Vegetational Patterns in the Herrin and Springfield Coals (Middle Pennsylvanian of Illinois), Based on Miospore Profiles With Comparison to Coal-Ball Patterns
Mahaffy, James Francis
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https://hdl.handle.net/2142/87069
Description
Title
Vegetational Patterns in the Herrin and Springfield Coals (Middle Pennsylvanian of Illinois), Based on Miospore Profiles With Comparison to Coal-Ball Patterns
Author(s)
Mahaffy, James Francis
Issue Date
1999
Doctoral Committee Chair(s)
Tom L. Phillips
Department of Study
Plant Biology
Discipline
Plant Biology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Geology
Language
eng
Abstract
Miospore distribution patterns suggest differences in some ecological requirements of their source plants. One of the major tree-fern miospores, Thymospora, shows a pattern different than some of the other tree-fern miospores, especially at Sahara where it rises to second in abundance in the top zone at 29%. Thymospora is less abundant (less than 16%) in the two most complete profiles from Old Ben, but at both localities shows less rapid changes in abundance than two other Psaronius miospores. Perhaps the tree fern that produced Thymospora occupied less disturbed sites.
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