Page 715 - calmining1890

SOLANO COUNTY. 665
I At Bird's Landing there is a break in the Montezuma Hills, and the
[rells average from sixty-five to seventy feet in depth. The formation
•bserved has been as follows:
of
Thickness
Character of Strata. Strata, in feet.
■.Surface soil, ranging from clayey to sandy loam 2 to 3
\ fellow clay, with sub-angular pebbles; this stratum frequently contains
streaks of sand yielding a little water 60 to 70

Sand and gravel, dark colored when first taken out, but blue when
Miry; this stratum is usually penetrated two or three feet, and yields a
I^ood supply of water, which rises to within fourteen feet of the surface.
■A. redwood log is said to have been penetrated when boring a well about
fcialf a mile northwest of Bird's Landing.
In digging a well in a depression adjacent to the creek at Bird's Land-
ling, flowing water was struck at an inconsiderable depth; the water-
[bearing gravel, which yielded the flow, no doubt cropped out in the bed
pf the creek at no great distance.
! Towards Collinsville, about one and a half miles south of Bird's Land-
ling, a well was dug on the Bird Ranch to a depth of thirty feet, and
|afterwards bored to a depth of ninety feet. The formation observed was
las follows:
of
Thickness
Character of Strata. Strata, in feet.
Sandy loam
Tough yellow clay
Brown sandy stratum, a few inches in thickness, yielding a little water
Yellow clay, with subangular fragments of rock
Blue clay
Yellow clay, with subangular fragments of rocks

Sand, dark colored when wet, blue when dry. This stratum was pene-
trated a few feet; it yielded a good supply of water, which had a slightly
mineral" taste.
Closer to the river in the "tule" lands good water has been obtained
in some places at a depth ranging from ten to fifty feet.
The water in the river and sloughs at this point is fresh until August,
at which season the ocean tide predominates over the fresh water of the
river.
Between Denverton and Bird's Landing, a fair supply of potable
water is obtained at a depth of from forty feet in depressions, to ninety
feet upon higher ground. The wells are usually dug, the supply of
water from a bored well at these depths not being sufficient to supply a
windmill pump.
The formation observed in digging a forty-foot well in this district
was as follows:

Thickness of
Character of Strata.
Strata, in feet.
Sandy loam... 4
Soft sandstone 25
Hard blue clay 1
Sandstone 10