Anticline in Southern Minnesota. — Focrste. 361 
Silurian times, so that Silurian formations were never de- 
posited along' its crest, or whether the anticline originated at a 
later date, the absence of Silurian strata being due to sub- 
sequent removal by erosion, must be determined by other ev- 
idence. 
The western boundary of the area within which Silurian 
strata are absent is necessarily conjectural between Ray wick 
and Lafayette. Recent operations within the oil field near 
Glasgow, however, have suggested the presence of Silurian 
strata immediately beneath the New Albany or Chattanooga 
Black slate. 
B. The Silurian east of the anticline in southern 
Kentucky. 
The distance between Neals Creek church and Little Cub 
creek is much less than that between Raywick and Lafayette 
and the determination of the eastern boundary of the area 
within which Silurian strata are absent is assisted both by the 
numerous exposures between Stanford and Liberty, at which 
the Devonian rests directly upon the Ordovician, and also by 
the recent discovery of Silurian strata about 5 miles west of 
Somerset, along Fishing creek. 
This discovery was made by Prof. Arthur jNL Miller of the 
State College of Kentucky. The exposures occur on both sides 
of Fishing creek, chiefly north of the bridge, for a distance of 
about 2 miles, and along a branch flowing north of the home 
of A'. L. Gossett and entering Fishing creek from the west. 
The Silurian here is 17 feet thick. North of the bridge, the 
lower 7 feet are massive, have a bluish color, and are very 
fine-grained, without a trace of fossils. Lithologically they 
resemble very much the lower part of the Clinton as exposed 
between Bardstown and Raywick, west of the anticline in cen- 
tral Kentucky. Similar rock occurs at the base of the Clinton 
in many parts of (iarrard and Madison counties, east of the 
anticline. Above this massive rock occur 10 feet of dis- 
tinctly bedded limestone. At the top of this section, a "layer 
about I foot thick contains large crinoid beads, such as are 
characteristic of the Clinton, numerous specimens of a coral 
identified provisionally as Bnterolasma calycula, and one 
specimen each of DaUnaneUa elcgantula, Calyininene I'og- 
desi, and WhitfieldcUa cylindrica snbquadrata. The Whit- 
