Bibliographic Citation
| Document | For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field. For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability. |
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| Title | The Frasnian-Famennian boundary (Upper Devonian) within the Hanover-Dunkirk transition, northern Appalachian basin, western New York state |
| Creator/Author | Over, D.J. (State Univ. of New York, Geneseo, NY (United States)) |
| Publication Date | 1993 Mar 01 |
| OSTI Identifier | OSTI ID: 7281384 |
| Report Number(s) | CONF-9303210-- |
| Other Number(s) | ISSN0016-7592; CODEN: GAAPBC |
| Resource Type | Conference |
| Specific Type | Journal Article |
| Resource Relation | Geological Society of America, Abstracts with Programs ; Vol/Issue: 25:3; 27. annual Geological Society of America (GSA) North-Central Section meeting; 29-30 Mar 1993; Rolla, MO (United States) |
| Subject | 580000 -- Geosciences; GEOLOGIC FORMATIONS-- AGE ESTIMATION;GEOLOGIC FORMATIONS-- STRATIGRAPHY;NEW YORK-- GEOLOGIC FORMATIONS;SHALES-- AGE ESTIMATION;SHALES-- STRATIGRAPHY; FOSSILS;PALEONTOLOGY |
| Related Subject | DEVELOPED COUNTRIES;GEOLOGY;NORTH AMERICA;ROCKS;SEDIMENTARY ROCKS;USA |
| Description/Abstract | In western New York State interbedded pyritic silty green and dark grey shales and siltstone of the Hanover Member, Java Formation, West Falls Group, are overlain by thick pyritic dark grey-black shale of the Dunkirk Member of the Canadaway formation.^The dark shales in the upper Hanover and Dunkirk contain a diverse and well preserved conodont fauna which allows precise placement of the Frasnian-Famennian boundary at several described sections.^At Pt.^Gratiot, in far western New York State, the contact between the Hanover and Dunkirk is disconformable.^The Frasnian-Famennian boundary is marked by a pyritic lag deposit at the base of the Dunkirk which contains Palmatolepis triangularis and Pa. subperlobata.^The underlying upper Hanover is characterized by Pa. bogartensis , Pa. cf.^Pa. rhenana, Pa. winchelli, and Ancyrognathus (asymmetricus/calvini) Eastward, in the direction of the paleo-source area, the Frasnian-Famennian boundary is within the upper Hanover Member.^At Irish Gulf the boundary is recognized within a 10 cm thick laminated pyritic dark grey shale bed 3.0 m below the base of the Dunkirk.^Palmatolepis triangularis and Pa. subperlobata occur below a conodont-rich lag layer in the upper 2 cm of the bed.^Palmatolepis bogartensis , Pa. cf.^Pa. rhenana, Ancyrodella curvata, and Icriodus alternatus occur in the underlying 8 cm.^Palmatolepis triangularis and Pa. winchelli occur in an underlying dark shale bed separated from the boundary bed by a hummocky cross-bedded siltstone layer. |
| Country of Publication | United States |
| Language | English |
| Format | Pages: 71 |
| System Entry Date | 2001 May 13 |
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Last Updated: 02/09/2009