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Geotimes
March 2004
Megan Sever |
Wisconsin crater revealed In 1942, mappers doing reconnaissance work first noticed an anomalous geologic structure in western Wisconsin. Now geologists have determined that the feature is a 430- to 445-million-year-old meteorite impact structure.   |
Geotimes
January 2004
John E. Warme |
The Many Faces of the Alamo Impact Breccia The Alamo impact 370 million years ago resulted in one of the best-exposed and well-dated impact deposits and a full-scale physical model for understanding wet impacts: the Alamo Breccia. |
Geotimes
November 2003
Sara Pratt |
Tracing the Navajo sandstone The thick Navajo sandstone in Zion National Park is one of the largest wind-deposited formations in the geologic record. Geologists have devised a new way to determine the origin of such sedimentary rocks. |
Geotimes
June 2004
Megan Sever |
Closing the Dating Gap Assigning dates to archaeological artifacts from the chronological gap may now be somewhat easier, thanks to a new method involving quartz crystals. |
Geotimes
March 2004
E-an Zen |
The Marriage of Geology and Philosophy This slim volume deals with the public role of earth science in contemporary society. What it has to say should concern not only public-minded earth scientists and those engaged in policy-making, but those who care about the relations between science and the humanities |
Geotimes
October 2005
Jon L. Rau |
Teaching Urban Geology From the Bottom Up Middle- and High School-level textbooks do not contain sufficient geological data to illustrate interesting problems and natural hazards that are related to local geological urban settings, thus forcing teachers to do their own research. |
