TY - JOUR
T1 - Revisiting Coos Bay, Oregon
T2 - A re-examination of funginite-huminite relationships in Eocene subbituminous coals
AU - O'Keefe, Jennifer M.K.
AU - Hower, James C.
PY - 2011/1/1
Y1 - 2011/1/1
N2 - Coal petrography has advanced significantly since Reinhardt Theissen and James Schopf pioneered the use of thin sections to examine coals from Coos Bay Oregon, and to many coal petrographers the nomenclature used in that study is irrelevant. The Schopf (1947) study was a ground-breaking examination of maceral relationships that need to be part of the working vocabulary of modern petrographers. To support this, a re-examination of the Coos Bay thin section collection was undertaken, using modern nomenclature for low-rank coals under reflected light. This particular collection was chosen in part because of the abundance of fungal material reported by Schopf. Fungal material in coal and its association with huminite/vitrinite macerals provides important information about the decompositional history of the coal and allows coal dominated by oxic processes to be differentiated from coal dominated by anoxic processes. In the Coos Bay samples, predominantly oxic intervals contain well-preserved fungi, including spores, sclerotia, and hyphae, while anoxic intervals contain no fungi.
AB - Coal petrography has advanced significantly since Reinhardt Theissen and James Schopf pioneered the use of thin sections to examine coals from Coos Bay Oregon, and to many coal petrographers the nomenclature used in that study is irrelevant. The Schopf (1947) study was a ground-breaking examination of maceral relationships that need to be part of the working vocabulary of modern petrographers. To support this, a re-examination of the Coos Bay thin section collection was undertaken, using modern nomenclature for low-rank coals under reflected light. This particular collection was chosen in part because of the abundance of fungal material reported by Schopf. Fungal material in coal and its association with huminite/vitrinite macerals provides important information about the decompositional history of the coal and allows coal dominated by oxic processes to be differentiated from coal dominated by anoxic processes. In the Coos Bay samples, predominantly oxic intervals contain well-preserved fungi, including spores, sclerotia, and hyphae, while anoxic intervals contain no fungi.
KW - Beaver Hill Coal
KW - Coos Bay
KW - Funginite
KW - Middle Eocene
KW - Oregon
UR - http://www.scopus.com/inward/record.url?scp=78650679093&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78650679093&partnerID=8YFLogxK
U2 - 10.1016/j.coal.2010.09.003
DO - 10.1016/j.coal.2010.09.003
M3 - Article
AN - SCOPUS:78650679093
SN - 0166-5162
VL - 85
SP - 34
EP - 42
JO - International Journal of Coal Geology
JF - International Journal of Coal Geology
IS - 1
ER -