SECTIONS OF TWO MICHIGAN SALT WELLS’ 
WILLIAM H. FRY 
Bureau of Soils, Washington, D.C. 
In connection with recent investigations of American salines 
by this bureau samples from two wells of the Manistee region of 
Michigan were obtained through the courtesy of Mr. George Abair, 
of the Peters Salt Co., East Lake, Mich. 
All of the samples examined in the preparation of the sections 
were obtained by drilling, and consequently many of them were 
SECTION OF WELL AT LUDINGTON, MICH. STEARNS SALT & 
LUMBER CO. 
No. Depth in Feet 
TQ ee nACGRe et a ea 517- 520 Calcareous sandstone 
DO oy dA Peal es Readies 520- 533 Calcareous and shaly sandstone 
DED Aifiidlac Bl acs ee wig es ee 57/83 Calcareous shale 
Der AMI alias aaa gene 573- 603 Calcareous and sandy shale 
PASIAN BIEL lel 603- 608 Calcareous shale 
LOVES tne HEV MN yea 608- 609 Sandy calcareous shale 
Qe Asan Eagan 609- 615 Buff calcareous and sandy shale 
Yoy-Ooid digo aogoogec 615— 838 Calcareous shale 
AOROOR Weld sisabs, eae 838-1,2T1 Sandy calcareous shale 
OWT OOM ae Mey cea I,21I—1,390 Calcareous shale 
Moniiaticade wean oe 1,390-1,463 Limestone (impure) 
TA OO EE eee 1,463-1,801 Fairly pure limestone 
OL OTe era re ears 1,801-1,035 Dolomitic limestone 
OS HOD ola ciy sles h oe « 1,935-2,021 Calcareous mudstone 
TOR TNS hoe Sen nes 2,021-2,281 Limestone 
LESH Ose Smet ews e 2,281-2,290 Halite 
in a rather finely pulverized condition. In a number of cases, 
however, fragments large enough for macroscopic examination 
were present. In such, the specimens were determined primarily 
by macroscopic methods. In the cases where all of a particular 
sample was very finely pulverized, the material was mounted in 
various oils of definite refractive indices and the mineral con- 
stituents determined by the ordinary petrographic methods. 
t Published by permission of the Secretary of Agriculture. 
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