A structure in which the load-bearing members are arranged in such a way
that the weights and forces are transmitted to the foundations by the
cheapest means consistent with safety and permanency. Nelson
a. A whitish fluffy or crystalline powder, produced as a surface
encrustation on a rock or soil in an arid region by evaporation of water
brought to the surface by capillary action or by loss of water of
crystallization on exposure to the air. It may consist of one or several
minerals, commonly soluble salts such as gypsum, calcite, natron, and
halite. Syn:bloom
b. The process by which an efflorescent salt or crust is formed.
AGI
In mineralogy, forming an incrustation or deposit of grains or powder that
resembles lichens or dried leaves; not uncommonly due to loss of water of
crystallization. Fay
A liquid, solid, or gaseous product, frequently waste, discharged or
emerging from a process.
a. The property of gases that allows them to pass through porous bodies;
i.e., the flow of gases through larger holes than those to which diffusion
is strictly applicable. Osborne
b. The emission of relatively fluid lava onto the Earth's surface; also,
the rock so formed. CF:extrusion
See:extrusive
A Welsh term for copper.
a. A particular size of anthracite coal that passes through 3-1/4-in to
3-in (8.26-cm to 7.62-cm) round holes and over 2-1/16-in (5.24-cm) round
holes. See also:anthracite coal sizes
b. A particular size of bituminous coal that passes through 4-in (10.2-cm)
round holes and over 1-1/2-in (3.81-cm) round holes (sizes are not uniform
but vary with the coalfield). Jones, 1
See:briquette
See:oolite
An isometric mineral, Hg6 Cl3 O(OH) or Hg4 Cl2
O ; forms brownish-yellow (darkening to black on exposure) dodecahedra
with montroydite, calomel, and other mercury minerals at New Idria, CA,
and Terlingua, TX.
A monoclinic(?) material, CaFe14 (PO4 )10 (OH) (sub
14) .21H2 O(?) ; forms yellowish-brown nodules with fibrous
lamellar structure embedded in clay with trona and thernardite in the
Eguei#1. region of Chad and Sudan. (Not yet adequately described for a
mineral species.)
Banded calcite from near Thebes, Egypt. See also:onyx marble
Emeralds from the ancient Egyptian mines of Jabal Sukayt and Jabal Zab-rah
east of Aswan, in mica schist and talc schist.
a. A banded jasper found as pebbles scattered over the surface of the
Egyptian desert chiefly between Cairo and the Red Sea; used as a
broochstone and for other ornamental purposes. Syn:Egyptian pebble
b. Any jasper in which the colors run in zones.
See:Egyptian jasper
Term properly applied only to peridot (olivine) from St. John's Island in
the Red Sea.
Any of a series of explosive mixtures containing potassium chlorate,
together with tannin, powdered nutgalls, or cream of tartar. Used for
blasting, shells, etc. Fay
A handworked muffle furnace. Fay
A multiple twin consisting of eight individuals. CF:cyclic twin;
trilling; fourling; fiveling.
Drills or drifters mounted on a horizontal drill bar supported by the
rocker shovel of an Eimco loader.