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September 1998 Table of Contents Volume 43 Number 9

  • Letters
  • Calendar
  • About People
  • Classified Ads
  • Industry Watch 
  • Benchmarks
  • Geologic Phenomena
  • Geologic Column
  • Geomedia
  • AGI Announces


    Kristina Bartlett and Devra Wexler

    Iron, iron everywhere, but not at Big Sur ... Sediments douse fire theory ... Redefining the Ocean Drilling Program ... Slipping away on Venus ... Cold War's hot technology ... A king's supper ... Disaster warnings in real time ... Getting to the core of climate change

    Lobbying and the Geoscience Community
    David Applegate


    PPP 2000 -- A New Approach to Dealing with Disasters
    Timothy A. Cohn and Kathleen K. Gohn


    Plant-Insect Associations from the Fossil Record
    by Conrad C. Labandeira 
    A curator from the Smithsonian's National Museum of Natural History studies the fossil record to document the complex relationship between plants and their insect predators. Examining types of flora and insect herbivores can establish whether some insect and plant lineages are ancient associations or whether older associations were swamped repeatedly by evolving species.

    The Complexity of Urban Stone Decay
    by Erhard M. Winkler
    Since the beginning of the Industrial Revolution, the rate of most types of stone decay has increased dramatically, particularly in urban areas. A professor emeritus from the University of Notre Dame describes the effects of acid rain, humidity, salts, and other elements on buildings and infrastructures in a variety of climates.

    See the related press release describing the September issue.

    agilogo © 1998 American Geological Institute. All rights reserved. Any copying, redistribution or retransmission of any of the contents of this service without the express written consent of the American Geological Institute is expressly prohibited.

    September Geotimes cover: The Late Pennsylvanian coal-swamp forest at Berryville, Illinois Basin, reconstructed from coal-ball permineralizations. The dominant tree-fern Psaronius is depicted at center and the subdominant seed-fern Medullosa is at left. Pole-like sigillarian lycopods are in the background. Inferred consumers of Psaronius include trunk detritivores such as oribatid mite borers of the root mantle at lower left and a cockroach-like stem borer at lower right, and canopy insect herbivores such as (in clockwise order, beginning center left) a larval holometabolous galler, protorthopteran external foliage feeder (upper left), nymphal paleodictyopteroid spore imbiber (upper right), and an adult paleodictyopteroid piercer-and-sucker (center right).
    Illustration by Mary Parrish.

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