Report of Progress ..., Volume 2

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Board of Commissioners for the Second Geological Survey, 1882
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Page xv - XV in letter of transmittal volume T2, 1882) "My own survey of the coal field, more than twenty years ago, was very elaborate, and my contoured maps of it covered two-thirds of the field." But he withheld the report until the mapping could be completed, which was never done. Preparing structure contours in the absence of topography is not satisfactory unless a great deal of information is at hand from underground mine levels, etc. Consequently it was found that...
Page 88 - It is nowhere exposed in detail, but it consists mainly of blue to very dark blue flaggy to slaty limestones, mostly non-fossiliferous. The darker limestones are fetid when struck and ring sharply. Some reddish beds near the middle of the mass are not flaggy but thick-bedded. Partial exposures of this division were seen at Hyndman and elsewhere along the west foot of Will's mountain ; a very fair exposure was found in Cumberland Valley township of Bedford county, where the thickness as given was...

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