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- W1970944774 abstract "Mechanical and sample-log correlations give the following results. The Tully of northwest Pennsylvania is a sequence of lenses at differing levels, confirming earlier ideas. The Delaware, Columbus, and Bois Blanc can be correlated eastward into Pennsylvania. The Bois Blanc is absent south and east of Warren County; southward, it grades into the Huntersville Chert. It contains a basal sandy zone locally unconformable on and commonly miscorrelated with the Oriskany. The Oriskany unconformably overlies rocks as old as Late Silurian around the basin margin, but into the basin is conformable on the upper Helderberg. The no sand area may be a clastic-starved carbonate facies of the Oriskany, rather than Helderberg. In southern Pennsylvania, a lower sandstone separate from t e main Oriskany body may be Helderberg, previously miscorrelated. The Helderberg of northwest Pennsylvania is probably Manlius or older. The Salina Group in Pennsylvania is readily correlated northwestward; good regional markers are the Camillus Shale of New York and the C shale of Michigan. The top of the Salina G corresponds nearly to the top of the Tonoloway, the top of E to the top of the Wills Creek, and the Lockport equals part of the McKenzie. The upper McKenzie probably includes the Salina A. The Rochester Shale thins southeastward, whereas the Rose Hill thickens markedly. The Irondequoit Dolomite of the north is about in the position of the Keefer of the southeast. The Grimsby of the north and west is approximately equal to the Castanea and Tuscarora; the Whirlpool coalesces int the middle and possibly lower Tuscarora. Southeast of a line from northwest Somerset County through central Fayette County into West Virginia, the Tuscarora-Queenston unconformity is gone and the contact is a transition zone. Therefore, some of the basinward lower Tuscarora may be Ordovician. End_of_Article - Last_Page 1893------------" @default.
- W1970944774 created "2016-06-24" @default.
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- W1970944774 date "1974-01-01" @default.
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- W1970944774 title "Tully (Middle Devonian) to Queenston (Upper Ordovician) Correlations in Subsurface of Western Pennsylvania: ABSTRACT" @default.
- W1970944774 doi "https://doi.org/10.1306/83d91a15-16c7-11d7-8645000102c1865d" @default.
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