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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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
Doctoral Committee Chair(s):	Tom L. Phillips
Department / Program:	Plant Biology
Discipline:	Plant Biology
Degree Granting Institution:	University of Illinois at Urbana-Champaign
Degree:	Ph.D.
Genre:	Dissertation
Subject(s):	Geology
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.
Issue Date:	1999
Type:	Text
Language:	English
Description:	211 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999.
URI:	http://hdl.handle.net/2142/87069
Other Identifier(s):	(MiAaPQ)AAI9921712
Date Available in IDEALS:	2015-09-28
Date Deposited:	1999