MICHIGAN ACADEMY OF SCIENCE. 
93 
face, the Modified Anderdon also shows the basin form of deposit in 
the cross section. 
A consideration of the elevations in the same test holes in the same 
order gives the same results : 
Elevation of Anderdon at 15, 570.36 A. T. 
at 17, 570.63, 
at 22, 566.00, 
at “9,” 558.26, 
at “8,” 547.50, 
at “4,” 576.1 5, and 
at “5,” 563.80 ; 
Elevation of Modified Anderdon : 
at 17, 565.13, 
at 22, 543.50, 
at “9,” 526.26, 
at “8,” 519.50, 
at “4,” 564.90, and 
at “5,” 553.30 ; 
Elevation of Transitional Rock : 
at 15, 570.32, 
at 17, 543.05, 
at 22, 519.66, 
at “9,” 507.26, 
at “8,” 496.00, 
at “4,” 535.56, 
at “5,”' not penetrated. 
The basin, as shown bv elevations of the Anderdon at No. 15 and No. 
t/ 
“ 5 ” — has a lip rim, occasioned by uplift of the inner area in relation to 
the outer. 
The evenness of the basin shape is evident if it be remembered that 
the distance from No. “8” to No. “4,” 1,725 feet, is more than three 
times any other separating distance; that Nos. 17 and 15 are 1,000 feet 
apart; and that another test is needed about 350 feet N. x N. NW. of 
No. “5” to contrast with No. 15 at extreme S. x S. SE., for a complete 
comparison. 
A cross section from NE. to SW., from the Sol White quarry hole, 
by way of the Amherstburg quarry limestone cut, test holes No. “8” 
and No. “7,” to No. 20 shows the same basin-shaped deposit. 
EARTH MOVEMENTS OVER THE ANDERDON AREA. 
The evidences of earth movement over the Anderdon limestone area 
during Transitional, Anderdon and Corniferous time are of very pro- 
nounced character. 
Included in the transitional rock shown up by cross section of the 
Malden Valley already presented, is a deposit characterized by quantities 
of calcium carbonate crystal, in bulk, so to say. In drill core No. 10 
this is 48 inches in depth; in No. 11, 700 feet west it is 36 inches in 
depth; in No. 12, 700 feet west of No. 11, there is but 26 inches; and 
