⁴⁰Ar/³⁹Ar age-spectrum data for whole rock samples of the Martinsburg Formation, Lehigh Gap area, Pennsylvania
By: by Michael J. Kunk, and Robert P. Wintsch.
Contributors: Wintsch, Robert Peter, 1946-; Geological Survey (U.S.)
Series: Open-file report -- 96-95.; U.S. Geological Survey open-file report -- 96-95.
Publisher: U.S. Dept. of the Interior, Geological  Survey
Published: 1996
Place of publication: [Reston, Va.]
Language: eng
Format: Microform
Subjects: Argon-argon dating -- Pennsylvania -- Martinsburg Formation Region.
Other titles: Forty Ar, thirty nine Ar age spectrum data for whole rock samples of the Martinsburg Formation, Lehigh Gap area, Pennsylvania.
Notes: Shipping list no.: 98-0809-M.

Microfiche. [Washington, D.C.] : Supt. of Docs., U.S. G.P.O., [1997] 1 microfiche.