Sherzer—Native Sulphur in Michigan. 24:7 
one of the minerals of this state, although as early as 1865 
Prof. E.-A. Strong collected from the gypsum beds of Grand 
Rapids a quart, or more, of platy particles, which he forwarded 
to Dr. Alexander Winchell, previously State Geologist. 
_ The. present locality is in the northern part of the county, 
upon the line of the Lake Shore and Michigan Southern R.R., 
one mile west of the village of Scofield. Here a quarry was 
opened some three years ago by the Michigan Stone & Supply 
Co., of Detroit, the rock being crushed and used mostly for 
macadamizing purposes. The bed-rock is overlain with from 
four to seven feet of soil and blue bowlder clay and its surface 
is scratched and grooved by glacial action. Channels and 
large ‘‘sink-holes” have been dissolved out by the water from 
the surface. The upper four feet of this bed is a grayish 
impure limestone, considerably “jointed,” made up of fine, 
closely compacted layers, frequently contorted and banded 
with carbonaceous matter. It contains, in places, great num- 
bers of small, obscurely defined fossils. This passes into a 
compact dolomitic limestone, from seven to eight feet in thick- 
ness, beneath which lies the so-called “sulphur-bed.” This is 
a stratum of yellowish-brown impure limestone, varying in 
thickness from one to three feet and having but little dip. It 
contains brachiopods, corals and bryozoa and considerable car- 
bonaceous material, here and there giving a strong oily odor. 
Wherever exposed to view it is seen to be cavernous in struc- 
ture, the pockets varying in size from a fraction of an inch up 
to three feet. The larger ones are flattened and lie with their 
longer axes parallel to the plane of the bed, as though dis- 
solved out by water flowing along the bed, rather than from 
above. Just beneath this “sulphur bed,” and quite sharply 
separated from it, is a seam of bluish-gray, gritty, siliceous 
lime-rock, varying in thickness from one to three feet. This 
is curiously streaked with flexuous, but approximately vertical 
channels, lined with brownish, carbonaceous material, sug- 
gestive of the remains of fucoid stems. Under the magnifier 
the entire rock is seen to be finely porous and to consist of 
sand grains embedded in the calcareous paste. Passing down- 
ward, the rock becomes more of the nature of a sandstone and 
is said to become softer. The ‘sulphur bed” is thus seen to 
lie from sixteen to eighteen feet below the surface between a 
compact, dolomitic limestone and a calcareous sand rock. The 
pockets in the bed, above described, are lined with scaleno- 
hedrons of calcite, or tabular crystals of celestite, or both 
together. In some places the latter mineral becomes a choco- 
late brown. The sulphur generally occurs in bright lustrous 
masses towards the center of the cavity, intermatted frequently 
with the above minerals. Fragments as large as one’s fist are 
