4:66 Kindle — Niagara Domes of Northern Indiana. 



the half mile exposure, north of the dome. " Slickened-sides " 

 characterize the contact of some of the beds in the dome. 



A group of small domes occurs in the Wabash Valley near 

 Lagro. One of these, known as the Hanging Rock, is situated 

 about one mile southeast of Lagro. It consists of a mass of 

 limestone and shale which rises abruptly from the bank of the 

 Wabash River to a height of about eighty feet. The beds 

 exhibit quaquaversal dips and represent a part of a dome, the 

 north and east sides of which have been cut away by the river. 

 The upper beds clip to the south and west at an angle of 25°. 

 The lower strata are less inclined. 



Fig. 4. — Cross section of Wabash dome. 



At Huntington, a large area of Niagara limestone is exposed 

 at the quarry one mile east of town. The beds here exhibit 

 quaquaversal dips and indicate a dome having its center 

 within and near the east side of the area exposed by the 

 quarry. The highest dips noted here are 35° or 40°. The 

 exposures are not sufficiently extended to determine the exact 

 diameter of the dome, but from the horizontal strata exposed 

 in nearby outcrops it is probable that it does not exceed 2000'. 

 At the old quarry, a quarter of a mile northeast, the strata are 

 horizontal. 



The quaquaversal dips show a general tendency to drop 

 rapidly from a high inclination to nothing. This is noticeable 

 at the quarry half a mile west of Huntington. The beds in the 

 new quarries on the north side of the railroad show a dip of 

 25° to the south, while the strata in the old quarry, not more 

 than 100 yards away show dips of from l-J-° to 0. It was 

 doubtless the proximity of outcrops showing highly tilted 

 strata to those of horizontal beds which led Owen* into the 

 error of reporting tilted Devonian rocks at Huntington resting 

 *Ind. Geol. Surv., 1859-60, p. 66. 



