The 25 road guides of Roadside Geology of Ohio, complete with 59 maps and figures and 172 photographs, lead you from one corner of the state to the other-from the flat till plains of the west to the hilly eastern Allegheny Plateau, and from the Ohio River valley to the Lake Erie shoreline. Mark Camp's clear writing explains how caverns and disappearing streams for in karst; why mud cracks, ripple marks, and cross-bedding layers are entombed in sedimentary rock; and how grooves up to 10 feet deep were gouged into the limestone of Kelleys Island. From deserted boomtowns to Ohio's big cities, Roadside Geology of Ohio thoroughly reveals the Buckey State's fascinating and dynamic geology.
6x9 inchses, Pages: 416, Published 2006
Illinois--a flat and boring state with nothing but cornfields and crowded expressways, right? Balderdash! Geology Underfoot in Illinois scratches the Prairie State's surface to expose geologic diversity that stretches back more than a billion years.
Copious illustrations and witty, page-turning prose guide readers on geologic walking or driving tours of thirty-seven sites in Illinois. Enjoy an unexpected exploration of Chicago's architectural geology. Embark on a fault-seeking expedition in Mark Twain's big-river country. Or try moraine-surfing on Interstates 55 and 74. With a touch of curiosity and Geology Underfoot in Illinois in hand, you will view the state with a new sense of wonder.
The Deluxe Moh's Hardness Pick Set now comes in two case types. The wooden case is small enough to carry and the top screws into the base to make a perfect desk stand. The plastic case is longer but the thinner size makes it easier to carry in your field tool set.Hardness is an important and quantifiable physical characteristic of a mineral and in your effort to identify an unknown mineral, the hardness, if known, combined with other properties, can narrow your search to just a handful of possibilities. Simply scratch a smooth surface of your unknown mineral with the picks of various indicated hardness. As an example, if a No. 5 pick scratches the mineral, but a No. 4 pick does not, then your mineral hardness is 4.5. Then compare this against a table of minerals listing hardness values to aid in identifying the unknown mineral.
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