Ravn,R.L.

Author:
Ravn,R.L.

Year:
1986

Title:
Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa

Reference:

Ravn,R.L. (1986) Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa Iowa Geological Survey,Technical Paper # 7 P. 1- 244

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Genus	Species	Country(Region)	From	To
Torispora	Torispora securis	Iowa	Middle Pennsylvanian
Trematozonotriletes	Trematozonotriletes variabilis	Iowa	Morrowan
Tricidarisporites	Tricidarisporites arcuatus	Iowa	Morrowan	Atokan
Tricidarisporites	Tricidarisporites fasciculatus	Iowa	Morrowan	Atokan
Trihyphaecites	Trihyphaecites triangulatus	Iowa	Morrowan	Desmoinesian
Trilites	Trilites armatus	Iowa	Middle Pennsylvanian
Trilites	Trilites sulcatus	Iowa	Desmoinesian
Trilobates	Trilobates	Nd	Nd
Trilobates	Trilobates bellii	Iowa	Atokan
Trinidulus	Trinidulus diamphidios	Iowa	Morrowan
Triquitrites	Triquitrites additus	Iowa	Atokan	Early Missourian
Triquitrites	Triquitrites bransonii	Iowa	Atokan	Early Missourian
Triquitrites	Triquitrites crassus	Iowa	Middle Pennsylvanian
Triquitrites	Triquitrites exiguus	Iowa	Atokan	Early Missourian
Triquitrites	Triquitrites magnificus	Iowa	Desmoinesian	Early Missourian
Triquitrites	Triquitrites minutus	Iowa	Middle Pennsylvanian
Triquitrites	Triquitrites ornatus	Iowa	Atokan	Early Missourian