GEOLOGY BETWEEN APALACHICOLA AND OCKLOCKNEE RIVERS. 1 5 
their appreciation of the assistance thus received from these vari- 
ous sources, which has very much facilitated the preparation of this 
report. 
DESCRIPTION OF BENCH MARKS. 
Midway, about 50 meters west of the Seaboard Air Line Railway station, 
8 meters south of the main track. Elevation, 196.758 feet. 
About 4 miles west of Midway, 100 meters west of mile post 181, 8 meters 
south of the Seaboard Air Line Railway track, level with the top of the rail, 
just east of a high railway embankment. Elevation, 122.395 feet. 
About 3 miles east of Quincy, 100 meters west of mile post 186, 8 meters 
south of the Seaboard Air Line Railway track, 300 meters east of an overhead 
road crossing. Elevation, 218.182 feet. 
Quincy, about opposite the east end of the Seaboard Air Line Railway 
station, 15 meters south of the main track. Elevation, 243.054 feet. 
About 4 miles west of Quincy, 500 meters west of mile post 193, near road 
crossing, 8 meters south of Seaboard Air Line Railway track. Elevation, 275.941 
feet. 
Mount Pleasant, 30 meters southwest of the Seaboard Air Line Railway 
station, 8 meters south of the railroad track nearly opposite the U. S. mail stand. 
Elevation, 296.049 feet. 
About 3 miles west of Mount Pleasant, 40 meters west of mile post 201, 
8 meters south of the Seaboard Air Line Railway track. Elevation, 185.800 feet. 
River Junction, 400 meters east of the Union Passenger station, bench mark 
is the highest point of the bolt in the northwest pillar of the railway water 
tank. It is 2 meters south of the main track. Marked U. S. B. M. Eleva- 
tion, 76.096 feet. 
River Junction, opposite the three-story brick building, 300 meters north- 
east of the Union Passenger station. Bench mark is the highest point of a 
railroad rail (projecting 2]/ 2 feet) acting as a guard at the corner of sidewalk. 
Elevation, 75.932 feet. 
River Junction, about 350 meters west of the Union Passenger station, 100 
meters west of the west end of the Seaboard Air Line and Atlantic Coast Line 
Railroad freight house, 30 meters south of the main track. Elevation, 79.577 
feet. 
About 2 miles west of River Junction, 65 meters west of west concrete pier 
of Louisville and Nashville Railroad bridge over the Apalachicola River, 1 
meter north of trestle, bench mark is the top of a copper bolt set in a concrete 
post. Elevation, 63.786 feet. 
About 2 miles west of River Junction in the triangle formed by three 
blazed trees ; one of which is a 20-inch white oak, distant 20 feet ; another is a 
24-inch post oak, distant 100 feet ; and the other is a 10-inch walnut, distant 
127 feet. The bench mark is a copper bolt in a concrete post, ico meters south- 
west of the west concrete pier at the west end of the Louisville and Nashville 
Railroad bridge over the Apalachicola River, and about 3 meters from the 
bank of the river. Elevation, 64.062 feet. 
