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.

Garvin begins with a brief treatment of the origins of Iowa's minerals, moving from the oldest - with ages well in excess of a billion years - to those most recently formed. He describes the state's major mineral occurrences, providing detailed information for both specialists and amateurs, including how to obtain access to collecting sites.

State chapters from this publication are designed to provide statistical data and information for mineral commodities on a State-by-State basis. Additional chapters include a statistical summary and survey methods for nonfuel minerals. Audience: Geologists, trade persons working with, and buying, metals and minerals, economists, and members of the general public with an interest in the most accurate information about metals and minerals statistics in different states will want to get this official government publication from the Minerals Yearbook series. Related products: Other printed volumes in the Minerals Yearbook series can be found here: https: //bookstore.gpo.gov/catalog/science-technology/minerals-metals/minerals-yearbook Mineral Yearbook series printed volumes are available on a Standing Order basis. To learn more about our Standing Order program, please refer to the information contained within this link under Standing Orders: https: //bookstore.gpo.gov/standing-orders-0 Minerals and Metals resources collection is available here: https: //bookstore.gpo.gov/catalog/science-technology/minerals-metals Mining & Drilling collection is available here: https: //bookstore.gpo.gov/catalog/science-technology/mining-drilling

State chapters from this publication are designed to provide statistical data and information for mineral commodities on a State-by-State basis. Additional chapters include a statistical summary and survey methods for nonfuel minerals. Audience: Geologists, trade persons working with, and buying, metals and minerals, economists, and members of the general public with an interest in the most accurate information about metals and minerals statistics in different states will want to get this official government publication from the Minerals Yearbook series. Related products: Other printed volumes in the Minerals Yearbook series can be found here: https: //bookstore.gpo.gov/catalog/science-technology/minerals-metals/minerals-yearbook Minerals and Metals resources collection is available here: https: //bookstore.gpo.gov/catalog/science-technology/minerals-metals Mining & Drilling collection is available here: https: //bookstore.gpo.gov/catalog/science-technology/mining-drilling "

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.

In 1949, Iowa farm wife Evelyn Birkby began to write a weekly column entitled “Up a Country Lane” for the Shenandoah Evening Sentinel, now called the Valley News. Sixty-three years, one Royal typewriter, and five computers later, she is still creating a weekly record of the lives and interests of her family, friends, and neighbors. Her perceptive, closely observed columns provide a multigenerational biography of rural and small-town life in the Midwest over decades of change. Now she has sifted through thousands of columns to give us her favorites, guaranteed to delight her many longtime and newfound fans. Evelyn begins with her very first column, whose focus on the Christmas box prepared by a companionable group of farm wives, the constant hard work of farming, and an encounter with an elderly stranger over a yard of red gingham sets the tone for future columns. Optimistic even in the wake of sorrow, generous-spirited but not smug, humorous but not folksy, wise but not preachy, Evelyn welcomes the adventures and connections that each new day brings, and she masterfully shares them with her readers. Tales of separating cream on the back porch at Cottonwood Farm, raising a teddy bear of a puppy in addition to a menagerie of other animals, surviving an endless procession of Cub and Boy Scouts, appreciating a little boy’s need to take his toy tractor to church, blowing out eggs to make an Easter egg tree, shopping for bargains on the day before Christmas, camping in a converted Model T “house car,” and adjusting to the fact of one’s tenth decade of existence all merge to form a world composed of kindness and wisdom with just enough humor to keep it grounded. Recipes for such fare as Evelyn’s signature Hay Hand Rolls prove that the young woman who was daunted by her editor’s advice to “put in a recipe every week” became a talented cook. Each of the more than eighty columns in this warmhearted collection celebrates not a bygone era tinged with sentimentality but a continuing tradition of neighborliness, Midwest-nice and Midwest-sensible.

The Middle Proterozoic Midcontinent Rift System (MRS) of North America is a failed rift that formed in response to region-wide stresses about 1,100 Ma. In Iowa, the MRS is buried beneath 2,200-3,500 ft of Paleozoic and Mesozoic sedimentary rocks and Quaternary glaciogenic deposits. An extremely large volume of sediments was deposited within basins associated with the rift at several stages during its development. Although the uplift of a rift-axial horst resulted in the erosional removal of most of these clastic rocks from the central region of the MRS in Iowa, thick sequences are preserved in a series of horst-bounding basins. Recent studies incorporating petrographic analysis, geophysical modeling, and other analytical procedures have led to the establishment of a preliminary stratigraphy for these clastic rocks and interpretations of basin geometries. This information has allowed the refinement of existing theories and history of MRS formation in Iowa. Additionally, drill samples previously interpreted as indicating the existence of early Paleozoic basins overlying the Proterozoic MRS basins were re-examined. Samples previously interpreted as deep-lying Paleozoic rocks are now known to have caved from upper levels of the drillhole and were out of stratigraphic position. No deep Paleozoic basins exist in this area. These investigations led to the development of petrographic parameters useful in differentiating the Proterozoic MRS Red clastics from Paleozoic clastic rocks having similar lithologies.

Your Must-Have Guide to the Rocks and Minerals of Wisconsin, Illinois and Iowa Get the perfect guide to rocks and minerals in the Heartland This book by Dan R. Lynch and Bob Lynch features comprehensive entries for 96 rocks and minerals of Wisconsin, Illinois and Iowa, from common rocks to rare finds. Learn from the fascinating information about everything from agates to zircon and fossils to gold. The easy-to-use format means you'll quickly find what you need to know and where to look. The authors' incredible, sharp, full-color photographs depict the detail needed for identification--no need to guess from line drawings. With this field guide in hand, identifying and collecting is fun and informative.

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. If you are a sport caver, a scientist, or curious tourist, this guide will give you all you need to know to begin exploring Iowa's underground world. IN THIS BOOK YOU'LL FIND - Detailed directions with helpful tips and precautions. - Descriptions of various lead- and coal-mining museums. - Fun stories and legends, including cave fairies, trolls, and ghost towns. - Additional information about Iowa's coal-mining past. - Facts about underground biological life. "A uniquely written perspective on the underground wonders of Iowa, by a premier Midwest cave historian." --Gary K. Soule, Speleo Historian and Trustee, American Spelean History Association