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Author : Iowa Geological Survey
Publisher : Unknown
Page : 128 pages
File Size : 51,8 Mb
Release : 1913
Category : Electronic
ISBN : OCLC:229418042
Author : Anonim
Publisher : Unknown
Page : 128 pages
File Size : 44,5 Mb
Release : 1901
Category : Geology
ISBN : LCCN:sn93014194
Author : Iowa Geological Survey
Publisher : Unknown
Page : 128 pages
File Size : 54,8 Mb
Release : 1893
Category : Geology
ISBN : OCLC:7166093
Author : Iowa Geological Survey
Publisher : Unknown
Page : 0 pages
File Size : 53,8 Mb
Release : 1893
Category : Electronic
ISBN : OCLC:1367320956
Author : Iowa Geological Survey
Publisher : Unknown
Page : 560 pages
File Size : 55,9 Mb
Release : 1887
Category : Geology
ISBN : PSU:000057499789
Author : Geological Surve Iowa Geological Survey
Publisher : Unknown
Page : 508 pages
File Size : 51,5 Mb
Release : 2006-09
Category : History
ISBN : 1425557074
Author : Anonim
Publisher : Unknown
Page : 514 pages
File Size : 55,8 Mb
Release : 1893
Category : Geology
ISBN : HARVARD:32044102939972
Author : Iowa Geological Survey
Publisher : Unknown
Page : 172 pages
File Size : 42,9 Mb
Release : 1901
Category : Geology
ISBN : LCCN:gs18000301
Author : Anonim
Publisher : Unknown
Page : 184 pages
File Size : 48,7 Mb
Release : 1918
Category : Geology
ISBN : PSU:000057737386
Author : Iowa Geological Survey
Publisher : Unknown
Page : 298 pages
File Size : 54,5 Mb
Release : 1868
Category : Geological surveys
ISBN : UCAL:B4173363
Author : Wayne I. Anderson
Publisher : University of Iowa Press
Page : 444 pages
File Size : 54,9 Mb
Release : 1998
Category : History
ISBN : 158729267X
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.
Author : Geological Survey (U.S.)
Publisher : Unknown
Page : 84 pages
File Size : 53,9 Mb
Release : 1895
Category : Geology
ISBN : HARVARD:32044106443617
Author : Jean Cutler Prior
Publisher : University of Iowa Press
Page : 172 pages
File Size : 41,8 Mb
Release : 1991
Category : Science
ISBN : 1587291959
Author : Charles Rollin Keyes
Publisher : Unknown
Page : 908 pages
File Size : 54,8 Mb
Release : 1913
Category : Geology
ISBN : OCLC:7166093
Author : Iowa Geological Survey
Publisher : Unknown
Page : 40 pages
File Size : 48,7 Mb
Release : 1978
Category : Geology
ISBN : RUTGERS:39030029628205