Iowa's Minerals

Their Occurrence, Origins, Industries, and Lore

Author: Paul Garvin

Publisher: University of Iowa Press

ISBN: 9781609380144

Category: Nature

Page: 256

View: 6971

Iowa Gems and Minerals in Your Pocket

Author: Paul Garvin,Anthony Plaut

Publisher: University of Iowa Press

ISBN: 1609381017

Category: Nature

Page: 16

View: 5009

From the spiky teeth of a geode containing sparkling quartz crystals, the rich browns and golds of smoky quartz and goethite needles on calcite, and the coral-like branches of plumose barite to the abstract reds and whites of polished agate cabochons, world-class mineral crystals are harvested from the rocks of the Hawkeye State. Collecting these high-quality crystals requires access to active mines, pits, and quarries, and individual collectors are rarely allowed entrance to these facilities. With information about each specimen’s type, source, size, and current location, Paul Garvin and Anthony Plaut’s Iowa Gems and Minerals in Your Pocket provides access to the glittering, gleaming world of Iowa crystals. Most, if not all, of Iowa’s gems and minerals are products of crystallization in underground cavities that filled with water containing dissolved chemicals. The famed Iowa geodes (Iowa’s state rock) are products of a complex process of replacement and cavity-filling in the Warsaw Shale. Armored by a rind of tough chalcedonic quartz, these spheroidal masses, which range up to more than a meter across, weather out of the host rock and accumulate along streams in the southeastern part of the state. During the Pleistocene Epoch, large masses of glacial ice rafted the ultra-fine-grained variety of quartz called Lake Superior agates, which had previously weathered out of their host rocks, southward into Iowa. They can be found in the gravels that have accumulated along major streams in the eastern half of the state. Iowa’s long record of mining lead, coal, gypsum, and limestone contains a rich history; the forty-seven mineral specimens inIowa Gems and Minerals in Your Pocketmake up a fascinating illustrated guide to that history. Carefully lit and photographed to reveal both maximum detail and maximum beauty, each specimen becomes a work of art.

Iowa Underground

A Guide to the State's Subterranean Treasures

Author: Greg A. Brick

Publisher: Big Earth Publishing

ISBN: 9781931599399

Category: Travel

Page: 223

View: 3039

Take a mysterious and fascinating tour through Iowa's underground treasures. This guide will reveal the state's subterranean attractions including show and wild caves, springs, mining sites and other geological and man-made sites. Includes fun stories and legends about cave fairies, trolls and ghost towns."

Iowa's Geological Past

Three Billion Years of Earth History

Author: Wayne I. Anderson

Publisher: University of Iowa Press

ISBN: 9781587292675

Category: History

Page: 424

View: 4120

Iowa's rock record is the product of more than three billion years of geological processes. The state endured multiple episodes of continental glaciation during the Pleistocene Ice Age, and the last glacier retreated from Iowa a mere (geologically speaking) twelve thousand years ago. Prior to that, dozens of seas came and went, leaving behind limestone beds with rich fossil records. Lush coal swamps, salty lagoons, briny basins, enormous alluvial plains, ancient rifts, and rugged Precambrian mountain belts all left their mark. In "Iowa's Geological Past, " Wayne Anderson gives us an up-to-date and well-informed account of the state's vast geological history from the Precambrian through the end of the Great Ice Age. Anderson takes us on a journey backward into time to explore Iowa's rock-and-sediment record. In the distant past, prehistoric Iowa was covered with shallow seas; coniferous forests flourished in areas beyond the continental glaciers; and a wide variety of animals existed, including mastodon, mammoth, musk ox, giant beaver, camel, and giant sloth. The presence of humans can be traced back to the Paleo-Indian interval, 9,500 to 7,500 years ago. Iowa in Paleozoic time experienced numerous coastal plain and shallow marine environments. Early in the Precambrian, Iowa was part of ancient mountain belts in which granite and other rocks were formed well below the earth's surface. The hills and valleys of the Hawkeye State are not everlasting when viewed from the perspective of geologic time. Overall, Iowa's geologic column records an extraordinary transformation over more than three billion years. Wayne Anderson's profusely illustrated volume provides a comprehensive and accessible survey of the state's remarkable geological past.

The Guide to Iowa's State Preserves

Author: Ruth Herzberg,John A. Pearson

Publisher: University of Iowa Press

ISBN: 1609380088

Category: Travel

Page: 214

View: 3937

The Iowa state preserves system was created in 1965; a decade later, thirty preserves had been dedicated, including “six native prairies, a native White Pine stand, the state's only Sphagnum bog, a Balsam Fir stand, some of the oldest exposed rock outcrops in the world, an ancient fort, a fen, several Indian mound groups and a historical cemetery.” This new guide to all ninety Iowa state preserves—biological, geological, archaeological, historical, and scenic—describes the state's most treasured prairies and forests, quartzite outcrops and ice caves, and Indian mounds and wetlands as well as such historic sites as Fort Atkinson and Montauk. Each entry includes two-color, progressively scaled maps giving the location of the preserve within the state, within its county, relative to a nearby town (with a recommended driving route), and on the local landscape (using USGS 7.5-minute topo maps). Also included are written directions (using 911 street names and signs); a description of the preserve's size, features, and history; a list of nearby or similar preserves, parks, natural areas, and other attractions; recommended readings; and contact information. (There are a few exceptions for privately owned or fragile preserves.) For travelers, a map in the introduction numbers all the preserves both geographically and alphabetically by name. Although the preserves system emphasizes preservation rather than recreation, some preserves do have formal trails; some allow hunting, horseback riding, and canoeing; a few have museums or nature centers. This comprehensive guide allows visitors to plan active and informative visits to sites that highlight Iowa's natural and cultural heritage.

Reports and Papers

Author: Iowa Geological Survey

Publisher: N.A

ISBN: N.A

Category:

Page: N.A

View: 5549

Landforms of Iowa

Author: Jean Cutler Prior

Publisher: University of Iowa Press

ISBN: 9781587291951

Category: Science

Page: 165

View: 4352

Coal Deposits of Iowa

Author: Charles Rollin Keyes

Publisher: N.A

ISBN: N.A

Category: Coal

Page: 536

View: 1425

History of the Louisiana Purchase Exposition

Comprising the History of the Louisiana Territory, the Story of the Louisiana Purchase and a Full Account of the Great Exposition, Embracing the Participation of the States and Nations of the World, and Other Events of the St. Louis World's Fair of 1904; Comp. from Official Sources

Author: Mark Bennitt,Frank Parker Stockbridge

Publisher: N.A

ISBN: N.A

Category: Louisiana

Page: 800

View: 7373

Flashfall

Author: Jenny Moyer

Publisher: Henry Holt and Company (BYR)

ISBN: 1627794824

Category: Young Adult Fiction

Page: 352

View: 419

Orion is a Subpar, expected to mine the tunnels of Outpost Five, near the deadly flash curtain. For generations, her people have chased cirium—the only element that can shield humanity from the curtain’s radioactive particles. She and her caving partner Dram work the most treacherous tunnel, fighting past flash bats and tunnel gulls, in hopes of mining enough cirium to earn their way into the protected city. But when newcomers arrive at Outpost Five, Orion uncovers disturbing revelations that make her question everything she thought she knew about life on both sides of the cirium shield. As conditions at the outpost grow increasingly dangerous, it’s up to Orion to forge a way past the flashfall, beyond all boundaries, beyond the world as she knows it.