- silicates, is also
called fireclay. Just as not all
underclays are fireclays, not all
fireclays are
underclays.
Within carboniferous and
other coal-bearing strata...
- (especially
flint clays) are
mined at depth,
found as a seatearth, the
underclay ****ociated with coal measures. "Calciners and
Dryers in
Mineral Industries"...
- Thin coal seam with
underclay pervasively churned by
roots as
cored from the
Lower Cretaceous (Berriasian to
lower Valanginian)
Hibernia Formation at...
-
immediately underlying coal seams,
often called either "seatearth" or "
underclay",
typically either consists of or
contains a paleosol.
Paleosols are soils...
- of clay minerals;
effects of heat on clay minerals; clay
minerals in
underclays, shales, limestones, sandstones, and lakes; clay
minerals in
soils and...
- byproduct.
Their primary source of clay was the 8 to 12 foot (2.5 to 4 meter)
underclay found immediately below the coal. What
Cheer Clay
Products was organized...
-
underbuild underburn underbury underbust underbusy underbuy undercarve underclay undercliff undercloth underclothes underclothing underclustering undercome...
-
correlate with the
suspended sediment measurements and are thus
attributed to
underclay disturbances caused by mining, as do its
elevated copper concentrations...
- the
bottom of Buck
Mountain (no. 5) coal bed or at the
bottom of the
underclay or
shale bed
below this coal measure.
Since this is the last bed deposited...
