological...attend our 1957 Midwest Field Trip Conclave, at Platteville, Wis., on June 27-30—on any or all of these dates...dates \| have been very tamuiliar with this area tor many years, and let me assure you that ther is
	*Beste, Bob (2005) Location Guide for Rockhounds in the United States* (3rd ed.) Vol. 3 - Part III - Ohio through Wyoming.**	Book (volume)
	although excavations in the underlying black, Upper Devonian (New Albany) shales occasionally produces...colored Vanport flint of the Flint Ridge and the Upper Mercer flint exposed in Hocking, Perry, and Coshocton...ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...MILFORD, area creek gravels and alluvial deposits, rare⎯Diamond. CLINTON COUNTY WILMINGTON, area of Todd’s...Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships of Washington, Virginia, Bedford,
	*Beste, Bob (1996) Location Guide for Rockhounds in the United States* (2nd ed.) Vol. 3 - Part III - Ohio to Wyoming.**	Book (volume)
	although excavations in the underlying black, Upper Devonian (New Albany) shales occasionally produces...colored Vanport flint of the Flint Ridge and the Upper Mercer flint exposed in Hocking, Perry, and Coshocton...ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...MILFORD, area creek gravels and alluvial deposits, rare⎯Diamond. CLINTON COUNTY WILMINGTON, area of Todd’s...Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships of Washington, Virginia, Bedford,
	*Beste, Bob (2014) Location Guide for Rockhounds in the United States* (4th ed.) Vol. 4 - Part IV - South Dakota through Wyoming.**	Book (volume)
	and a Southern Section, covering a somewhat larger area around Harney Peak. The northern section is characterized...beds, excavations, etc.Selenite roses. BRULE COUNTY AREA: in the Oacoma zone of the Pierre Fm. On Elm...gray Barite rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides...petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE:  area ridges, slopes, stream beds, etc. petrified...for Rock Hounds in the United States CUSTER COUNTY AREA: The November Mine, 1.2 mi. SE of the Needles
	Hansen, Wallace R., Crosby, Eleanor J., Shroba, R.R. (1982) Environmental geology of the Front Range urban corridor and vicinity, Colorado, with a section on physical properties and performance characteristics of surficial deposits and rock units in the Greater Denver area. Professional Paper 1230. US Geological Survey doi:10.3133/pp1230	Report (issue)
	SURFICIAL DEPOSITS and ROCK UNITS in the GREATER DENVER AREA By RALPH R. SHROBA GEOLOGICAL SURVEY PROFESSIONAL........................... Geographic factors and area . ........................... The topographic map........... ........................... Bench-and-valley uplands ............................... Low rolling......................... Present distribution of upper Paleozoic to middle Mesozoic rocks ....................... Present distribution of pre-Laramide, upper Mesozoic rocks . . Latest Cretaceous to early Eocene