Organic metamorphism in Middle Ordovician carbonates, Lebanon Valley nappe, Pennsylvania

James C. Hower; Maryann L. Malinconico

doi:10.1016/S0166-5162(99)00041-5

Organic metamorphism in Middle Ordovician carbonates, Lebanon Valley nappe, Pennsylvania

James C. Hower, Maryann L. Malinconico

Earth and Environmental Sciences

Research output: Contribution to journal › Article › peer-review

Abstract

An assemblage of highly brecciated organic fragments at the contact of the Middle Ordovician Annville and Myerstown Formations in the Lebanon Valley nappe, Lebanon County, Pennsylvania, was found to have maximum reflectances generally exceeding 8% R, with the highest values approaching 13% R. Such reflectance values are consistent with greenschist facies metamorphism, the latter supported by metamorphic mineral assemblages. Brecciation and metamorphism of the organics probably occurred at the time of the emplacement of the nappe during the Ordovician Taconic orogeny. (C) 2000 Elsevier Science B.V. All rights reserved.

Original language	English
Pages (from-to)	221-230
Number of pages	10
Journal	International Journal of Coal Geology
Volume	42
Issue number	2-3
DOIs	https://doi.org/10.1016/S0166-5162(99)00041-5
State	Published - Jan 2000

Keywords

Appalachians
Greenschist facies
Ordovician
Organic metamorphism
Pennsylvania
Taconic orogeny

ASJC Scopus subject areas

Fuel Technology
Geology
Economic Geology
Stratigraphy

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title = "Organic metamorphism in Middle Ordovician carbonates, Lebanon Valley nappe, Pennsylvania",

abstract = "An assemblage of highly brecciated organic fragments at the contact of the Middle Ordovician Annville and Myerstown Formations in the Lebanon Valley nappe, Lebanon County, Pennsylvania, was found to have maximum reflectances generally exceeding 8% R, with the highest values approaching 13% R. Such reflectance values are consistent with greenschist facies metamorphism, the latter supported by metamorphic mineral assemblages. Brecciation and metamorphism of the organics probably occurred at the time of the emplacement of the nappe during the Ordovician Taconic orogeny. (C) 2000 Elsevier Science B.V. All rights reserved.",

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AB - An assemblage of highly brecciated organic fragments at the contact of the Middle Ordovician Annville and Myerstown Formations in the Lebanon Valley nappe, Lebanon County, Pennsylvania, was found to have maximum reflectances generally exceeding 8% R, with the highest values approaching 13% R. Such reflectance values are consistent with greenschist facies metamorphism, the latter supported by metamorphic mineral assemblages. Brecciation and metamorphism of the organics probably occurred at the time of the emplacement of the nappe during the Ordovician Taconic orogeny. (C) 2000 Elsevier Science B.V. All rights reserved.

KW - Appalachians

KW - Greenschist facies

KW - Ordovician

KW - Organic metamorphism

KW - Pennsylvania

KW - Taconic orogeny

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ER -

Organic metamorphism in Middle Ordovician carbonates, Lebanon Valley nappe, Pennsylvania

Abstract

Keywords

ASJC Scopus subject areas

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