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RESOURCES
Book
References
Ladd, Doug, 1995, Tallgrass
Prairie Wildflowers A Falcon Field Guide, Helena, Montana
Krehret, Roger, 1986, Crystal
Lake Cave Pamphlet, Chatfield, Minnesota
Prior, Jean C. et al, 1991,
Natural and Cultural History of the Mines of Spain, Iowa
Department of Natural
Resources, Iowa City
Witze, Brian J. et al, 1997,
Geology in the Dubuque Area, Iowa Department of Natural
Resources, Iowa City
Internet
Sources
Crystal Lake Cave
(Information
from history to description of the cave including photographs of cave
formations.Also provides
directions to park and times and hours the cave is open) http://www.crystallakecave.com/
DesertUSA
(Various
definitions of cave formations and explanations of karst topography)
http://www.desertusa.com/mag99/feb/papr/speleothems.html
(Background
information on the description of the mineral calcite)
http://www.desertusa.com/mag98//nov/papr/geo_calcite.html
History of Dubuque Iowa
(General
facts regarding the history of Dubuque, as well as showing key attractions such
as Crystal Lake Cave and Mines of Spain Recreation Area.)
http://www.dubuque.org/
Iowa Geological Survey Bureau
(Acquire
basic information on land use in Iowa, data on mineral and water resources,
including various maps of the geology of Iowa and much moreÖ
http://www.igsb.uiowa.edu/
Iowa Department of Natural Resources
(Overall information on
forests and prairies, as well as fish and wildlife facts along with
environmental protection
http://www.state.ia.us/government/dnr/
Lead and Zinc Mining in the Dubuque Area
(Further
knowledge of the historical significance in the Dubuque area and in-depth
information concerning lead and zinc mining including old photographs of a road
collapsing and a structure built on top of a vertical zinc mine shaft)
http://www.igsb.uiowa.edu/browse/leadzinc/leadzinc.htm
Mines of Spain
(Overview of the history
of the area, location and hours listed, description of trails, along with a
summary of the Horseshoe Bluff region can be acquired at this site. A map of the
recreation area can also be obtained.)
http://www.state.ia.us/dnr/organiza/ppd/minesof.htm
National Caves Association
(Further information on
different caves and caverns in various location. Explanation to the reason of
visiting caves.
http://www.cavern.com/
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