5/6 A. F. FOERSTE 



home of J. H. Johnson, Pisocrinus milligani and other character- 

 istic Brownsport fossils occur in hard limestone layers. The 

 clayey fossiliferous bed is exposed also about a quarter of a mile 

 south of the Colonel Smith locality, on the south side of Boone 

 Creek, along a road leading up hill. It is here overlaid by more 

 solid limestone. 



The old A. B. Gant homestead is located about a mile north- 

 east of Martin's mill. The fossils studied by Safford were 

 obtained a quarter of a mile east of the house, on the hill slope 

 200 yards northeast of the plantation stables. A considerable 

 interval, stratigraphically, separates the Hardin sandstone,'' which 

 here is the sole representative of the Black shale series, from the 

 layer of massive, coarse, gray, sandy limestone, lO feet thick 

 (Layer 3), which furnished the fossils. Owing to weathering, 

 great slabs of the Hardin sandstone have slipped down the hill- 

 side until almost in contact with the coarse sandy limestone. 

 However, at a gully farther eastward, and also near the school- 

 house on Indian Creek, still farther eastward, the intervening 

 section is clearly exposed. The existence of a considerable 

 interval between the Hardin sandstone and the coarse sandy 

 limestone was recognized by Professor Safford at Craven's mill 

 (par. 845), where the exposures are better. At this locality the 

 massive, sandy limestone and the overlying Silurian section (2) 

 was referred by Professor Safford provisionally to the Helderberg 

 limestone, but in the statement preceding the list of Helderberg 

 fossils (par. 849) he states that it may be found desirable upon 

 further investigation to refer these beds to the Niagara horizon. 

 For purposes of discussion it will be found convenient to apply 

 the name Gant limestone to the coarse sandy limestone under dis- 

 cussion, and the term Gant bed to the top of Silurian section 

 including the Gant limestone at its base. 



The former site of Craven's mill was located about half-way 

 between the A. B. Gant homestead and Martin's mill, a short 

 distance east of the point where the road following Indian Creek 

 turns southward toward Martin's mill. Almost directly opposite 

 this bend of the road, the Gant limestone is 10 feet thick. An 



^Ibid., par. 844, Layer 4. 



