JOURNAL 
VOL. XXIV 
OF THE 
Mitchell Scientific Society 
library 
NEW YOt 
botanic 
GARDEf' 
MAY, 1908 
NO. I 
MICRO -STRUCTURE AND PROBABLE ORIGIN OF FLINT - 
LIKE SLATE NEAR CHAPEL HILL, 
NORTH CAROLINA 
H. N. EATON 
Two miles south of Chapel Hill, North Carolina, along the bed 
of a small stream known as Morgan’s Creek occur extensive 
exposures of a series of rocks whose general strike is east and west. 
• From Purefoy’s Mill on the Pittsboro road eastward along the 
stream bed to a point three miles distant on the Mason farm, 
these rocks are of the same general character, and consist of a 
series of conglomerates, sandstones, and flint-like slates lying in 
places upon felsite, and dipping southward 50 to 70 degrees. 
Sills of fine grained acid and basic igneous r cks are frequently 
found intercalated in this series, and all the rocks are cut by 
a set of basic dikes. The fiint-like slates alone form the basis for 
the present paper. 
This series of rocks has often been included in a great formation 
3 cof slates and schists of debatable age, extending from Virginia 
v. 1903 } 
5P 
1 
Printed May 29, 1908 
