oxide	/'Dk.said/	a chemical combination of oxygen and one other element
pyroxene	/pAi>Dksi:n/	any of a large class of rock-forming silicate minerals, generally containing calcium, magnesium, and iron and typically occurring as prismatic (hranolový) crystals
amphibole	/'amfibaul/	any of a class of rock-forming silicate or aluminosilicate minerals typically occurring as fibrous /'f/ubras/ (vláknovitý) or columnar / ks-'lam-nar/ crystals.
silicate	/'sil.i.kat/	any of a large number of common minerals formed of silica, oxygen, and one or more other elements
silica	/'sil.i.k9/	a mineral that exists in various forms, including sand, quartz, and flint, used to make glass and cement
hematite	'hi:.ma,tait/	a common dark red or grey rock from which iron is obtained
limonite	/'[AimanAit/	an amorphous brownish secondary mineral consisting of a mixture of hydrous ferric oxides, important as an iron ore.
amorphous	/a 'mo:, fas/	having no fixed form or shape
hyd rated	/hai'drei.tid/	having absorbed enough water or other liquid
geothite	'gaitAit/	a dark or yellowish-brown mineral consisting of hydrated iron oxide, occurring typically as masses of fibrous crystals.
give off		to produce
ion	/'ai.Dn/	an atom or small group of atoms that has an electrical charge because it has added or lost one or more electrons
dissociate	/di'saa.jl.eit/	to consider as separate and not related
disrupt	/dis'rApt/	to prevent something, especially a system, process, or event, from continuing as usual or as expected
to substitute for	/'sAb.sti.tJu:t/	to use something or someone instead of another thing or person
to decompose	^dii.kam'pauz/	to break, or to break something, into smaller parts
sulphuric acid	/sAÍ.fjua.nk 'aes.id/	a strong acid with no colour
emit	/i'mit/	to send out a beam, noise, smell, or gas
vent	/vent/	a small opening that allows air, smoke, or gas to enter or leave a closed space
pyrite	/'pai.rart/	a shiny, yellow mineral containing iron and sulphur, that looks like gold but is not valuable
angular	/'aerj-gjs.lsr/	having a clear shape with sharp points
spherical	/'sfmkal/	round, like a ball
edge	/ed3/	the outer or furthest point of something
successive	/sak'ses.iv/	happening one after the other without any break
penetrate	/'pen.i.treit/	to move into or through something
clay	/klei/	thick, heavy soil that is soft when wet, and hard when dry or baked, used for making bricks and containers
bulk	/bAik/	large size or mass
exert	Ag'z3:t/	to use something such as authority, power, influence, etc. in order to make something happen
spall off	spoil	Break {ore, rock, or stone) into smaller pieces
sheeting		The process by which thin sheets, scales, plates, or flakes of rock are successively broken loose or stripped from the outer surface of a large rock mass. Also known as exfoliation.
abrade	/s'breid/	to remove part of the surface of something by rubbing
abrasion	/a'brei^an/	the process of rubbing away the surface of something
tumble	/'t/\m.bal/	to fall quickly
to grind	/graind/	to make something into small pieces or a powder by pressing between hard surfaces
glacier	/'glses.i.ar/	a large mass of ice that moves slowly
batholith	'ba9ali9/	a very large igneous rock extending to an unknown depth in the earth's crust.
granite	/'graen.rt/	a very hard, grey, pink, or black rock, used for building
concentric	/kan'sen.trik/	Concentric circles and rings have the same centre
slabs	/slaeb/	a thick, flat piece of a solid substance, such as stone, wood, metal, food, etc., that is usually square or rectangular
burrow	/'bAr.su/	to dig a hole in the ground, especially to live in
to pry	/prai/	to move or lift something by pressing a tool against a fixed point
brittle	/'bnt.al/	delicate and easily broken
deep-seated	/di:p'si:.tid/	firmly established at a deep or profound level.
to trickle	/'trik.al/	If liquid trickles somewhere, it flows slowly and without force in a thin line
to thaw	/6a:/	to (cause to) change from a solid, frozen state to a liquid or soft one, because of an increase in temperature
latitude	/'laet.i.t[u:d/	the position north or south of the equator measured from 0° to 90°
(season)	/prs'naunst/	very noticeable or certain
heaving	/hi:v/	to move something heavy using a lot of effort
bulge	/bAld3/	to stick out in a round shape (vyboulit se)
spongy	/'spAn.d3i/	soft and able to absorb or having already absorbed a lot of liquid, like a sponge